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+<?php
+// vim: set et ts=4 sw=4 fdm=marker:
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, |
+// | Stig. S. Bakken, Lukas Smith |
+// | All rights reserved. |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
+// | API as well as database abstraction for PHP applications. |
+// | This LICENSE is in the BSD license style. |
+// | |
+// | Redistribution and use in source and binary forms, with or without |
+// | modification, are permitted provided that the following conditions |
+// | are met: |
+// | |
+// | Redistributions of source code must retain the above copyright |
+// | notice, this list of conditions and the following disclaimer. |
+// | |
+// | Redistributions in binary form must reproduce the above copyright |
+// | notice, this list of conditions and the following disclaimer in the |
+// | documentation and/or other materials provided with the distribution. |
+// | |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission. |
+// | |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
+// | POSSIBILITY OF SUCH DAMAGE. |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org> |
+// +----------------------------------------------------------------------+
+//
+// $Id$
+//
+
+/**
+ * @package MDB2
+ * @category Database
+ * @author Lukas Smith <smith@pooteeweet.org>
+ */
+
+require_once 'PEAR.php';
+
+/**
+ * The method mapErrorCode in each MDB2_dbtype implementation maps
+ * native error codes to one of these.
+ *
+ * If you add an error code here, make sure you also add a textual
+ * version of it in MDB2::errorMessage().
+ */
+
+define('MDB2_OK', 1);
+define('MDB2_ERROR', -1);
+define('MDB2_ERROR_SYNTAX', -2);
+define('MDB2_ERROR_CONSTRAINT', -3);
+define('MDB2_ERROR_NOT_FOUND', -4);
+define('MDB2_ERROR_ALREADY_EXISTS', -5);
+define('MDB2_ERROR_UNSUPPORTED', -6);
+define('MDB2_ERROR_MISMATCH', -7);
+define('MDB2_ERROR_INVALID', -8);
+define('MDB2_ERROR_NOT_CAPABLE', -9);
+define('MDB2_ERROR_TRUNCATED', -10);
+define('MDB2_ERROR_INVALID_NUMBER', -11);
+define('MDB2_ERROR_INVALID_DATE', -12);
+define('MDB2_ERROR_DIVZERO', -13);
+define('MDB2_ERROR_NODBSELECTED', -14);
+define('MDB2_ERROR_CANNOT_CREATE', -15);
+define('MDB2_ERROR_CANNOT_DELETE', -16);
+define('MDB2_ERROR_CANNOT_DROP', -17);
+define('MDB2_ERROR_NOSUCHTABLE', -18);
+define('MDB2_ERROR_NOSUCHFIELD', -19);
+define('MDB2_ERROR_NEED_MORE_DATA', -20);
+define('MDB2_ERROR_NOT_LOCKED', -21);
+define('MDB2_ERROR_VALUE_COUNT_ON_ROW', -22);
+define('MDB2_ERROR_INVALID_DSN', -23);
+define('MDB2_ERROR_CONNECT_FAILED', -24);
+define('MDB2_ERROR_EXTENSION_NOT_FOUND',-25);
+define('MDB2_ERROR_NOSUCHDB', -26);
+define('MDB2_ERROR_ACCESS_VIOLATION', -27);
+define('MDB2_ERROR_CANNOT_REPLACE', -28);
+define('MDB2_ERROR_CONSTRAINT_NOT_NULL',-29);
+define('MDB2_ERROR_DEADLOCK', -30);
+define('MDB2_ERROR_CANNOT_ALTER', -31);
+define('MDB2_ERROR_MANAGER', -32);
+define('MDB2_ERROR_MANAGER_PARSE', -33);
+define('MDB2_ERROR_LOADMODULE', -34);
+define('MDB2_ERROR_INSUFFICIENT_DATA', -35);
+
+/**
+ * This is a special constant that tells MDB2 the user hasn't specified
+ * any particular get mode, so the default should be used.
+ */
+
+define('MDB2_FETCHMODE_DEFAULT', 0);
+
+/**
+ * Column data indexed by numbers, ordered from 0 and up
+ */
+
+define('MDB2_FETCHMODE_ORDERED', 1);
+
+/**
+ * Column data indexed by column names
+ */
+
+define('MDB2_FETCHMODE_ASSOC', 2);
+
+/**
+ * Column data as object properties
+ */
+define('MDB2_FETCHMODE_OBJECT', 3);
+
+/**
+ * For multi-dimensional results: normally the first level of arrays
+ * is the row number, and the second level indexed by column number or name.
+ * MDB2_FETCHMODE_FLIPPED switches this order, so the first level of arrays
+ * is the column name, and the second level the row number.
+ */
+
+define('MDB2_FETCHMODE_FLIPPED', 4);
+
+// }}}
+// {{{ portability modes
+
+
+/**
+ * Portability: turn off all portability features.
+ * @see MDB2_Driver_Common::setOption()
+ */
+define('MDB2_PORTABILITY_NONE', 0);
+
+/**
+ * Portability: convert names of tables and fields to case defined in the
+ * "field_case" option when using the query*(), fetch*() and tableInfo() methods.
+ * @see MDB2_Driver_Common::setOption()
+ */
+define('MDB2_PORTABILITY_FIX_CASE', 1);
+
+/**
+ * Portability: right trim the data output by query*() and fetch*().
+ * @see MDB2_Driver_Common::setOption()
+ */
+define('MDB2_PORTABILITY_RTRIM', 2);
+
+/**
+ * Portability: force reporting the number of rows deleted.
+ * @see MDB2_Driver_Common::setOption()
+ */
+define('MDB2_PORTABILITY_DELETE_COUNT', 4);
+
+/**
+ * Portability: not needed in MDB2 (just left here for compatibility to DB)
+ * @see MDB2_Driver_Common::setOption()
+ */
+define('MDB2_PORTABILITY_NUMROWS', 8);
+
+/**
+ * Portability: makes certain error messages in certain drivers compatible
+ * with those from other DBMS's.
+ *
+ * + mysql, mysqli: change unique/primary key constraints
+ * MDB2_ERROR_ALREADY_EXISTS -> MDB2_ERROR_CONSTRAINT
+ *
+ * + odbc(access): MS's ODBC driver reports 'no such field' as code
+ * 07001, which means 'too few parameters.' When this option is on
+ * that code gets mapped to MDB2_ERROR_NOSUCHFIELD.
+ *
+ * @see MDB2_Driver_Common::setOption()
+ */
+define('MDB2_PORTABILITY_ERRORS', 16);
+
+/**
+ * Portability: convert empty values to null strings in data output by
+ * query*() and fetch*().
+ * @see MDB2_Driver_Common::setOption()
+ */
+define('MDB2_PORTABILITY_EMPTY_TO_NULL', 32);
+
+/**
+ * Portability: removes database/table qualifiers from associative indexes
+ * @see MDB2_Driver_Common::setOption()
+ */
+define('MDB2_PORTABILITY_FIX_ASSOC_FIELD_NAMES', 64);
+
+/**
+ * Portability: turn on all portability features.
+ * @see MDB2_Driver_Common::setOption()
+ */
+define('MDB2_PORTABILITY_ALL', 127);
+
+/**
+ * These are global variables that are used to track the various class instances
+ */
+
+$GLOBALS['_MDB2_databases'] = array();
+$GLOBALS['_MDB2_dsninfo_default'] = array(
+ 'phptype' => false,
+ 'dbsyntax' => false,
+ 'username' => false,
+ 'password' => false,
+ 'protocol' => false,
+ 'hostspec' => false,
+ 'port' => false,
+ 'socket' => false,
+ 'database' => false,
+ 'mode' => false,
+);
+
+/**
+ * The main 'MDB2' class is simply a container class with some static
+ * methods for creating DB objects as well as some utility functions
+ * common to all parts of DB.
+ *
+ * The object model of MDB2 is as follows (indentation means inheritance):
+ *
+ * MDB2 The main MDB2 class. This is simply a utility class
+ * with some 'static' methods for creating MDB2 objects as
+ * well as common utility functions for other MDB2 classes.
+ *
+ * MDB2_Driver_Common The base for each MDB2 implementation. Provides default
+ * | implementations (in OO lingo virtual methods) for
+ * | the actual DB implementations as well as a bunch of
+ * | query utility functions.
+ * |
+ * +-MDB2_mysql The MDB2 implementation for MySQL. Inherits MDB2_Driver_Common.
+ * When calling MDB2::factory or MDB2::connect for MySQL
+ * connections, the object returned is an instance of this
+ * class.
+ * +-MDB2_pgsql The MDB2 implementation for PostGreSQL. Inherits MDB2_Driver_Common.
+ * When calling MDB2::factory or MDB2::connect for PostGreSQL
+ * connections, the object returned is an instance of this
+ * class.
+ *
+ * MDB2_Date This class provides several method to convert from and to
+ * MDB2 timestamps.
+ *
+ * @package MDB2
+ * @category Database
+ * @author Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2
+{
+ // }}}
+ // {{{ setOptions()
+
+ /**
+ * set option array in an exiting database object
+ *
+ * @param object $db MDB2 object
+ * @param array $options An associative array of option names and their values.
+ * @access public
+ */
+ function setOptions(&$db, $options)
+ {
+ if (is_array($options)) {
+ foreach ($options as $option => $value) {
+ $test = $db->setOption($option, $value);
+ if (PEAR::isError($test)) {
+ return $test;
+ }
+ }
+ }
+
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ factory()
+
+ /**
+ * Create a new MDB2 object for the specified database type
+ *
+ * IMPORTANT: In order for MDB2 to work properly it is necessary that
+ * you make sure that you work with a reference of the original
+ * object instead of a copy (this is a PHP4 quirk).
+ *
+ * For example:
+ * $db =& MDB2::factory($dsn);
+ * ^^
+ * And not:
+ * $db = MDB2::factory($dsn);
+ *
+ * @param mixed $dsn 'data source name', see the MDB2::parseDSN
+ * method for a description of the dsn format.
+ * Can also be specified as an array of the
+ * format returned by MDB2::parseDSN.
+ * @param array $options An associative array of option names and
+ * their values.
+ * @return mixed a newly created MDB2 object, or false on error
+ * @access public
+ */
+ function &factory($dsn, $options = false)
+ {
+ $dsninfo = MDB2::parseDSN($dsn);
+ if (!array_key_exists('phptype', $dsninfo)) {
+ $err =& MDB2::raiseError(MDB2_ERROR_NOT_FOUND,
+ null, null, 'no RDBMS driver specified');
+ return $err;
+ }
+ $class_name = 'MDB2_Driver_'.$dsninfo['phptype'];
+
+ if (!class_exists($class_name)) {
+ $file_name = str_replace('_', DIRECTORY_SEPARATOR, $class_name).'.php';
+ if (!MDB2::fileExists($file_name)) {
+ $err =& MDB2::raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+ 'unable to find: '.$file_name);
+ return $err;
+ }
+ if (!include_once($file_name)) {
+ $err =& MDB2::raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+ 'unable to load driver class: '.$file_name);
+ return $err;
+ }
+ }
+
+ $db =& new $class_name();
+ $db->setDSN($dsninfo);
+ $err = MDB2::setOptions($db, $options);
+ if (PEAR::isError($err)) {
+ return $err;
+ }
+
+ return $db;
+ }
+
+ // }}}
+ // {{{ connect()
+
+ /**
+ * Create a new MDB2 connection object and connect to the specified
+ * database
+ *
+ * IMPORTANT: In order for MDB2 to work properly it is necessary that
+ * you make sure that you work with a reference of the original
+ * object instead of a copy (this is a PHP4 quirk).
+ *
+ * For example:
+ * $db =& MDB2::connect($dsn);
+ * ^^
+ * And not:
+ * $db = MDB2::connect($dsn);
+ * ^^
+ *
+ * @param mixed $dsn 'data source name', see the MDB2::parseDSN
+ * method for a description of the dsn format.
+ * Can also be specified as an array of the
+ * format returned by MDB2::parseDSN.
+ * @param array $options An associative array of option names and
+ * their values.
+ * @return mixed a newly created MDB2 connection object, or a MDB2
+ * error object on error
+ * @access public
+ * @see MDB2::parseDSN
+ */
+ function &connect($dsn, $options = false)
+ {
+ $db =& MDB2::factory($dsn, $options);
+ if (PEAR::isError($db)) {
+ return $db;
+ }
+
+ $err = $db->connect();
+ if (PEAR::isError($err)) {
+ $dsn = $db->getDSN('string', 'xxx');
+ $db->disconnect();
+ $err->addUserInfo($dsn);
+ return $err;
+ }
+
+ return $db;
+ }
+
+ // }}}
+ // {{{ singleton()
+
+ /**
+ * Returns a MDB2 connection with the requested DSN.
+ * A newnew MDB2 connection object is only created if no object with the
+ * reuested DSN exists yet.
+ *
+ * IMPORTANT: In order for MDB2 to work properly it is necessary that
+ * you make sure that you work with a reference of the original
+ * object instead of a copy (this is a PHP4 quirk).
+ *
+ * For example:
+ * $db =& MDB2::singleton($dsn);
+ * ^^
+ * And not:
+ * $db = MDB2::singleton($dsn);
+ * ^^
+ *
+ * @param mixed $dsn 'data source name', see the MDB2::parseDSN
+ * method for a description of the dsn format.
+ * Can also be specified as an array of the
+ * format returned by MDB2::parseDSN.
+ * @param array $options An associative array of option names and
+ * their values.
+ * @return mixed a newly created MDB2 connection object, or a MDB2
+ * error object on error
+ * @access public
+ * @see MDB2::parseDSN
+ */
+ function &singleton($dsn = null, $options = false)
+ {
+ if ($dsn) {
+ $dsninfo = MDB2::parseDSN($dsn);
+ $dsninfo = array_merge($GLOBALS['_MDB2_dsninfo_default'], $dsninfo);
+ $keys = array_keys($GLOBALS['_MDB2_databases']);
+ for ($i=0, $j=count($keys); $i<$j; ++$i) {
+ $tmp_dsn = $GLOBALS['_MDB2_databases'][$keys[$i]]->getDSN('array');
+ if (count(array_diff($tmp_dsn, $dsninfo)) == 0) {
+ MDB2::setOptions($GLOBALS['_MDB2_databases'][$keys[$i]], $options);
+ return $GLOBALS['_MDB2_databases'][$keys[$i]];
+ }
+ }
+ } elseif (is_array($GLOBALS['_MDB2_databases']) && reset($GLOBALS['_MDB2_databases'])) {
+ $db =& $GLOBALS['_MDB2_databases'][key($GLOBALS['_MDB2_databases'])];
+ return $db;
+ }
+ $db =& MDB2::factory($dsn, $options);
+ return $db;
+ }
+
+ // }}}
+ // {{{ loadFile()
+
+ /**
+ * load a file (like 'Date')
+ *
+ * @param string $file name of the file in the MDB2 directory (without '.php')
+ * @return string name of the file that was included
+ * @access public
+ */
+ function loadFile($file)
+ {
+ $file_name = 'MDB2'.DIRECTORY_SEPARATOR.$file.'.php';
+ if (!MDB2::fileExists($file_name)) {
+ return MDB2::raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+ 'unable to find: '.$file_name);
+ }
+ if (!include_once($file_name)) {
+ return MDB2::raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+ 'unable to load driver class: '.$file_name);
+ }
+ return $file_name;
+ }
+
+ // }}}
+ // {{{ apiVersion()
+
+ /**
+ * Return the MDB2 API version
+ *
+ * @return string the MDB2 API version number
+ * @access public
+ */
+ function apiVersion()
+ {
+ return '@package_version@';
+ }
+
+ // }}}
+ // {{{ raiseError()
+
+ /**
+ * This method is used to communicate an error and invoke error
+ * callbacks etc. Basically a wrapper for PEAR::raiseError
+ * without the message string.
+ *
+ * @param mixed integer error code
+ *
+ * @param int error mode, see PEAR_Error docs
+ *
+ * @param mixed If error mode is PEAR_ERROR_TRIGGER, this is the
+ * error level (E_USER_NOTICE etc). If error mode is
+ * PEAR_ERROR_CALLBACK, this is the callback function,
+ * either as a function name, or as an array of an
+ * object and method name. For other error modes this
+ * parameter is ignored.
+ *
+ * @param string Extra debug information. Defaults to the last
+ * query and native error code.
+ *
+ * @return object a PEAR error object
+ *
+ * @see PEAR_Error
+ */
+ function &raiseError($code = null, $mode = null, $options = null, $userinfo = null)
+ {
+ $err =& PEAR::raiseError(null, $code, $mode, $options, $userinfo, 'MDB2_Error', true);
+ return $err;
+ }
+
+ // }}}
+ // {{{ isError()
+
+ /**
+ * Tell whether a value is a MDB2 error.
+ *
+ * @param mixed $data the value to test
+ * @param int $code if $data is an error object, return true
+ * only if $code is a string and
+ * $db->getMessage() == $code or
+ * $code is an integer and $db->getCode() == $code
+ * @access public
+ * @return bool true if parameter is an error
+ */
+ function isError($data, $code = null)
+ {
+ if (is_a($data, 'MDB2_Error')) {
+ if (is_null($code)) {
+ return true;
+ } elseif (is_string($code)) {
+ return $data->getMessage() === $code;
+ } else {
+ $code = (array)$code;
+ return in_array($data->getCode(), $code);
+ }
+ }
+ return false;
+ }
+
+ // }}}
+ // {{{ isConnection()
+ /**
+ * Tell whether a value is a MDB2 connection
+ *
+ * @param mixed $value value to test
+ * @return bool whether $value is a MDB2 connection
+ * @access public
+ */
+ function isConnection($value)
+ {
+ return is_a($value, 'MDB2_Driver_Common');
+ }
+
+ // }}}
+ // {{{ isResult()
+ /**
+ * Tell whether a value is a MDB2 result
+ *
+ * @param mixed $value value to test
+ * @return bool whether $value is a MDB2 result
+ * @access public
+ */
+ function isResult($value)
+ {
+ return is_a($value, 'MDB2_Result');
+ }
+
+ // }}}
+ // {{{ isResultCommon()
+ /**
+ * Tell whether a value is a MDB2 result implementing the common interface
+ *
+ * @param mixed $value value to test
+ * @return bool whether $value is a MDB2 result implementing the common interface
+ * @access public
+ */
+ function isResultCommon($value)
+ {
+ return is_a($value, 'MDB2_Result_Common');
+ }
+
+ // }}}
+ // {{{ isStatement()
+ /**
+ * Tell whether a value is a MDB2 statement interface
+ *
+ * @param mixed $value value to test
+ * @return bool whether $value is a MDB2 statement interface
+ * @access public
+ */
+ function isStatement($value)
+ {
+ return is_a($value, 'MDB2_Statement');
+ }
+
+ // }}}
+ // {{{ isManip()
+
+ /**
+ * Tell whether a query is a data manipulation query (insert,
+ * update or delete) or a data definition query (create, drop,
+ * alter, grant, revoke).
+ *
+ * @param string $query the query
+ * @return boolean whether $query is a data manipulation query
+ * @access public
+ */
+ function isManip($query)
+ {
+ $manips = 'INSERT|UPDATE|DELETE|REPLACE|'
+ . 'CREATE|DROP|'
+ . 'LOAD DATA|SELECT .* INTO|COPY|'
+ . 'ALTER|GRANT|REVOKE|SET|'
+ . 'LOCK|UNLOCK';
+ if (preg_match('/^\s*"?('.$manips.')\s+/i', $query)) {
+ return true;
+ }
+ return false;
+ }
+
+ // }}}
+ // {{{ errorMessage()
+
+ /**
+ * Return a textual error message for a MDB2 error code
+ *
+ * @param int $value error code
+ * @return string error message, or false if the error code was
+ * not recognized
+ * @access public
+ */
+ function errorMessage($value)
+ {
+ static $errorMessages;
+ if (!isset($errorMessages)) {
+ $errorMessages = array(
+ MDB2_ERROR => 'unknown error',
+ MDB2_ERROR_ALREADY_EXISTS => 'already exists',
+ MDB2_ERROR_CANNOT_CREATE => 'can not create',
+ MDB2_ERROR_CANNOT_ALTER => 'can not alter',
+ MDB2_ERROR_CANNOT_REPLACE => 'can not replace',
+ MDB2_ERROR_CANNOT_DELETE => 'can not delete',
+ MDB2_ERROR_CANNOT_DROP => 'can not drop',
+ MDB2_ERROR_CONSTRAINT => 'constraint violation',
+ MDB2_ERROR_CONSTRAINT_NOT_NULL=> 'null value violates not-null constraint',
+ MDB2_ERROR_DIVZERO => 'division by zero',
+ MDB2_ERROR_INVALID => 'invalid',
+ MDB2_ERROR_INVALID_DATE => 'invalid date or time',
+ MDB2_ERROR_INVALID_NUMBER => 'invalid number',
+ MDB2_ERROR_MISMATCH => 'mismatch',
+ MDB2_ERROR_NODBSELECTED => 'no database selected',
+ MDB2_ERROR_NOSUCHFIELD => 'no such field',
+ MDB2_ERROR_NOSUCHTABLE => 'no such table',
+ MDB2_ERROR_NOT_CAPABLE => 'MDB2 backend not capable',
+ MDB2_ERROR_NOT_FOUND => 'not found',
+ MDB2_ERROR_NOT_LOCKED => 'not locked',
+ MDB2_ERROR_SYNTAX => 'syntax error',
+ MDB2_ERROR_UNSUPPORTED => 'not supported',
+ MDB2_ERROR_VALUE_COUNT_ON_ROW => 'value count on row',
+ MDB2_ERROR_INVALID_DSN => 'invalid DSN',
+ MDB2_ERROR_CONNECT_FAILED => 'connect failed',
+ MDB2_OK => 'no error',
+ MDB2_ERROR_NEED_MORE_DATA => 'insufficient data supplied',
+ MDB2_ERROR_EXTENSION_NOT_FOUND=> 'extension not found',
+ MDB2_ERROR_NOSUCHDB => 'no such database',
+ MDB2_ERROR_ACCESS_VIOLATION => 'insufficient permissions',
+ MDB2_ERROR_LOADMODULE => 'error while including on demand module',
+ MDB2_ERROR_TRUNCATED => 'truncated',
+ MDB2_ERROR_DEADLOCK => 'deadlock detected',
+ );
+ }
+
+ if (PEAR::isError($value)) {
+ $value = $value->getCode();
+ }
+
+ return isset($errorMessages[$value]) ?
+ $errorMessages[$value] : $errorMessages[MDB2_ERROR];
+ }
+
+ // }}}
+ // {{{ parseDSN()
+
+ /**
+ * Parse a data source name.
+ *
+ * Additional keys can be added by appending a URI query string to the
+ * end of the DSN.
+ *
+ * The format of the supplied DSN is in its fullest form:
+ * <code>
+ * phptype(dbsyntax)://username:password@protocol+hostspec/database?option=8&another=true
+ * </code>
+ *
+ * Most variations are allowed:
+ * <code>
+ * phptype://username:password@protocol+hostspec:110//usr/db_file.db?mode=0644
+ * phptype://username:password@hostspec/database_name
+ * phptype://username:password@hostspec
+ * phptype://username@hostspec
+ * phptype://hostspec/database
+ * phptype://hostspec
+ * phptype(dbsyntax)
+ * phptype
+ * </code>
+ *
+ * @param string $dsn Data Source Name to be parsed
+ *
+ * @return array an associative array with the following keys:
+ * + phptype: Database backend used in PHP (mysql, odbc etc.)
+ * + dbsyntax: Database used with regards to SQL syntax etc.
+ * + protocol: Communication protocol to use (tcp, unix etc.)
+ * + hostspec: Host specification (hostname[:port])
+ * + database: Database to use on the DBMS server
+ * + username: User name for login
+ * + password: Password for login
+ *
+ * @author Tomas V.V.Cox <cox@idecnet.com>
+ */
+ function parseDSN($dsn)
+ {
+ $parsed = $GLOBALS['_MDB2_dsninfo_default'];
+
+ if (is_array($dsn)) {
+ $dsn = array_merge($parsed, $dsn);
+ if (!$dsn['dbsyntax']) {
+ $dsn['dbsyntax'] = $dsn['phptype'];
+ }
+ return $dsn;
+ }
+
+ // Find phptype and dbsyntax
+ if (($pos = strpos($dsn, '://')) !== false) {
+ $str = substr($dsn, 0, $pos);
+ $dsn = substr($dsn, $pos + 3);
+ } else {
+ $str = $dsn;
+ $dsn = null;
+ }
+
+ // Get phptype and dbsyntax
+ // $str => phptype(dbsyntax)
+ if (preg_match('|^(.+?)\((.*?)\)$|', $str, $arr)) {
+ $parsed['phptype'] = $arr[1];
+ $parsed['dbsyntax'] = !$arr[2] ? $arr[1] : $arr[2];
+ } else {
+ $parsed['phptype'] = $str;
+ $parsed['dbsyntax'] = $str;
+ }
+
+ if (!count($dsn)) {
+ return $parsed;
+ }
+
+ // Get (if found): username and password
+ // $dsn => username:password@protocol+hostspec/database
+ if (($at = strrpos($dsn,'@')) !== false) {
+ $str = substr($dsn, 0, $at);
+ $dsn = substr($dsn, $at + 1);
+ if (($pos = strpos($str, ':')) !== false) {
+ $parsed['username'] = rawurldecode(substr($str, 0, $pos));
+ $parsed['password'] = rawurldecode(substr($str, $pos + 1));
+ } else {
+ $parsed['username'] = rawurldecode($str);
+ }
+ }
+
+ // Find protocol and hostspec
+
+ // $dsn => proto(proto_opts)/database
+ if (preg_match('|^([^(]+)\((.*?)\)/?(.*?)$|', $dsn, $match)) {
+ $proto = $match[1];
+ $proto_opts = $match[2] ? $match[2] : false;
+ $dsn = $match[3];
+
+ // $dsn => protocol+hostspec/database (old format)
+ } else {
+ if (strpos($dsn, '+') !== false) {
+ list($proto, $dsn) = explode('+', $dsn, 2);
+ }
+ if (strpos($dsn, '/') !== false) {
+ list($proto_opts, $dsn) = explode('/', $dsn, 2);
+ } else {
+ $proto_opts = $dsn;
+ $dsn = null;
+ }
+ }
+
+ // process the different protocol options
+ $parsed['protocol'] = (!empty($proto)) ? $proto : 'tcp';
+ $proto_opts = rawurldecode($proto_opts);
+ if ($parsed['protocol'] == 'tcp') {
+ if (strpos($proto_opts, ':') !== false) {
+ list($parsed['hostspec'], $parsed['port']) = explode(':', $proto_opts);
+ } else {
+ $parsed['hostspec'] = $proto_opts;
+ }
+ } elseif ($parsed['protocol'] == 'unix') {
+ $parsed['socket'] = $proto_opts;
+ }
+
+ // Get dabase if any
+ // $dsn => database
+ if ($dsn) {
+ // /database
+ if (($pos = strpos($dsn, '?')) === false) {
+ $parsed['database'] = $dsn;
+ // /database?param1=value1&param2=value2
+ } else {
+ $parsed['database'] = substr($dsn, 0, $pos);
+ $dsn = substr($dsn, $pos + 1);
+ if (strpos($dsn, '&') !== false) {
+ $opts = explode('&', $dsn);
+ } else { // database?param1=value1
+ $opts = array($dsn);
+ }
+ foreach ($opts as $opt) {
+ list($key, $value) = explode('=', $opt);
+ if (!isset($parsed[$key])) {
+ // don't allow params overwrite
+ $parsed[$key] = rawurldecode($value);
+ }
+ }
+ }
+ }
+
+ return $parsed;
+ }
+
+ // }}}
+ // {{{ fileExists()
+
+ /**
+ * checks if a file exists in the include path
+ *
+ * @access public
+ * @param string filename
+ *
+ * @return boolean true success and false on error
+ */
+ function fileExists($file)
+ {
+ $dirs = explode(PATH_SEPARATOR, ini_get('include_path'));
+ foreach ($dirs as $dir) {
+ if (is_readable($dir . DIRECTORY_SEPARATOR . $file)) {
+ return true;
+ }
+ }
+ return false;
+ }
+}
+
+/**
+ * MDB2_Error implements a class for reporting portable database error
+ * messages.
+ *
+ * @package MDB2
+ * @category Database
+ * @author Stig Bakken <ssb@fast.no>
+ */
+class MDB2_Error extends PEAR_Error
+{
+ // }}}
+ // {{{ constructor
+
+ /**
+ * MDB2_Error constructor.
+ *
+ * @param mixed $code MDB error code, or string with error message.
+ * @param integer $mode what 'error mode' to operate in
+ * @param integer $level what error level to use for
+ * $mode & PEAR_ERROR_TRIGGER
+ * @param smixed $debuginfo additional debug info, such as the last query
+ */
+ function MDB2_Error($code = MDB2_ERROR, $mode = PEAR_ERROR_RETURN,
+ $level = E_USER_NOTICE, $debuginfo = null)
+ {
+ $this->PEAR_Error('MDB2 Error: '.MDB2::errorMessage($code), $code,
+ $mode, $level, $debuginfo);
+ }
+}
+
+/**
+ * MDB2_Driver_Common: Base class that is extended by each MDB2 driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Driver_Common extends PEAR
+{
+ /**
+ * index of the MDB2 object within the $GLOBALS['_MDB2_databases'] array
+ * @var integer
+ * @access public
+ */
+ var $db_index = 0;
+
+ /**
+ * DSN used for the next query
+ * @var array
+ * @access protected
+ */
+ var $dsn = array();
+
+ /**
+ * DSN that was used to create the current connection
+ * @var array
+ * @access protected
+ */
+ var $connected_dsn = array();
+
+ /**
+ * connection resource
+ * @var mixed
+ * @access protected
+ */
+ var $connection = 0;
+
+ /**
+ * if the current opened connection is a persistent connection
+ * @var boolean
+ * @access protected
+ */
+ var $opened_persistent;
+
+ /**
+ * the name of the database for the next query
+ * @var string
+ * @access protected
+ */
+ var $database_name = '';
+
+ /**
+ * the name of the database currrently selected
+ * @var string
+ * @access protected
+ */
+ var $connected_database_name = '';
+
+ /**
+ * list of all supported features of the given driver
+ * @var array
+ * @access public
+ */
+ var $supported = array(
+ 'sequences' => false,
+ 'indexes' => false,
+ 'affected_rows' => false,
+ 'summary_functions' => false,
+ 'order_by_text' => false,
+ 'transactions' => false,
+ 'current_id' => false,
+ 'limit_queries' => false,
+ 'LOBs' => false,
+ 'replace' => false,
+ 'sub_selects' => false,
+ 'auto_increment' => false,
+ 'primary_key' => false,
+ );
+
+ /**
+ * $options['ssl'] -> determines if ssl should be used for connections
+ * $options['field_case'] -> determines what case to force on field/table names
+ * $options['disable_query'] -> determines if querys should be executed
+ * $options['result_class'] -> class used for result sets
+ * $options['buffered_result_class'] -> class used for buffered result sets
+ * $options['result_wrap_class'] -> class used to wrap result sets into
+ * $options['result_buffering'] -> boolean|integer should results be buffered or not?
+ * $options['fetch_class'] -> class to use when fetch mode object is used
+ * $options['persistent'] -> boolean persistent connection?
+ * $options['debug'] -> integer numeric debug level
+ * $options['debug_handler'] -> string function/meothd that captures debug messages
+ * $options['lob_buffer_length'] -> integer LOB buffer length
+ * $options['log_line_break'] -> string line-break format
+ * $options['seqname_format'] -> string pattern for sequence name
+ * $options['seqcol_name'] -> string sequence column name
+ * $options['use_transactions'] -> boolean
+ * $options['decimal_places'] -> integer
+ * $options['portability'] -> portability constant
+ * $options['modules'] -> short to long module name mapping for __call()
+ * @var array
+ * @access public
+ */
+ var $options = array(
+ 'ssl' => false,
+ 'field_case' => CASE_LOWER,
+ 'disable_query' => false,
+ 'result_class' => 'MDB2_Result_%s',
+ 'buffered_result_class' => 'MDB2_BufferedResult_%s',
+ 'result_wrap_class' => false,
+ 'result_buffering' => true,
+ 'fetch_class' => 'stdClass',
+ 'persistent' => false,
+ 'debug' => 0,
+ 'debug_handler' => 'MDB2_defaultDebugOutput',
+ 'lob_buffer_length' => 8192,
+ 'log_line_break' => "\n",
+ 'seqname_format' => '%s_seq',
+ 'seqcol_name' => 'sequence',
+ 'use_transactions' => false,
+ 'decimal_places' => 2,
+ 'portability' => MDB2_PORTABILITY_ALL,
+ 'modules' => array(
+ 'ex' => 'Extended',
+ 'dt' => 'Datatype',
+ 'mg' => 'Manager',
+ 'rv' => 'Reverse',
+ 'na' => 'Native',
+ ),
+ );
+
+ /**
+ * escape character
+ * @var string
+ * @access protected
+ */
+ var $escape_quotes = '';
+
+ /**
+ * warnings
+ * @var array
+ * @access protected
+ */
+ var $warnings = array();
+
+ /**
+ * string with the debugging information
+ * @var string
+ * @access public
+ */
+ var $debug_output = '';
+
+ /**
+ * determine if there is an open transaction
+ * @var boolean
+ * @access protected
+ */
+ var $in_transaction = false;
+
+ /**
+ * result offset used in the next query
+ * @var integer
+ * @access protected
+ */
+ var $row_offset = 0;
+
+ /**
+ * result limit used in the next query
+ * @var integer
+ * @access protected
+ */
+ var $row_limit = 0;
+
+ /**
+ * Database backend used in PHP (mysql, odbc etc.)
+ * @var string
+ * @access protected
+ */
+ var $phptype;
+
+ /**
+ * Database used with regards to SQL syntax etc.
+ * @var string
+ * @access protected
+ */
+ var $dbsyntax;
+
+ /**
+ * the last query sent to the driver
+ * @var string
+ * @access public
+ */
+ var $last_query;
+
+ /**
+ * the default fetchmode used
+ * @var integer
+ * @access protected
+ */
+ var $fetchmode = MDB2_FETCHMODE_ORDERED;
+
+ /**
+ * array of module instances
+ * @var array
+ * @access protected
+ */
+ var $modules = array();
+
+ /**
+ * determines of the PHP4 destructor emulation has been enabled yet
+ * @var array
+ * @access protected
+ */
+ var $destructor_registered = true;
+
+ // }}}
+ // {{{ constructor
+
+ /**
+ * Constructor
+ */
+ function __construct()
+ {
+ end($GLOBALS['_MDB2_databases']);
+ $db_index = key($GLOBALS['_MDB2_databases']) + 1;
+ $GLOBALS['_MDB2_databases'][$db_index] = &$this;
+ $this->db_index = $db_index;
+ }
+
+ // }}}
+ // {{{ MDB2_Driver_Common
+
+ /**
+ * PHP 4 Constructor
+ */
+ function MDB2_Driver_Common()
+ {
+ $this->destructor_registered = false;
+ $this->__construct();
+ }
+
+ // }}}
+ // {{{ Destructor
+
+ /**
+ * Destructor
+ */
+ function __destruct()
+ {
+ if ($this->connection) {
+ if ($this->opened_persistent) {
+ if ($this->in_transaction) {
+ $this->rollback();
+ }
+ } else {
+ $this->disconnect();
+ }
+ }
+ }
+
+ // }}}
+ // {{{ free()
+
+ /**
+ * Free the internal references so that the instance can be destroyed
+ *
+ * @return boolean true on success, false if result is invalid
+ * @access public
+ */
+ function free()
+ {
+ unset($GLOBALS['_MDB2_databases'][$this->db_index]);
+ unset($this->db_index);
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ __toString()
+
+ /**
+ * String conversation
+ *
+ * @return string
+ * @access public
+ */
+ function __toString()
+ {
+ $info = get_class($this);
+ $info.= ': (phptype = '.$this->phptype.', dbsyntax = '.$this->dbsyntax.')';
+ if ($this->connection) {
+ $info.= ' [connected]';
+ }
+ return $info;
+ }
+
+ // }}}
+ // {{{ errorInfo()
+
+ /**
+ * This method is used to collect information about an error
+ *
+ * @param integer $error
+ * @return array
+ * @access public
+ */
+ function errorInfo($error = null)
+ {
+ return array($error, null, null);
+ }
+
+ // }}}
+ // {{{ raiseError()
+
+ /**
+ * This method is used to communicate an error and invoke error
+ * callbacks etc. Basically a wrapper for PEAR::raiseError
+ * without the message string.
+ *
+ * @param mixed integer error code, or a PEAR error object (all
+ * other parameters are ignored if this parameter is
+ * an object
+ *
+ * @param int error mode, see PEAR_Error docs
+ *
+ * @param mixed If error mode is PEAR_ERROR_TRIGGER, this is the
+ * error level (E_USER_NOTICE etc). If error mode is
+ * PEAR_ERROR_CALLBACK, this is the callback function,
+ * either as a function name, or as an array of an
+ * object and method name. For other error modes this
+ * parameter is ignored.
+ *
+ * @param string Extra debug information. Defaults to the last
+ * query and native error code.
+ *
+ * @return object a PEAR error object
+ *
+ * @see PEAR_Error
+ */
+ function &raiseError($code = null, $mode = null, $options = null, $userinfo = null)
+ {
+ // The error is yet a MDB2 error object
+ if (PEAR::isError($code)) {
+ // because we use the static PEAR::raiseError, our global
+ // handler should be used if it is set
+ if (is_null($mode) && !empty($this->_default_error_mode)) {
+ $mode = $this->_default_error_mode;
+ $options = $this->_default_error_options;
+ }
+ } else {
+ if (is_null($userinfo) && isset($this->connection)) {
+ if (!empty($this->last_query)) {
+ $userinfo = "[Last query: {$this->last_query}]\n";
+ }
+ $native_errno = $native_msg = null;
+ list($code, $native_errno, $native_msg) = $this->errorInfo($code);
+ if (!is_null($native_errno)) {
+ $userinfo.= "[Native code: $native_errno]\n";
+ }
+ if (!is_null($native_msg)) {
+ $userinfo.= "[Native message: ". strip_tags($native_msg) ."]\n";
+ }
+ } else {
+ $userinfo = "[Error message: $userinfo]\n";
+ }
+ }
+
+ $err =& PEAR::raiseError(null, $code, $mode, $options, $userinfo, 'MDB2_Error', true);
+ return $err;
+ }
+
+ // }}}
+ // {{{ errorNative()
+
+ /**
+ * returns an errormessage, provides by the database
+ *
+ * @return mixed MDB2 Error Object or message
+ * @access public
+ */
+ function errorNative()
+ {
+ return $this->raiseError(MDB2_ERROR_UNSUPPORTED);
+ }
+
+ // }}}
+ // {{{ resetWarnings()
+
+ /**
+ * reset the warning array
+ *
+ * @access public
+ */
+ function resetWarnings()
+ {
+ $this->warnings = array();
+ }
+
+ // }}}
+ // {{{ getWarnings()
+
+ /**
+ * get all warnings in reverse order.
+ * This means that the last warning is the first element in the array
+ *
+ * @return array with warnings
+ * @access public
+ * @see resetWarnings()
+ */
+ function getWarnings()
+ {
+ return array_reverse($this->warnings);
+ }
+
+ // }}}
+ // {{{ setFetchMode()
+
+ /**
+ * Sets which fetch mode should be used by default on queries
+ * on this connection
+ *
+ * @param integer $fetchmode MDB2_FETCHMODE_ORDERED, MDB2_FETCHMODE_ASSOC
+ * or MDB2_FETCHMODE_OBJECT
+ * @param string $object_class the class name of the object to be returned
+ * by the fetch methods when the
+ * MDB2_FETCHMODE_OBJECT mode is selected.
+ * If no class is specified by default a cast
+ * to object from the assoc array row will be
+ * done. There is also the posibility to use
+ * and extend the 'MDB2_row' class.
+ *
+ * @see MDB2_FETCHMODE_ORDERED, MDB2_FETCHMODE_ASSOC, MDB2_FETCHMODE_OBJECT
+ * @access public
+ */
+ function setFetchMode($fetchmode, $object_class = 'stdClass')
+ {
+ switch ($fetchmode) {
+ case MDB2_FETCHMODE_OBJECT:
+ $this->options['fetch_class'] = $object_class;
+ case MDB2_FETCHMODE_ORDERED:
+ case MDB2_FETCHMODE_ASSOC:
+ $this->fetchmode = $fetchmode;
+ break;
+ default:
+ return $this->raiseError('invalid fetchmode mode');
+ }
+ }
+
+ // }}}
+ // {{{ setOption()
+
+ /**
+ * set the option for the db class
+ *
+ * @param string $option option name
+ * @param mixed $value value for the option
+ * @return mixed MDB2_OK or MDB2 Error Object
+ * @access public
+ */
+ function setOption($option, $value)
+ {
+ if (array_key_exists($option, $this->options)) {
+ $this->options[$option] = $value;
+ return MDB2_OK;
+ }
+ return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ "unknown option $option");
+ }
+
+ // }}}
+ // {{{ getOption()
+
+ /**
+ * returns the value of an option
+ *
+ * @param string $option option name
+ * @return mixed the option value or error object
+ * @access public
+ */
+ function getOption($option)
+ {
+ if (array_key_exists($option, $this->options)) {
+ return $this->options[$option];
+ }
+ return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ "unknown option $option");
+ }
+
+ // }}}
+ // {{{ debug()
+
+ /**
+ * set a debug message
+ *
+ * @param string $message Message with information for the user.
+ * @access public
+ */
+ function debug($message, $scope = '')
+ {
+ if ($this->options['debug'] && $this->options['debug_handler']) {
+ call_user_func_array($this->options['debug_handler'], array(&$this, $scope, $message));
+ }
+ }
+
+ // }}}
+ // {{{ debugOutput()
+
+ /**
+ * output debug info
+ *
+ * @return string content of the debug_output class variable
+ * @access public
+ */
+ function debugOutput()
+ {
+ return $this->debug_output;
+ }
+
+ // }}}
+ // {{{ escape()
+
+ /**
+ * Quotes a string so it can be safely used in a query. It will quote
+ * the text so it can safely be used within a query.
+ *
+ * @param string $text the input string to quote
+ * @return string quoted string
+ * @access public
+ */
+ function escape($text)
+ {
+ if ($this->escape_quotes !== "'") {
+ $text = str_replace($this->escape_quotes, $this->escape_quotes.$this->escape_quotes, $text);
+ }
+ return str_replace("'", $this->escape_quotes . "'", $text);
+ }
+
+ // }}}
+ // {{{ quoteIdentifier()
+
+ /**
+ * Quote a string so it can be safely used as a table or column name
+ *
+ * Delimiting style depends on which database driver is being used.
+ *
+ * NOTE: just because you CAN use delimited identifiers doesn't mean
+ * you SHOULD use them. In general, they end up causing way more
+ * problems than they solve.
+ *
+ * Portability is broken by using the following characters inside
+ * delimited identifiers:
+ * + backtick (<kbd>`</kbd>) -- due to MySQL
+ * + double quote (<kbd>"</kbd>) -- due to Oracle
+ * + brackets (<kbd>[</kbd> or <kbd>]</kbd>) -- due to Access
+ *
+ * Delimited identifiers are known to generally work correctly under
+ * the following drivers:
+ * + mssql
+ * + mysql
+ * + mysqli
+ * + oci8
+ * + odbc(access)
+ * + odbc(db2)
+ * + pgsql
+ * + sqlite
+ * + sybase
+ *
+ * InterBase doesn't seem to be able to use delimited identifiers
+ * via PHP 4. They work fine under PHP 5.
+ *
+ * @param string $str identifier name to be quoted
+ *
+ * @return string quoted identifier string
+ *
+ * @access public
+ */
+ function quoteIdentifier($str)
+ {
+ return '"' . str_replace('"', '""', $str) . '"';
+ }
+
+ // }}}
+ // {{{ _fixResultArrayValues()
+
+ /**
+ * Do all necessary conversions on result arrays to fix DBMS quirks
+ *
+ * @param array $array the array to be fixed (passed by reference)
+ * @return void
+ * @access protected
+ */
+ function _fixResultArrayValues(&$array, $mode)
+ {
+ switch ($mode) {
+ case MDB2_PORTABILITY_RTRIM:
+ foreach ($array as $key => $value) {
+ if (is_string($value)) {
+ $array[$key] = rtrim($value);
+ }
+ }
+ case MDB2_PORTABILITY_EMPTY_TO_NULL:
+ foreach ($array as $key => $value) {
+ if ($value === '') {
+ $array[$key] = null;
+ }
+ }
+ case MDB2_PORTABILITY_FIX_ASSOC_FIELD_NAMES:
+ $tmp_array = array();
+ foreach ($array as $key => $value) {
+ $tmp_array[preg_replace('/^(?:.*\.)?([^.]+)$/', '\\1', $key)] = $value;
+ }
+ $array = $tmp_array;
+ case (MDB2_PORTABILITY_RTRIM + MDB2_PORTABILITY_EMPTY_TO_NULL):
+ foreach ($array as $key => $value) {
+ if ($value === '') {
+ $array[$key] = null;
+ } elseif (is_string($value)) {
+ $array[$key] = rtrim($value);
+ }
+ }
+ case (MDB2_PORTABILITY_RTRIM + MDB2_PORTABILITY_FIX_ASSOC_FIELD_NAMES):
+ $tmp_array = array();
+ foreach ($array as $key => $value) {
+ if (is_string($value)) {
+ $value = rtrim($value);
+ }
+ $tmp_array[preg_replace('/^(?:.*\.)?([^.]+)$/', '\\1', $key)] = $value;
+ }
+ $array = $tmp_array;
+ case (MDB2_PORTABILITY_EMPTY_TO_NULL + MDB2_PORTABILITY_FIX_ASSOC_FIELD_NAMES):
+ $tmp_array = array();
+ foreach ($array as $key => $value) {
+ if ($value === '') {
+ $value = null;
+ }
+ $tmp_array[preg_replace('/^(?:.*\.)?([^.]+)$/', '\\1', $key)] = $value;
+ }
+ $array = $tmp_array;
+ case (MDB2_PORTABILITY_RTRIM + MDB2_PORTABILITY_EMPTY_TO_NULL + MDB2_PORTABILITY_FIX_ASSOC_FIELD_NAMES):
+ $tmp_array = array();
+ foreach ($array as $key => $value) {
+ if ($value === '') {
+ $value = null;
+ } elseif (is_string($value)) {
+ $value = rtrim($value);
+ }
+ $tmp_array[preg_replace('/^(?:.*\.)?([^.]+)$/', '\\1', $key)] = $value;
+ }
+ $array = $tmp_array;
+ }
+ }
+
+ // }}}
+ // {{{ loadModule()
+
+ /**
+ * loads a module
+ *
+ * @param string $module name of the module that should be loaded
+ * (only used for error messages)
+ * @param string $property name of the property into which the class will be loaded
+ * @return object on success a reference to the given module is returned
+ * and on failure a PEAR error
+ * @access public
+ */
+ function &loadModule($module, $property = null)
+ {
+ if (!$property) {
+ $property = strtolower($module);
+ }
+
+ if (!isset($this->{$property})) {
+ $version = false;
+ $class_name = 'MDB2_'.$module;
+ $file_name = str_replace('_', DIRECTORY_SEPARATOR, $class_name).'.php';
+ if (!class_exists($class_name) && !MDB2::fileExists($file_name)) {
+ $class_name = 'MDB2_Driver_'.$module.'_'.$this->phptype;
+ $file_name = str_replace('_', DIRECTORY_SEPARATOR, $class_name).'.php';
+ $version = true;
+ if (!class_exists($class_name) && !MDB2::fileExists($file_name)) {
+ $err =& $this->raiseError(MDB2_ERROR_LOADMODULE, null, null,
+ 'unable to find module: '.$file_name);
+ return $err;
+ }
+ }
+
+ if (!class_exists($class_name) && !include_once($file_name)) {
+ $err =& $this->raiseError(MDB2_ERROR_LOADMODULE, null, null,
+ 'unable to load manager driver class: '.$file_name);
+ return $err;
+ }
+
+ // load modul in a specific version
+ if ($version) {
+ if (method_exists($class_name, 'getClassName')) {
+ $class_name_new = call_user_func(array($class_name, 'getClassName'), $this->db_index);
+ if ($class_name != $class_name_new) {
+ $class_name = $class_name_new;
+ $file_name = str_replace('_', DIRECTORY_SEPARATOR, $class_name).'.php';
+ if (!MDB2::fileExists($file_name)) {
+ $err =& $this->raiseError(MDB2_ERROR_LOADMODULE, null, null,
+ 'unable to find module: '.$file_name);
+ return $err;
+ }
+ if (!include_once($file_name)) {
+ $err =& $this->raiseError(MDB2_ERROR_LOADMODULE, null, null,
+ 'unable to load manager driver class: '.$file_name);
+ return $err;
+ }
+ }
+ }
+ }
+
+ if (!class_exists($class_name)) {
+ $err =& $this->raiseError(MDB2_ERROR_LOADMODULE, null, null,
+ 'unable to load module: '.$module.' into property: '.$property);
+ return $err;
+ }
+ $this->{$property} =& new $class_name($this->db_index);
+ $this->modules[$module] =& $this->{$property};
+ if ($version) {
+ // this wil be used in the connect method to determine if the module
+ // needs to be loaded with a different version if the server
+ // version changed in between connects
+ $this->loaded_version_modules[] = $property;
+ }
+ }
+
+ return $this->{$property};
+ }
+
+ /**
+ * Calls a module method using the __call magic method
+ *
+ * @param string Method name.
+ * @param array Arguments.
+ * @return mixed Returned value.
+ */
+ function __call($method, $params)
+ {
+ $module = null;
+ if (preg_match('/^([a-z]+)([A-Z])(.*)$/', $method, $match)
+ && isset($this->options['modules'][$match[1]])
+ ) {
+ $module = $this->options['modules'][$match[1]];
+ $method = strtolower($match[2]).$match[3];
+ if (!isset($this->modules[$module]) || !is_object($this->modules[$module])) {
+ $result =& $this->loadModule($module);
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+ }
+ } else {
+ foreach ($this->modules as $key => $foo) {
+ if (is_object($this->modules[$key])
+ && method_exists($this->modules[$key], $method)
+ ) {
+ $module = $key;
+ break;
+ }
+ }
+ }
+ if (!is_null($module)) {
+ return call_user_func_array(array(&$this->modules[$module], $method), $params);
+ }
+ trigger_error(sprintf('Call to undefined function: %s::%s().', get_class($this), $method), E_USER_ERROR);
+ }
+
+ // }}}
+ // {{{ beginTransaction()
+
+ /**
+ * Start a transaction.
+ *
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function beginTransaction()
+ {
+ $this->debug('Starting transaction', 'beginTransaction');
+ return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ 'beginTransaction: transactions are not supported');
+ }
+
+ // }}}
+ // {{{ commit()
+
+ /**
+ * Commit the database changes done during a transaction that is in
+ * progress. This function may only be called when auto-committing is
+ * disabled, otherwise it will fail. Therefore, a new transaction is
+ * implicitly started after committing the pending changes.
+ *
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function commit()
+ {
+ $this->debug('commiting transaction', 'commit');
+ return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ 'commit: commiting transactions is not supported');
+ }
+
+ // }}}
+ // {{{ rollback()
+
+ /**
+ * Cancel any database changes done during a transaction that is in
+ * progress. This function may only be called when auto-committing is
+ * disabled, otherwise it will fail. Therefore, a new transaction is
+ * implicitly started after canceling the pending changes.
+ *
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function rollback()
+ {
+ $this->debug('rolling back transaction', 'rollback');
+ return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ 'rollback: rolling back transactions is not supported');
+ }
+
+ // }}}
+ // {{{ disconnect()
+
+ /**
+ * Log out and disconnect from the database.
+ *
+ * @return mixed true on success, false if not connected and error
+ * object on error
+ * @access public
+ */
+ function disconnect()
+ {
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ setDatabase()
+
+ /**
+ * Select a different database
+ *
+ * @param string $name name of the database that should be selected
+ * @return string name of the database previously connected to
+ * @access public
+ */
+ function setDatabase($name)
+ {
+ $previous_database_name = (isset($this->database_name)) ? $this->database_name : '';
+ $this->database_name = $name;
+ return $previous_database_name;
+ }
+
+ // }}}
+ // {{{ getDatabase()
+
+ /**
+ * get the current database
+ *
+ * @return string name of the database
+ * @access public
+ */
+ function getDatabase()
+ {
+ return $this->database_name;
+ }
+
+ // }}}
+ // {{{ setDSN()
+
+ /**
+ * set the DSN
+ *
+ * @param mixed $dsn DSN string or array
+ * @return MDB2_OK
+ * @access public
+ */
+ function setDSN($dsn)
+ {
+ $dsn_default = $GLOBALS['_MDB2_dsninfo_default'];
+ $dsn = MDB2::parseDSN($dsn);
+ if (array_key_exists('database', $dsn)) {
+ $this->database_name = $dsn['database'];
+ unset($dsn['database']);
+ }
+ $this->dsn = array_merge($dsn_default, $dsn);
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ getDSN()
+
+ /**
+ * return the DSN as a string
+ *
+ * @param string $type format to return ("array", "string")
+ * @param string $hidepw string to hide the password with
+ * @return mixed DSN in the chosen type
+ * @access public
+ */
+ function getDSN($type = 'string', $hidepw = false)
+ {
+ $dsn = array_merge($GLOBALS['_MDB2_dsninfo_default'], $this->dsn);
+ $dsn['phptype'] = $this->phptype;
+ $dsn['database'] = $this->database_name;
+ if ($hidepw) {
+ $dsn['password'] = $hidepw;
+ }
+ switch ($type) {
+ // expand to include all possible options
+ case 'string':
+ $dsn = $dsn['phptype'].'://'.$dsn['username'].':'.
+ $dsn['password'].'@'.$dsn['hostspec'].
+ ($dsn['port'] ? (':'.$dsn['port']) : '').
+ '/'.$dsn['database'];
+ break;
+ case 'array':
+ default:
+ break;
+ }
+ return $dsn;
+ }
+
+ // }}}
+ // {{{ standaloneQuery()
+
+ /**
+ * execute a query as database administrator
+ *
+ * @param string $query the SQL query
+ * @param mixed $types array that contains the types of the columns in
+ * the result set
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function &standaloneQuery($query, $types = null)
+ {
+ $isManip = MDB2::isManip($query);
+ $offset = $this->row_offset;
+ $limit = $this->row_limit;
+ $this->row_offset = $this->row_limit = 0;
+ $query = $this->_modifyQuery($query, $isManip, $limit, $offset);
+
+ $connected = $this->connect();
+ if (PEAR::isError($connected)) {
+ return $connected;
+ }
+
+ $result = $this->_doQuery($query, $isManip, $this->connection, false);
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+
+ if ($isManip) {
+ return $result;
+ }
+
+ $result =& $this->_wrapResult($result, $types, true, false, $limit, $offset);
+ return $result;
+ }
+
+ // }}}
+ // {{{ _modifyQuery()
+
+ /**
+ * Changes a query string for various DBMS specific reasons
+ *
+ * @param string $query query to modify
+ * @return the new (modified) query
+ * @access protected
+ */
+ function _modifyQuery($query)
+ {
+ return $query;
+ }
+
+ // }}}
+ // {{{ _doQuery()
+
+ /**
+ * Execute a query
+ * @param string $query query
+ * @param boolean $isManip if the query is a manipulation query
+ * @param resource $connection
+ * @param string $database_name
+ * @return result or error object
+ * @access protected
+ */
+ function _doQuery($query, $isManip = false, $connection = null, $database_name = null)
+ {
+ $this->last_query = $query;
+ $this->debug($query, 'query');
+ return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ 'query: method not implemented');
+ }
+
+ // }}}
+ // {{{ query()
+
+ /**
+ * Send a query to the database and return any results
+ *
+ * @param string $query the SQL query
+ * @param mixed $types array that contains the types of the columns in
+ * the result set
+ * @param mixed $result_class string which specifies which result class to use
+ * @param mixed $result_wrap_class string which specifies which class to wrap results in
+ * @return mixed a result handle or MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function &query($query, $types = null, $result_class = true, $result_wrap_class = false)
+ {
+ $isManip = MDB2::isManip($query);
+ $offset = $this->row_offset;
+ $limit = $this->row_limit;
+ $this->row_offset = $this->row_limit = 0;
+ $query = $this->_modifyQuery($query, $isManip, $limit, $offset);
+
+ $connected = $this->connect();
+ if (PEAR::isError($connected)) {
+ return $connected;
+ }
+
+ $result = $this->_doQuery($query, $isManip, $this->connection, $this->database_name);
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+
+ // check for integers instead of manip since drivers may do some
+ // custom checks not covered by MDB2::isManip()
+ if (is_int($result)) {
+ return $result;
+ }
+
+ $result =& $this->_wrapResult($result, $types, $result_class, $result_wrap_class, $limit, $offset);
+ return $result;
+ }
+
+ // }}}
+ // {{{ _wrapResult()
+
+ /**
+ * wrap a result set into the correct class
+ *
+ * @param ressource $result
+ * @param mixed $types array that contains the types of the columns in
+ * the result set
+ * @param mixed $result_class string which specifies which result class to use
+ * @param mixed $result_wrap_class string which specifies which class to wrap results in
+ * @param string $limit number of rows to select
+ * @param string $offset first row to select
+ * @return mixed a result handle or MDB2_OK on success, a MDB2 error on failure
+ * @access protected
+ */
+ function &_wrapResult($result, $types = array(), $result_class = true,
+ $result_wrap_class = false, $limit = null, $offset = null)
+ {
+ if ($result_class === true) {
+ $result_class = $this->options['result_buffering']
+ ? $this->options['buffered_result_class'] : $this->options['result_class'];
+ }
+
+ if ($result_class) {
+ $class_name = sprintf($result_class, $this->phptype);
+ if (!class_exists($class_name)) {
+ $err =& $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+ '_wrapResult: result class does not exist '.$class_name);
+ return $err;
+ }
+ $result =& new $class_name($this, $result, $limit, $offset);
+ if (!MDB2::isResultCommon($result)) {
+ $err =& $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+ '_wrapResult: result class is not extended from MDB2_Result_Common');
+ return $err;
+ }
+ if (!empty($types)) {
+ $err = $result->setResultTypes($types);
+ if (PEAR::isError($err)) {
+ $result->free();
+ return $err;
+ }
+ }
+ }
+ if ($result_wrap_class === true) {
+ $result_wrap_class = $this->options['result_wrap_class'];
+ }
+ if ($result_wrap_class) {
+ if (!class_exists($result_wrap_class)) {
+ $err =& $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+ '_wrapResult: result wrap class does not exist '.$result_wrap_class);
+ return $err;
+ }
+ $result =& new $result_wrap_class($result, $this->fetchmode);
+ }
+ return $result;
+ }
+
+ // }}}
+ // {{{ setLimit()
+
+ /**
+ * set the range of the next query
+ *
+ * @param string $limit number of rows to select
+ * @param string $offset first row to select
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function setLimit($limit, $offset = null)
+ {
+ if (!$this->supports('limit_queries')) {
+ return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ 'setLimit: limit is not supported by this driver');
+ }
+ $limit = (int)$limit;
+ if ($limit < 0) {
+ return $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
+ 'setLimit: it was not specified a valid selected range row limit');
+ }
+ $this->row_limit = $limit;
+ if (!is_null($offset)) {
+ $offset = (int)$offset;
+ if ($offset < 0) {
+ return $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
+ 'setLimit: it was not specified a valid first selected range row');
+ }
+ $this->row_offset = $offset;
+ }
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ subSelect()
+
+ /**
+ * simple subselect emulation: leaves the query untouched for all RDBMS
+ * that support subselects
+ *
+ * @access public
+ *
+ * @param string $query the SQL query for the subselect that may only
+ * return a column
+ * @param string $type determines type of the field
+ *
+ * @return string the query
+ */
+ function subSelect($query, $type = false)
+ {
+ if ($this->supports('sub_selects') === true) {
+ return $query;
+ }
+
+ if (!$this->supports('sub_selects')) {
+ return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ 'subSelect: method not implemented');
+ }
+
+ $col = $this->queryCol($query, $type);
+ if (PEAR::isError($col)) {
+ return $col;
+ }
+ if (!is_array($col) || count($col) == 0) {
+ return 'NULL';
+ }
+ if ($type) {
+ $this->loadModule('Datatype');
+ return $this->datatype->implodeArray($col, $type);
+ }
+ return implode(', ', $col);
+ }
+
+ // }}}
+ // {{{ replace()
+
+ /**
+ * Execute a SQL REPLACE query. A REPLACE query is identical to a INSERT
+ * query, except that if there is already a row in the table with the same
+ * key field values, the REPLACE query just updates its values instead of
+ * inserting a new row.
+ *
+ * The REPLACE type of query does not make part of the SQL standards. Since
+ * pratically only MySQL implements it natively, this type of query is
+ * emulated through this method for other DBMS using standard types of
+ * queries inside a transaction to assure the atomicity of the operation.
+ *
+ * @param string $table name of the table on which the REPLACE query will
+ * be executed.
+ * @param array $fields associative array that describes the fields and the
+ * values that will be inserted or updated in the specified table. The
+ * indexes of the array are the names of all the fields of the table.
+ * The values of the array are also associative arrays that describe
+ * the values and other properties of the table fields.
+ *
+ * Here follows a list of field properties that need to be specified:
+ *
+ * value
+ * Value to be assigned to the specified field. This value may be
+ * of specified in database independent type format as this
+ * function can perform the necessary datatype conversions.
+ *
+ * Default: this property is required unless the Null property is
+ * set to 1.
+ *
+ * type
+ * Name of the type of the field. Currently, all types Metabase
+ * are supported except for clob and blob.
+ *
+ * Default: no type conversion
+ *
+ * null
+ * Boolean property that indicates that the value for this field
+ * should be set to null.
+ *
+ * The default value for fields missing in INSERT queries may be
+ * specified the definition of a table. Often, the default value
+ * is already null, but since the REPLACE may be emulated using
+ * an UPDATE query, make sure that all fields of the table are
+ * listed in this function argument array.
+ *
+ * Default: 0
+ *
+ * key
+ * Boolean property that indicates that this field should be
+ * handled as a primary key or at least as part of the compound
+ * unique index of the table that will determine the row that will
+ * updated if it exists or inserted a new row otherwise.
+ *
+ * This function will fail if no key field is specified or if the
+ * value of a key field is set to null because fields that are
+ * part of unique index they may not be null.
+ *
+ * Default: 0
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function replace($table, $fields)
+ {
+ if (!$this->supports('replace')) {
+ return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ 'replace: replace query is not supported');
+ }
+ $count = count($fields);
+ $condition = $values = array();
+ for ($colnum = 0, reset($fields); $colnum < $count; next($fields), $colnum++) {
+ $name = key($fields);
+ if (isset($fields[$name]['null']) && $fields[$name]['null']) {
+ $value = 'NULL';
+ } else {
+ if (isset($fields[$name]['type'])) {
+ $value = $this->quote($fields[$name]['value'], $fields[$name]['type']);
+ } else {
+ $value = $fields[$name]['value'];
+ }
+ }
+ $values[$name] = $value;
+ if (isset($fields[$name]['key']) && $fields[$name]['key']) {
+ if ($value === 'NULL') {
+ return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
+ 'replace: key value '.$name.' may not be NULL');
+ }
+ $condition[] = $name . '=' . $value;
+ }
+ }
+ if (empty($condition)) {
+ return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
+ 'replace: not specified which fields are keys');
+ }
+
+ $result = null;
+ $in_transaction = $this->in_transaction;
+ if (!$in_transaction && PEAR::isError($result = $this->beginTransaction())) {
+ return $result;
+ }
+
+ $condition = ' WHERE '.implode(' AND ', $condition);
+ $query = "DELETE FROM $table$condition";
+ $affected_rows = $result = $this->_doQuery($query, true);
+ if (!PEAR::isError($result)) {
+ $insert = implode(', ', array_keys($values));
+ $values = implode(', ', $values);
+ $query = "INSERT INTO $table ($insert) VALUES ($values)";
+ $result = $this->_doQuery($query, true);
+ if (!PEAR::isError($result)) {
+ $affected_rows += $result;
+ }
+ }
+
+ if (!$in_transaction) {
+ if (PEAR::isError($result)) {
+ $this->rollback();
+ } else {
+ $result = $this->commit();
+ }
+ }
+
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+
+ return $affected_rows;
+ }
+
+ // }}}
+ // {{{ prepare()
+
+ /**
+ * Prepares a query for multiple execution with execute().
+ * With some database backends, this is emulated.
+ * prepare() requires a generic query as string like
+ * 'INSERT INTO numbers VALUES(?,?)' or
+ * 'INSERT INTO numbers VALUES(:foo,:bar)'.
+ * The ? and :[a-zA-Z] and are placeholders which can be set using
+ * bindParam() and the query can be send off using the execute() method.
+ *
+ * @param string $query the query to prepare
+ * @param mixed $types array that contains the types of the placeholders
+ * @param mixed $result_types array that contains the types of the columns in
+ * the result set
+ * @return mixed resource handle for the prepared query on success, a MDB2
+ * error on failure
+ * @access public
+ * @see bindParam, execute
+ */
+ function &prepare($query, $types = null, $result_types = null)
+ {
+ $this->debug($query, 'prepare');
+ $positions = array();
+ $placeholder_type_guess = $placeholder_type = null;
+ $question = '?';
+ $colon = ':';
+ $position = 0;
+ while ($position < strlen($query)) {
+ $q_position = strpos($query, $question, $position);
+ $c_position = strpos($query, $colon, $position);
+ if ($q_position && $c_position) {
+ $p_position = min($q_position, $c_position);
+ } elseif ($q_position) {
+ $p_position = $q_position;
+ } elseif ($c_position) {
+ $p_position = $c_position;
+ } else {
+ break;
+ }
+ if (is_null($placeholder_type)) {
+ $placeholder_type_guess = $query[$p_position];
+ }
+ if (is_int($quote = strpos($query, "'", $position)) && $quote < $p_position) {
+ if (!is_int($end_quote = strpos($query, "'", $quote + 1))) {
+ $err =& $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
+ 'prepare: query with an unterminated text string specified');
+ return $err;
+ }
+ switch ($this->escape_quotes) {
+ case '':
+ case "'":
+ $position = $end_quote + 1;
+ break;
+ default:
+ if ($end_quote == $quote + 1) {
+ $position = $end_quote + 1;
+ } else {
+ if ($query[$end_quote-1] == $this->escape_quotes) {
+ $position = $end_quote;
+ } else {
+ $position = $end_quote + 1;
+ }
+ }
+ break;
+ }
+ } elseif ($query[$position] == $placeholder_type_guess) {
+ if (is_null($placeholder_type)) {
+ $placeholder_type = $query[$p_position];
+ $question = $colon = $placeholder_type;
+ }
+ if ($placeholder_type == ':') {
+ $parameter = preg_replace('/^.{'.($position+1).'}([a-z0-9_]+).*$/si', '\\1', $query);
+ if ($parameter === '') {
+ $err =& $this->raiseError(MDB2_ERROR_SYNTAX, null, null,
+ 'prepare: named parameter with an empty name');
+ return $err;
+ }
+ $positions[$parameter] = $p_position;
+ $query = substr_replace($query, '?', $position, strlen($parameter)+1);
+ } else {
+ $positions[] = $p_position;
+ }
+ $position = $p_position + 1;
+ } else {
+ $position = $p_position;
+ }
+ }
+ $class_name = 'MDB2_Statement_'.$this->phptype;
+ $obj =& new $class_name($this, $positions, $query, $types, $result_types);
+ return $obj;
+ }
+
+ // }}}
+ // {{{ quote()
+
+ /**
+ * Convert a text value into a DBMS specific format that is suitable to
+ * compose query statements.
+ *
+ * @param string $value text string value that is intended to be converted.
+ * @param string $type type to which the value should be converted to
+ * @return string text string that represents the given argument value in
+ * a DBMS specific format.
+ * @access public
+ */
+ function quote($value, $type = null, $quote = true)
+ {
+ $result = $this->loadModule('Datatype');
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+ return $this->datatype->quote($value, $type, $quote);
+ }
+
+ // }}}
+ // {{{ getDeclaration()
+
+ /**
+ * Obtain DBMS specific SQL code portion needed to declare
+ * of the given type
+ *
+ * @param string $type type to which the value should be converted to
+ * @param string $name name the field to be declared.
+ * @param string $field definition of the field
+ * @return string DBMS specific SQL code portion that should be used to
+ * declare the specified field.
+ * @access public
+ */
+ function getDeclaration($type, $name, $field)
+ {
+ $result = $this->loadModule('Datatype');
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+ return $this->datatype->getDeclaration($type, $name, $field);
+ }
+
+ // }}}
+ // {{{ compareDefinition()
+
+ /**
+ * Obtain an array of changes that may need to applied
+ *
+ * @param array $current new definition
+ * @param array $previous old definition
+ * @return array containg all changes that will need to be applied
+ * @access public
+ */
+ function compareDefinition($current, $previous)
+ {
+ $result = $this->loadModule('Datatype');
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+ return $this->datatype->compareDefinition($current, $previous);
+ }
+
+ // }}}
+ // {{{ supports()
+
+ /**
+ * Tell whether a DB implementation or its backend extension
+ * supports a given feature.
+ *
+ * @param string $feature name of the feature (see the MDB2 class doc)
+ * @return boolean|string whether this DB implementation supports $feature
+ * false means no, true means native, 'emulated' means emulated
+ * @access public
+ */
+ function supports($feature)
+ {
+ if (array_key_exists($feature, $this->supported)) {
+ return $this->supported[$feature];
+ }
+ return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ "unknown support feature $feature");
+ }
+
+ // }}}
+ // {{{ getSequenceName()
+
+ /**
+ * adds sequence name formating to a sequence name
+ *
+ * @param string $sqn name of the sequence
+ * @return string formatted sequence name
+ * @access public
+ */
+ function getSequenceName($sqn)
+ {
+ return sprintf($this->options['seqname_format'],
+ preg_replace('/[^a-z0-9_]/i', '_', $sqn));
+ }
+
+ // }}}
+ // {{{ nextID()
+
+ /**
+ * returns the next free id of a sequence
+ *
+ * @param string $seq_name name of the sequence
+ * @param boolean $ondemand when true the seqence is
+ * automatic created, if it
+ * not exists
+ * @return mixed MDB2 Error Object or id
+ * @access public
+ */
+ function nextID($seq_name, $ondemand = true)
+ {
+ return $this->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ 'nextID: method not implemented');
+ }
+
+ // }}}
+ // {{{ lastInsertID()
+
+ /**
+ * returns the autoincrement ID if supported or $id
+ *
+ * @param mixed $id value as returned by getBeforeId()
+ * @param string $table name of the table into which a new row was inserted
+ * @return mixed MDB2 Error Object or id
+ * @access public
+ */
+ function lastInsertID($table = null, $field = null)
+ {
+ $seq = $table.(empty($field) ? '' : '_'.$field);
+ return $this->currID($seq);
+ }
+
+ // }}}
+ // {{{ currID()
+
+ /**
+ * returns the current id of a sequence
+ *
+ * @param string $seq_name name of the sequence
+ * @return mixed MDB2 Error Object or id
+ * @access public
+ */
+ function currID($seq_name)
+ {
+ $this->warnings[] = 'database does not support getting current
+ sequence value, the sequence value was incremented';
+ return $this->nextID($seq_name);
+ }
+
+ // }}}
+ // {{{ queryOne()
+
+ /**
+ * Execute the specified query, fetch the value from the first column of
+ * the first row of the result set and then frees
+ * the result set.
+ *
+ * @param string $query the SELECT query statement to be executed.
+ * @param string $type optional argument that specifies the expected
+ * datatype of the result set field, so that an eventual conversion
+ * may be performed. The default datatype is text, meaning that no
+ * conversion is performed
+ * @return mixed MDB2_OK or field value on success, a MDB2 error on failure
+ * @access public
+ */
+ function queryOne($query, $type = null)
+ {
+ $result = $this->query($query, $type);
+ if (!MDB2::isResultCommon($result)) {
+ return $result;
+ }
+
+ $one = $result->fetchOne();
+ $result->free();
+ return $one;
+ }
+
+ // }}}
+ // {{{ queryRow()
+
+ /**
+ * Execute the specified query, fetch the values from the first
+ * row of the result set into an array and then frees
+ * the result set.
+ *
+ * @param string $query the SELECT query statement to be executed.
+ * @param array $types optional array argument that specifies a list of
+ * expected datatypes of the result set columns, so that the eventual
+ * conversions may be performed. The default list of datatypes is
+ * empty, meaning that no conversion is performed.
+ * @param int $fetchmode how the array data should be indexed
+ * @return mixed MDB2_OK or data array on success, a MDB2 error on failure
+ * @access public
+ */
+ function queryRow($query, $types = null, $fetchmode = MDB2_FETCHMODE_DEFAULT)
+ {
+ $result = $this->query($query, $types);
+ if (!MDB2::isResultCommon($result)) {
+ return $result;
+ }
+
+ $row = $result->fetchRow($fetchmode);
+ $result->free();
+ return $row;
+ }
+
+ // }}}
+ // {{{ queryCol()
+
+ /**
+ * Execute the specified query, fetch the value from the first column of
+ * each row of the result set into an array and then frees the result set.
+ *
+ * @param string $query the SELECT query statement to be executed.
+ * @param string $type optional argument that specifies the expected
+ * datatype of the result set field, so that an eventual conversion
+ * may be performed. The default datatype is text, meaning that no
+ * conversion is performed
+ * @param int $colnum the row number to fetch
+ * @return mixed MDB2_OK or data array on success, a MDB2 error on failure
+ * @access public
+ */
+ function queryCol($query, $type = null, $colnum = 0)
+ {
+ $result = $this->query($query, $type);
+ if (!MDB2::isResultCommon($result)) {
+ return $result;
+ }
+
+ $col = $result->fetchCol($colnum);
+ $result->free();
+ return $col;
+ }
+
+ // }}}
+ // {{{ queryAll()
+
+ /**
+ * Execute the specified query, fetch all the rows of the result set into
+ * a two dimensional array and then frees the result set.
+ *
+ * @param string $query the SELECT query statement to be executed.
+ * @param array $types optional array argument that specifies a list of
+ * expected datatypes of the result set columns, so that the eventual
+ * conversions may be performed. The default list of datatypes is
+ * empty, meaning that no conversion is performed.
+ * @param int $fetchmode how the array data should be indexed
+ * @param boolean $rekey if set to true, the $all will have the first
+ * column as its first dimension
+ * @param boolean $force_array used only when the query returns exactly
+ * two columns. If true, the values of the returned array will be
+ * one-element arrays instead of scalars.
+ * @param boolean $group if true, the values of the returned array is
+ * wrapped in another array. If the same key value (in the first
+ * column) repeats itself, the values will be appended to this array
+ * instead of overwriting the existing values.
+ * @return mixed MDB2_OK or data array on success, a MDB2 error on failure
+ * @access public
+ */
+ function queryAll($query, $types = null, $fetchmode = MDB2_FETCHMODE_DEFAULT,
+ $rekey = false, $force_array = false, $group = false)
+ {
+ $result = $this->query($query, $types);
+ if (!MDB2::isResultCommon($result)) {
+ return $result;
+ }
+
+ $all = $result->fetchAll($fetchmode, $rekey, $force_array, $group);
+ $result->free();
+ return $all;
+ }
+}
+
+class MDB2_Result
+{
+}
+
+class MDB2_Result_Common extends MDB2_Result
+{
+ var $db;
+ var $result;
+ var $rownum = -1;
+ var $types;
+ var $values;
+ var $offset;
+ var $offset_count = 0;
+ var $limit;
+ var $column_names;
+
+ // {{{ constructor
+
+ /**
+ * Constructor
+ */
+ function __construct(&$db, &$result, $limit = 0, $offset = 0)
+ {
+ $this->db =& $db;
+ $this->result =& $result;
+ $this->offset = $offset;
+ $this->limit = max(0, $limit - 1);
+ }
+
+ function MDB2_Result_Common(&$db, &$result, $limit = 0, $offset = 0)
+ {
+ $this->__construct($db, $result, $limit, $offset);
+ }
+
+ // }}}
+ // {{{ setResultTypes()
+
+ /**
+ * Define the list of types to be associated with the columns of a given
+ * result set.
+ *
+ * This function may be called before invoking fetchRow(), fetchOne(),
+ * fetchCol() and fetchAll() so that the necessary data type
+ * conversions are performed on the data to be retrieved by them. If this
+ * function is not called, the type of all result set columns is assumed
+ * to be text, thus leading to not perform any conversions.
+ *
+ * @param string $types array variable that lists the
+ * data types to be expected in the result set columns. If this array
+ * contains less types than the number of columns that are returned
+ * in the result set, the remaining columns are assumed to be of the
+ * type text. Currently, the types clob and blob are not fully
+ * supported.
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function setResultTypes($types)
+ {
+ $load = $this->db->loadModule('Datatype');
+ if (PEAR::isError($load)) {
+ return $load;
+ }
+ return $this->db->datatype->setResultTypes($this, $types);
+ }
+
+ // }}}
+ // {{{ seek()
+
+ /**
+ * seek to a specific row in a result set
+ *
+ * @param int $rownum number of the row where the data can be found
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function seek($rownum = 0)
+ {
+ $target_rownum = $rownum - 1;
+ if ($this->rownum > $target_rownum) {
+ return $this->db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ 'seek: seeking to previous rows not implemented');
+ }
+ while ($this->rownum < $target_rownum) {
+ $this->fetchRow();
+ }
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ fetchRow()
+
+ /**
+ * Fetch and return a row of data
+ *
+ * @param int $fetchmode how the array data should be indexed
+ * @param int $rownum number of the row where the data can be found
+ * @return int data array on success, a MDB2 error on failure
+ * @access public
+ */
+ function &fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
+ {
+ $err =& $this->db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ 'fetch: method not implemented');
+ return $err;
+ }
+
+ // }}}
+ // {{{ fetchOne()
+
+ /**
+ * fetch single column from the first row from a result set
+ *
+ * @param int $colnum the column number to fetch
+ * @return string data on success, a MDB2 error on failure
+ * @access public
+ */
+ function fetchOne($colnum = 0)
+ {
+ $fetchmode = is_numeric($colnum) ? MDB2_FETCHMODE_ORDERED : MDB2_FETCHMODE_ASSOC;
+ $row = $this->fetchRow($fetchmode);
+ if (!is_array($row) || PEAR::isError($row)) {
+ return $row;
+ }
+ if (!array_key_exists($colnum, $row)) {
+ return $this->db->raiseError(MDB2_ERROR_TRUNCATED);
+ }
+ return $row[$colnum];
+ }
+
+ // }}}
+ // {{{ fetchCol()
+
+ /**
+ * Fetch and return a column of data (it uses current for that)
+ *
+ * @param int $colnum the column number to fetch
+ * @return mixed data array on success, a MDB2 error on failure
+ * @access public
+ */
+ function fetchCol($colnum = 0)
+ {
+ $column = array();
+ $fetchmode = is_numeric($colnum) ? MDB2_FETCHMODE_ORDERED : MDB2_FETCHMODE_ASSOC;
+ $row = $this->fetchRow($fetchmode);
+ if (is_array($row)) {
+ if (!array_key_exists($colnum, $row)) {
+ return $this->db->raiseError(MDB2_ERROR_TRUNCATED);
+ }
+ do {
+ $column[] = $row[$colnum];
+ } while (is_array($row = $this->fetchRow($fetchmode)));
+ }
+ if (PEAR::isError($row)) {
+ return $row;
+ }
+ return $column;
+ }
+
+ // }}}
+ // {{{ fetchAll()
+
+ /**
+ * Fetch and return a column of data (it uses fetchRow for that)
+ *
+ * @param int $fetchmode the fetch mode to use:
+ * + MDB2_FETCHMODE_ORDERED
+ * + MDB2_FETCHMODE_ASSOC
+ * + MDB2_FETCHMODE_ORDERED | MDB2_FETCHMODE_FLIPPED
+ * + MDB2_FETCHMODE_ASSOC | MDB2_FETCHMODE_FLIPPED
+ * @param boolean $rekey if set to true, the $all will have the first
+ * column as its first dimension
+ * @param boolean $force_array used only when the query returns exactly
+ * two columns. If true, the values of the returned array will be
+ * one-element arrays instead of scalars.
+ * @param boolean $group if true, the values of the returned array is
+ * wrapped in another array. If the same key value (in the first
+ * column) repeats itself, the values will be appended to this array
+ * instead of overwriting the existing values.
+ * @return mixed data array on success, a MDB2 error on failure
+ * @access public
+ * @see getAssoc()
+ */
+ function fetchAll($fetchmode = MDB2_FETCHMODE_DEFAULT, $rekey = false,
+ $force_array = false, $group = false)
+ {
+ $all = array();
+ $row = $this->fetchRow($fetchmode);
+ if (PEAR::isError($row)) {
+ return $row;
+ } elseif (!$row) {
+ return $all;
+ }
+
+ $shift_array = $rekey ? false : null;
+ if (!is_null($shift_array)) {
+ if (is_object($row)) {
+ $colnum = count(get_object_vars($row));
+ } else {
+ $colnum = count($row);
+ }
+ if ($colnum < 2) {
+ return $this->db->raiseError(MDB2_ERROR_TRUNCATED);
+ }
+ $shift_array = (!$force_array && $colnum == 2);
+ }
+
+ if ($rekey) {
+ do {
+ if (is_object($row)) {
+ $arr = get_object_vars($row);
+ $key = reset($arr);
+ unset($row->{$key});
+ } else {
+ if ($fetchmode & MDB2_FETCHMODE_ASSOC) {
+ $key = reset($row);
+ unset($row[key($row)]);
+ } else {
+ $key = array_shift($row);
+ }
+ if ($shift_array) {
+ $row = array_shift($row);
+ }
+ }
+ if ($group) {
+ $all[$key][] = $row;
+ } else {
+ $all[$key] = $row;
+ }
+ } while (($row = $this->fetchRow($fetchmode)));
+ } elseif ($fetchmode & MDB2_FETCHMODE_FLIPPED) {
+ do {
+ foreach ($row as $key => $val) {
+ $all[$key][] = $val;
+ }
+ } while (($row = $this->fetchRow($fetchmode)));
+ } else {
+ do {
+ $all[] = $row;
+ } while (($row = $this->fetchRow($fetchmode)));
+ }
+
+ return $all;
+ }
+
+ // }}}
+ // {{{ rowCount()
+
+ /**
+ * returns the actual row number that was last fetched (count from 0)
+ * @return integer
+ */
+ function rowCount()
+ {
+ return $this->rownum + 1;
+ }
+
+ // }}}
+ // {{{ numRows()
+
+ /**
+ * returns the number of rows in a result object
+ *
+ * @return mixed MDB2 Error Object or the number of rows
+ * @access public
+ */
+ function numRows()
+ {
+ return $this->db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ 'numRows: method not implemented');
+ }
+
+ // }}}
+ // {{{ nextResult()
+
+ /**
+ * Move the internal result pointer to the next available result
+ *
+ * @param a valid result resource
+ * @return true on success or an error object on failure
+ * @access public
+ */
+ function nextResult()
+ {
+ return $this->db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ 'nextResult: method not implemented');
+ }
+
+ // }}}
+ // {{{ getColumnNames()
+
+ /**
+ * Retrieve the names of columns returned by the DBMS in a query result or
+ * from the cache.
+ *
+ * @return mixed associative array variable
+ * that holds the names of columns. The indexes of the array are
+ * the column names mapped to lower case and the values are the
+ * respective numbers of the columns starting from 0. Some DBMS may
+ * not return any columns when the result set does not contain any
+ * rows.
+ * a MDB2 error on failure
+ * @access public
+ */
+ function getColumnNames()
+ {
+ if (!isset($this->column_names)) {
+ $result = $this->_getColumnNames();
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+ $this->column_names = $result;
+ }
+ return $this->column_names;
+ }
+
+ // }}}
+ // {{{ _getColumnNames()
+
+ /**
+ * Retrieve the names of columns returned by the DBMS in a query result.
+ *
+ * @return mixed associative array variable
+ * that holds the names of columns. The indexes of the array are
+ * the column names mapped to lower case and the values are the
+ * respective numbers of the columns starting from 0. Some DBMS may
+ * not return any columns when the result set does not contain any
+ * rows.
+ * a MDB2 error on failure
+ * @access private
+ */
+ function _getColumnNames()
+ {
+ return $this->db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ 'getColumnNames: method not implemented');
+ }
+
+ // }}}
+ // {{{ numCols()
+
+ /**
+ * Count the number of columns returned by the DBMS in a query result.
+ *
+ * @return mixed integer value with the number of columns, a MDB2 error
+ * on failure
+ * @access public
+ */
+ function numCols()
+ {
+ return $this->db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
+ 'numCols: method not implemented');
+ }
+
+ // }}}
+ // {{{ getResource()
+
+ /**
+ * return the resource associated with the result object
+ *
+ * @return resource
+ * @access public
+ */
+ function getResource()
+ {
+ return $this->result;
+ }
+
+
+ // }}}
+ // {{{ bindColumn()
+
+ /**
+ * Set bind variable to a column.
+ *
+ * @param int $column
+ * @param mixed $value
+ * @param string $type specifies the type of the field
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function bindColumn($column, &$value, $type = null)
+ {
+ if (!is_numeric($column)) {
+ $column_names = $this->getColumnNames();
+ if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+ if ($this->db->options['field_case'] == CASE_LOWER) {
+ $column = strtolower($column);
+ } else {
+ $column = strtoupper($column);
+ }
+ }
+ $column = $column_names[$column];
+ }
+ $this->values[$column] =& $value;
+ if (!is_null($type)) {
+ $this->types[$column] = $type;
+ }
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ _assignBindColumns()
+
+ /**
+ * Bind a variable to a value in the result row.
+ *
+ * @param array $row
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access private
+ */
+ function _assignBindColumns($row)
+ {
+ $row = array_values($row);
+ foreach ($row as $column => $value) {
+ if (array_key_exists($column, $this->values)) {
+ $this->values[$column] = $value;
+ }
+ }
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ free()
+
+ /**
+ * Free the internal resources associated with result.
+ *
+ * @return boolean true on success, false if result is invalid
+ * @access public
+ */
+ function free()
+ {
+ $this->result = null;
+ return MDB2_OK;
+ }
+}
+
+// }}}
+// {{{ class MDB2_Row
+
+/**
+ * Pear MDB2 Row Object
+ * @see MDB2_Driver_Common::setFetchMode()
+ */
+class MDB2_Row
+{
+ // {{{ constructor
+
+ /**
+ * constructor
+ *
+ * @param resource row data as array
+ */
+ function __construct(&$row)
+ {
+ foreach ($row as $key => $value) {
+ $this->$key = &$row[$key];
+ }
+ }
+
+ function MDB2_Row(&$row)
+ {
+ $this->__construct($row);
+ }
+}
+
+class MDB2_Statement_Common
+{
+ var $db;
+ var $statement;
+ var $query;
+ var $result_types;
+ var $types;
+ var $values;
+ var $row_limit;
+ var $row_offset;
+
+ // {{{ constructor
+
+ /**
+ * Constructor
+ */
+ function __construct(&$db, &$statement, $query, $types, $result_types, $limit = null, $offset = null)
+ {
+ $this->db =& $db;
+ $this->statement =& $statement;
+ $this->query = $query;
+ $this->types = (array)$types;
+ $this->result_types = (array)$result_types;
+ $this->row_limit = $limit;
+ $this->row_offset = $offset;
+ }
+
+ function MDB2_Statement_Common(&$db, &$statement, $query, $types, $result_types, $limit = null, $offset = null)
+ {
+ $this->__construct($db, $statement, $query, $types, $result_types, $limit, $offset);
+ }
+
+ // }}}
+ // {{{ bindParam()
+
+ /**
+ * Set the value of a parameter of a prepared query.
+ *
+ * @param int $parameter the order number of the parameter in the query
+ * statement. The order number of the first parameter is 1.
+ * @param mixed $value value that is meant to be assigned to specified
+ * parameter. The type of the value depends on the $type argument.
+ * @param string $type specifies the type of the field
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function bindParam($parameter, &$value, $type = null)
+ {
+ if (!is_numeric($parameter)) {
+ $parameter = preg_replace('/^:(.*)$/', '\\1', $parameter);
+ }
+ $this->values[$parameter] =& $value;
+ if (!is_null($type)) {
+ $this->types[$parameter] = $type;
+ }
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ bindParamArray()
+
+ /**
+ * Set the values of multiple a parameter of a prepared query in bulk.
+ *
+ * @param array $values array thats specifies all necessary infromation
+ * for bindParam() the array elements must use keys corresponding to
+ * the number of the position of the parameter.
+ * @param array $types specifies the types of the fields
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ * @see bindParam()
+ */
+ function bindParamArray(&$values, $types = null)
+ {
+ $types = is_array($types) ? array_values($types) : array_fill(0, count($values), null);
+ $parameters = array_keys($values);
+ foreach ($parameters as $key => $parameter) {
+ $this->bindParam($parameter, $values[$parameter], $types[$key]);
+ }
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ execute()
+
+ /**
+ * Execute a prepared query statement.
+ *
+ * @param array $values array thats specifies all necessary infromation
+ * for bindParam() the array elements must use keys corresponding to
+ * the number of the position of the parameter.
+ * @param mixed $result_class string which specifies which result class to use
+ * @param mixed $result_wrap_class string which specifies which class to wrap results in
+ * @return mixed a result handle or MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function &execute($values = null, $result_class = true, $result_wrap_class = false)
+ {
+ if (!empty($values)) {
+ $this->bindParamArray($values);
+ }
+ $result =& $this->_execute($result_class, $result_wrap_class);
+ if (is_numeric($result)) {
+ $this->rownum = $result - 1;
+ }
+ return $result;
+ }
+
+ // }}}
+ // {{{ _execute()
+
+ /**
+ * Execute a prepared query statement helper method.
+ *
+ * @param mixed $result_class string which specifies which result class to use
+ * @param mixed $result_wrap_class string which specifies which class to wrap results in
+ * @return mixed a result handle or MDB2_OK on success, a MDB2 error on failure
+ * @access private
+ */
+ function &_execute($result_class = true, $result_wrap_class = false)
+ {
+ $query = '';
+ $last_position = $i = 0;
+ foreach ($this->values as $parameter => $value) {
+ $current_position = $this->statement[$parameter];
+ $query.= substr($this->query, $last_position, $current_position - $last_position);
+ if (!isset($value)) {
+ $value_quoted = 'NULL';
+ } else {
+ $type = array_key_exists($parameter, $this->types) ? $this->types[$parameter] : null;
+ $value_quoted = $this->db->quote($value, $type);
+ if (PEAR::isError($value_quoted)) {
+ return $value_quoted;
+ }
+ }
+ $query.= $value_quoted;
+ $last_position = $current_position + 1;
+ ++$i;
+ }
+ $query.= substr($this->query, $last_position);
+
+ $this->db->row_offset = $this->row_offset;
+ $this->db->row_limit = $this->row_limit;
+ $result =& $this->db->query($query, $this->result_types, $result_class, $result_wrap_class);
+ return $result;
+ }
+
+ // }}}
+ // {{{ free()
+
+ /**
+ * Release resources allocated for the specified prepared query.
+ *
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function free()
+ {
+ return MDB2_OK;
+ }
+}
+
+class MDB2_Module_Common
+{
+ /**
+ * contains the key to the global MDB2 instance array of the associated
+ * MDB2 instance
+ *
+ * @var integer
+ * @access protected
+ */
+ var $db_index;
+
+ // {{{ constructor
+
+ /**
+ * Constructor
+ */
+ function __construct($db_index)
+ {
+ $this->db_index = $db_index;
+ }
+
+ function MDB2_Module_Common($db_index)
+ {
+ $this->__construct($db_index);
+ }
+
+
+ // }}}
+ // {{{ getDBInstance()
+
+ /**
+ * get the instance of MDB2 associated with the module instance
+ *
+ * @return object MDB2 instance or a MDB2 error on failure
+ * @access public
+ */
+ function &getDBInstance()
+ {
+ if (isset($GLOBALS['_MDB2_databases'][$this->db_index])) {
+ $result =& $GLOBALS['_MDB2_databases'][$this->db_index];
+ } else {
+ $result =& MDB2::raiseError(MDB2_ERROR, null, null, 'could not find MDB2 instance');
+ }
+ return $result;
+ }
+}
+
+// }}}
+// {{{ MDB2_closeOpenTransactions()
+
+/**
+ * close any open transactions form persistant connections
+ *
+ * @return void
+ * @access public
+ */
+function MDB2_closeOpenTransactions()
+{
+ reset($GLOBALS['_MDB2_databases']);
+ while (next($GLOBALS['_MDB2_databases'])) {
+ $key = key($GLOBALS['_MDB2_databases']);
+ if ($GLOBALS['_MDB2_databases'][$key]->opened_persistent
+ && $GLOBALS['_MDB2_databases'][$key]->in_transaction
+ ) {
+ $GLOBALS['_MDB2_databases'][$key]->rollback();
+ }
+ }
+}
+
+// }}}
+// {{{ MDB2_defaultDebugOutput()
+
+/**
+ * default debug output handler
+ *
+ * @param object $db reference to an MDB2 database object
+ * @param string $message message that should be appended to the debug
+ * variable
+ * @return string the corresponding error message, of false
+ * if the error code was unknown
+ * @access public
+ */
+function MDB2_defaultDebugOutput(&$db, $scope, $message)
+{
+ $db->debug_output.= $scope.'('.$db->db_index.'): ';
+ $db->debug_output.= $message.$db->getOption('log_line_break');
+}
+
+?> \ No newline at end of file
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 09:19:52 +0000