summaryrefslogtreecommitdiff
path: root/program/include/rcube_utils.php
diff options
context:
space:
mode:
authoralecpl <alec@alec.pl>2012-04-16 11:02:21 +0000
committeralecpl <alec@alec.pl>2012-04-16 11:02:21 +0000
commit1aceb9cec82639250a603aa0806f0399f7bae68d (patch)
tree1fbeab49d53b6dccbc4230d73155e83e5547b264 /program/include/rcube_utils.php
parent4372e9278011452ec8723fa4434e1d3ade726213 (diff)
- Framework refactoring (I hope it's the last one):
rcube,rcmail,rcube_ui -> rcube,rcmail,rcube_utils renamed main.inc into rcube_bc.inc
Diffstat (limited to 'program/include/rcube_utils.php')
-rw-r--r--program/include/rcube_utils.php793
1 files changed, 793 insertions, 0 deletions
diff --git a/program/include/rcube_utils.php b/program/include/rcube_utils.php
new file mode 100644
index 000000000..663adb68e
--- /dev/null
+++ b/program/include/rcube_utils.php
@@ -0,0 +1,793 @@
+<?php
+
+/*
+ +-----------------------------------------------------------------------+
+ | program/include/rcube_utils.php |
+ | |
+ | This file is part of the Roundcube Webmail client |
+ | Copyright (C) 2008-2012, The Roundcube Dev Team |
+ | Copyright (C) 2011-2012, Kolab Systems AG |
+ | |
+ | Licensed under the GNU General Public License version 3 or |
+ | any later version with exceptions for skins & plugins. |
+ | See the README file for a full license statement. |
+ | |
+ | PURPOSE: |
+ | Utility class providing common functions |
+ +-----------------------------------------------------------------------+
+ | Author: Thomas Bruederli <roundcube@gmail.com> |
+ | Author: Aleksander Machniak <alec@alec.pl> |
+ +-----------------------------------------------------------------------+
+
+ $Id$
+
+*/
+
+
+/**
+ * Utility class providing common functions
+ *
+ * @package Core
+ */
+class rcube_utils
+{
+ // define constants for input reading
+ const INPUT_GET = 0x0101;
+ const INPUT_POST = 0x0102;
+ const INPUT_GPC = 0x0103;
+
+ /**
+ * Helper method to set a cookie with the current path and host settings
+ *
+ * @param string Cookie name
+ * @param string Cookie value
+ * @param string Expiration time
+ */
+ public static function setcookie($name, $value, $exp = 0)
+ {
+ if (headers_sent()) {
+ return;
+ }
+
+ $cookie = session_get_cookie_params();
+ $secure = self::https_check();
+
+ setcookie($name, $value, $exp, $cookie['path'], $cookie['domain'], $secure, true);
+ }
+
+ /**
+ * E-mail address validation.
+ *
+ * @param string $email Email address
+ * @param boolean $dns_check True to check dns
+ *
+ * @return boolean True on success, False if address is invalid
+ */
+ public static function check_email($email, $dns_check=true)
+ {
+ // Check for invalid characters
+ if (preg_match('/[\x00-\x1F\x7F-\xFF]/', $email)) {
+ return false;
+ }
+
+ // Check for length limit specified by RFC 5321 (#1486453)
+ if (strlen($email) > 254) {
+ return false;
+ }
+
+ $email_array = explode('@', $email);
+
+ // Check that there's one @ symbol
+ if (count($email_array) < 2) {
+ return false;
+ }
+
+ $domain_part = array_pop($email_array);
+ $local_part = implode('@', $email_array);
+
+ // from PEAR::Validate
+ $regexp = '&^(?:
+ ("\s*(?:[^"\f\n\r\t\v\b\s]+\s*)+")| #1 quoted name
+ ([-\w!\#\$%\&\'*+~/^`|{}=]+(?:\.[-\w!\#\$%\&\'*+~/^`|{}=]+)*)) #2 OR dot-atom (RFC5322)
+ $&xi';
+
+ if (!preg_match($regexp, $local_part)) {
+ return false;
+ }
+
+ // Check domain part
+ if (preg_match('/^\[*(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}\]*$/', $domain_part)) {
+ return true; // IP address
+ }
+ else {
+ // If not an IP address
+ $domain_array = explode('.', $domain_part);
+ // Not enough parts to be a valid domain
+ if (sizeof($domain_array) < 2) {
+ return false;
+ }
+
+ foreach ($domain_array as $part) {
+ if (!preg_match('/^(([A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])|([A-Za-z0-9]))$/', $part)) {
+ return false;
+ }
+ }
+
+ $rcube = rcube::get_instance();
+
+ if (!$dns_check || !$rcube->config->get('email_dns_check')) {
+ return true;
+ }
+
+ if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN' && version_compare(PHP_VERSION, '5.3.0', '<')) {
+ $lookup = array();
+ @exec("nslookup -type=MX " . escapeshellarg($domain_part) . " 2>&1", $lookup);
+ foreach ($lookup as $line) {
+ if (strpos($line, 'MX preference')) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ // find MX record(s)
+ if (getmxrr($domain_part, $mx_records)) {
+ return true;
+ }
+
+ // find any DNS record
+ if (checkdnsrr($domain_part, 'ANY')) {
+ return true;
+ }
+ }
+
+ return false;
+ }
+
+ /**
+ * Check whether the HTTP referer matches the current request
+ *
+ * @return boolean True if referer is the same host+path, false if not
+ */
+ public static function check_referer()
+ {
+ $uri = parse_url($_SERVER['REQUEST_URI']);
+ $referer = parse_url(rcube_request_header('Referer'));
+ return $referer['host'] == rcube_request_header('Host') && $referer['path'] == $uri['path'];
+ }
+
+
+ /**
+ * Replacing specials characters to a specific encoding type
+ *
+ * @param string Input string
+ * @param string Encoding type: text|html|xml|js|url
+ * @param string Replace mode for tags: show|replace|remove
+ * @param boolean Convert newlines
+ *
+ * @return string The quoted string
+ */
+ public static function rep_specialchars_output($str, $enctype = '', $mode = '', $newlines = true)
+ {
+ static $html_encode_arr = false;
+ static $js_rep_table = false;
+ static $xml_rep_table = false;
+
+ // encode for HTML output
+ if ($enctype == 'html') {
+ if (!$html_encode_arr) {
+ $html_encode_arr = get_html_translation_table(HTML_SPECIALCHARS);
+ unset($html_encode_arr['?']);
+ }
+
+ $encode_arr = $html_encode_arr;
+
+ // don't replace quotes and html tags
+ if ($mode == 'show' || $mode == '') {
+ $ltpos = strpos($str, '<');
+ if ($ltpos !== false && strpos($str, '>', $ltpos) !== false) {
+ unset($encode_arr['"']);
+ unset($encode_arr['<']);
+ unset($encode_arr['>']);
+ unset($encode_arr['&']);
+ }
+ }
+ else if ($mode == 'remove') {
+ $str = strip_tags($str);
+ }
+
+ $out = strtr($str, $encode_arr);
+
+ // avoid douple quotation of &
+ $out = preg_replace('/&amp;([A-Za-z]{2,6}|#[0-9]{2,4});/', '&\\1;', $out);
+
+ return $newlines ? nl2br($out) : $out;
+ }
+
+ // if the replace tables for XML and JS are not yet defined
+ if ($js_rep_table === false) {
+ $js_rep_table = $xml_rep_table = array();
+ $xml_rep_table['&'] = '&amp;';
+
+ // can be increased to support more charsets
+ for ($c=160; $c<256; $c++) {
+ $xml_rep_table[chr($c)] = "&#$c;";
+ }
+
+ $xml_rep_table['"'] = '&quot;';
+ $js_rep_table['"'] = '\\"';
+ $js_rep_table["'"] = "\\'";
+ $js_rep_table["\\"] = "\\\\";
+ // Unicode line and paragraph separators (#1486310)
+ $js_rep_table[chr(hexdec(E2)).chr(hexdec(80)).chr(hexdec(A8))] = '&#8232;';
+ $js_rep_table[chr(hexdec(E2)).chr(hexdec(80)).chr(hexdec(A9))] = '&#8233;';
+ }
+
+ // encode for javascript use
+ if ($enctype == 'js') {
+ return preg_replace(array("/\r?\n/", "/\r/", '/<\\//'), array('\n', '\n', '<\\/'), strtr($str, $js_rep_table));
+ }
+
+ // encode for plaintext
+ if ($enctype == 'text') {
+ return str_replace("\r\n", "\n", $mode=='remove' ? strip_tags($str) : $str);
+ }
+
+ if ($enctype == 'url') {
+ return rawurlencode($str);
+ }
+
+ // encode for XML
+ if ($enctype == 'xml') {
+ return strtr($str, $xml_rep_table);
+ }
+
+ // no encoding given -> return original string
+ return $str;
+ }
+
+
+ /**
+ * Read input value and convert it for internal use
+ * Performs stripslashes() and charset conversion if necessary
+ *
+ * @param string Field name to read
+ * @param int Source to get value from (GPC)
+ * @param boolean Allow HTML tags in field value
+ * @param string Charset to convert into
+ *
+ * @return string Field value or NULL if not available
+ */
+ public static function get_input_value($fname, $source, $allow_html=FALSE, $charset=NULL)
+ {
+ $value = NULL;
+
+ if ($source == self::INPUT_GET) {
+ if (isset($_GET[$fname])) {
+ $value = $_GET[$fname];
+ }
+ }
+ else if ($source == self::INPUT_POST) {
+ if (isset($_POST[$fname])) {
+ $value = $_POST[$fname];
+ }
+ }
+ else if ($source == self::INPUT_GPC) {
+ if (isset($_POST[$fname])) {
+ $value = $_POST[$fname];
+ }
+ else if (isset($_GET[$fname])) {
+ $value = $_GET[$fname];
+ }
+ else if (isset($_COOKIE[$fname])) {
+ $value = $_COOKIE[$fname];
+ }
+ }
+
+ return self::parse_input_value($value, $allow_html, $charset);
+ }
+
+
+ /**
+ * Parse/validate input value. See self::get_input_value()
+ * Performs stripslashes() and charset conversion if necessary
+ *
+ * @param string Input value
+ * @param boolean Allow HTML tags in field value
+ * @param string Charset to convert into
+ *
+ * @return string Parsed value
+ */
+ public static function parse_input_value($value, $allow_html=FALSE, $charset=NULL)
+ {
+ global $OUTPUT;
+
+ if (empty($value)) {
+ return $value;
+ }
+
+ if (is_array($value)) {
+ foreach ($value as $idx => $val) {
+ $value[$idx] = self::parse_input_value($val, $allow_html, $charset);
+ }
+ return $value;
+ }
+
+ // strip single quotes if magic_quotes_sybase is enabled
+ if (ini_get('magic_quotes_sybase')) {
+ $value = str_replace("''", "'", $value);
+ }
+ // strip slashes if magic_quotes enabled
+ else if (get_magic_quotes_gpc() || get_magic_quotes_runtime()) {
+ $value = stripslashes($value);
+ }
+
+ // remove HTML tags if not allowed
+ if (!$allow_html) {
+ $value = strip_tags($value);
+ }
+
+ $output_charset = is_object($OUTPUT) ? $OUTPUT->get_charset() : null;
+
+ // remove invalid characters (#1488124)
+ if ($output_charset == 'UTF-8') {
+ $value = rcube_charset::clean($value);
+ }
+
+ // convert to internal charset
+ if ($charset && $output_charset) {
+ $value = rcube_charset::convert($value, $output_charset, $charset);
+ }
+
+ return $value;
+ }
+
+
+ /**
+ * Convert array of request parameters (prefixed with _)
+ * to a regular array with non-prefixed keys.
+ *
+ * @param int $mode Source to get value from (GPC)
+ * @param string $ignore PCRE expression to skip parameters by name
+ *
+ * @return array Hash array with all request parameters
+ */
+ public static function request2param($mode = null, $ignore = 'task|action')
+ {
+ $out = array();
+ $src = $mode == self::INPUT_GET ? $_GET : ($mode == self::INPUT_POST ? $_POST : $_REQUEST);
+
+ foreach ($src as $key => $value) {
+ $fname = $key[0] == '_' ? substr($key, 1) : $key;
+ if ($ignore && !preg_match('/^(' . $ignore . ')$/', $fname)) {
+ $out[$fname] = self::get_input_value($key, $mode);
+ }
+ }
+
+ return $out;
+ }
+
+
+ /**
+ * Convert the given string into a valid HTML identifier
+ * Same functionality as done in app.js with rcube_webmail.html_identifier()
+ */
+ public static function html_identifier($str, $encode=false)
+ {
+ if ($encode) {
+ return rtrim(strtr(base64_encode($str), '+/', '-_'), '=');
+ }
+ else {
+ return asciiwords($str, true, '_');
+ }
+ }
+
+
+ /**
+ * Create an edit field for inclusion on a form
+ *
+ * @param string col field name
+ * @param string value field value
+ * @param array attrib HTML element attributes for field
+ * @param string type HTML element type (default 'text')
+ *
+ * @return string HTML field definition
+ */
+ public static function get_edit_field($col, $value, $attrib, $type = 'text')
+ {
+ static $colcounts = array();
+
+ $fname = '_'.$col;
+ $attrib['name'] = $fname . ($attrib['array'] ? '[]' : '');
+ $attrib['class'] = trim($attrib['class'] . ' ff_' . $col);
+
+ if ($type == 'checkbox') {
+ $attrib['value'] = '1';
+ $input = new html_checkbox($attrib);
+ }
+ else if ($type == 'textarea') {
+ $attrib['cols'] = $attrib['size'];
+ $input = new html_textarea($attrib);
+ }
+ else if ($type == 'select') {
+ $input = new html_select($attrib);
+ $input->add('---', '');
+ $input->add(array_values($attrib['options']), array_keys($attrib['options']));
+ }
+ else if ($attrib['type'] == 'password') {
+ $input = new html_passwordfield($attrib);
+ }
+ else {
+ if ($attrib['type'] != 'text' && $attrib['type'] != 'hidden') {
+ $attrib['type'] = 'text';
+ }
+ $input = new html_inputfield($attrib);
+ }
+
+ // use value from post
+ if (isset($_POST[$fname])) {
+ $postvalue = self::get_input_value($fname, self::INPUT_POST, true);
+ $value = $attrib['array'] ? $postvalue[intval($colcounts[$col]++)] : $postvalue;
+ }
+
+ $out = $input->show($value);
+
+ return $out;
+ }
+
+
+ /**
+ * Replace all css definitions with #container [def]
+ * and remove css-inlined scripting
+ *
+ * @param string CSS source code
+ * @param string Container ID to use as prefix
+ *
+ * @return string Modified CSS source
+ */
+ public static function mod_css_styles($source, $container_id, $allow_remote=false)
+ {
+ $last_pos = 0;
+ $replacements = new rcube_string_replacer;
+
+ // ignore the whole block if evil styles are detected
+ $source = self::xss_entity_decode($source);
+ $stripped = preg_replace('/[^a-z\(:;]/i', '', $source);
+ $evilexpr = 'expression|behavior|javascript:|import[^a]' . (!$allow_remote ? '|url\(' : '');
+ if (preg_match("/$evilexpr/i", $stripped)) {
+ return '/* evil! */';
+ }
+
+ // cut out all contents between { and }
+ while (($pos = strpos($source, '{', $last_pos)) && ($pos2 = strpos($source, '}', $pos))) {
+ $styles = substr($source, $pos+1, $pos2-($pos+1));
+
+ // check every line of a style block...
+ if ($allow_remote) {
+ $a_styles = preg_split('/;[\r\n]*/', $styles, -1, PREG_SPLIT_NO_EMPTY);
+ foreach ($a_styles as $line) {
+ $stripped = preg_replace('/[^a-z\(:;]/i', '', $line);
+ // ... and only allow strict url() values
+ $regexp = '!url\s*\([ "\'](https?:)//[a-z0-9/._+-]+["\' ]\)!Uims';
+ if (stripos($stripped, 'url(') && !preg_match($regexp, $line)) {
+ $a_styles = array('/* evil! */');
+ break;
+ }
+ }
+ $styles = join(";\n", $a_styles);
+ }
+
+ $key = $replacements->add($styles);
+ $source = substr($source, 0, $pos+1)
+ . $replacements->get_replacement($key)
+ . substr($source, $pos2, strlen($source)-$pos2);
+ $last_pos = $pos+2;
+ }
+
+ // remove html comments and add #container to each tag selector.
+ // also replace body definition because we also stripped off the <body> tag
+ $styles = preg_replace(
+ array(
+ '/(^\s*<!--)|(-->\s*$)/',
+ '/(^\s*|,\s*|\}\s*)([a-z0-9\._#\*][a-z0-9\.\-_]*)/im',
+ '/'.preg_quote($container_id, '/').'\s+body/i',
+ ),
+ array(
+ '',
+ "\\1#$container_id \\2",
+ $container_id,
+ ),
+ $source);
+
+ // put block contents back in
+ $styles = $replacements->resolve($styles);
+
+ return $styles;
+ }
+
+
+ /**
+ * Generate CSS classes from mimetype and filename extension
+ *
+ * @param string $mimetype Mimetype
+ * @param string $filename Filename
+ *
+ * @return string CSS classes separated by space
+ */
+ public static function file2class($mimetype, $filename)
+ {
+ list($primary, $secondary) = explode('/', $mimetype);
+
+ $classes = array($primary ? $primary : 'unknown');
+ if ($secondary) {
+ $classes[] = $secondary;
+ }
+ if (preg_match('/\.([a-z0-9]+)$/i', $filename, $m)) {
+ $classes[] = $m[1];
+ }
+
+ return strtolower(join(" ", $classes));
+ }
+
+
+ /**
+ * Decode escaped entities used by known XSS exploits.
+ * See http://downloads.securityfocus.com/vulnerabilities/exploits/26800.eml for examples
+ *
+ * @param string CSS content to decode
+ *
+ * @return string Decoded string
+ */
+ public static function xss_entity_decode($content)
+ {
+ $out = html_entity_decode(html_entity_decode($content));
+ $out = preg_replace_callback('/\\\([0-9a-f]{4})/i',
+ array(self, 'xss_entity_decode_callback'), $out);
+ $out = preg_replace('#/\*.*\*/#Ums', '', $out);
+
+ return $out;
+ }
+
+
+ /**
+ * preg_replace_callback callback for xss_entity_decode
+ *
+ * @param array $matches Result from preg_replace_callback
+ *
+ * @return string Decoded entity
+ */
+ public static function xss_entity_decode_callback($matches)
+ {
+ return chr(hexdec($matches[1]));
+ }
+
+
+ /**
+ * Check if we can process not exceeding memory_limit
+ *
+ * @param integer Required amount of memory
+ *
+ * @return boolean True if memory won't be exceeded, False otherwise
+ */
+ public static function mem_check($need)
+ {
+ $mem_limit = parse_bytes(ini_get('memory_limit'));
+ $memory = function_exists('memory_get_usage') ? memory_get_usage() : 16*1024*1024; // safe value: 16MB
+
+ return $mem_limit > 0 && $memory + $need > $mem_limit ? false : true;
+ }
+
+
+ /**
+ * Check if working in SSL mode
+ *
+ * @param integer $port HTTPS port number
+ * @param boolean $use_https Enables 'use_https' option checking
+ *
+ * @return boolean
+ */
+ public static function https_check($port=null, $use_https=true)
+ {
+ global $RCMAIL;
+
+ if (!empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) != 'off') {
+ return true;
+ }
+ if (!empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']) == 'https') {
+ return true;
+ }
+ if ($port && $_SERVER['SERVER_PORT'] == $port) {
+ return true;
+ }
+ if ($use_https && isset($RCMAIL) && $RCMAIL->config->get('use_https')) {
+ return true;
+ }
+
+ return false;
+ }
+
+
+ /**
+ * Replaces hostname variables.
+ *
+ * @param string $name Hostname
+ * @param string $host Optional IMAP hostname
+ *
+ * @return string Hostname
+ */
+ public static function parse_host($name, $host = '')
+ {
+ // %n - host
+ $n = preg_replace('/:\d+$/', '', $_SERVER['SERVER_NAME']);
+ // %d - domain name without first part, e.g. %n=mail.domain.tld, %d=domain.tld
+ $d = preg_replace('/^[^\.]+\./', '', $n);
+ // %h - IMAP host
+ $h = $_SESSION['storage_host'] ? $_SESSION['storage_host'] : $host;
+ // %z - IMAP domain without first part, e.g. %h=imap.domain.tld, %z=domain.tld
+ $z = preg_replace('/^[^\.]+\./', '', $h);
+ // %s - domain name after the '@' from e-mail address provided at login screen. Returns FALSE if an invalid email is provided
+ if (strpos($name, '%s') !== false) {
+ $user_email = self::get_input_value('_user', self::INPUT_POST);
+ $user_email = rcube_idn_convert($user_email, true);
+ $matches = preg_match('/(.*)@([a-z0-9\.\-\[\]\:]+)/i', $user_email, $s);
+ if ($matches < 1 || filter_var($s[1]."@".$s[2], FILTER_VALIDATE_EMAIL) === false) {
+ return false;
+ }
+ }
+
+ $name = str_replace(array('%n', '%d', '%h', '%z', '%s'), array($n, $d, $h, $z, $s[2]), $name);
+ return $name;
+ }
+
+
+ /**
+ * Returns remote IP address and forwarded addresses if found
+ *
+ * @return string Remote IP address(es)
+ */
+ public static function remote_ip()
+ {
+ $address = $_SERVER['REMOTE_ADDR'];
+
+ // append the NGINX X-Real-IP header, if set
+ if (!empty($_SERVER['HTTP_X_REAL_IP'])) {
+ $remote_ip[] = 'X-Real-IP: ' . $_SERVER['HTTP_X_REAL_IP'];
+ }
+ // append the X-Forwarded-For header, if set
+ if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
+ $remote_ip[] = 'X-Forwarded-For: ' . $_SERVER['HTTP_X_FORWARDED_FOR'];
+ }
+
+ if (!empty($remote_ip)) {
+ $address .= '(' . implode(',', $remote_ip) . ')';
+ }
+
+ return $address;
+ }
+
+
+ /**
+ * Read a specific HTTP request header.
+ *
+ * @param string $name Header name
+ *
+ * @return mixed Header value or null if not available
+ */
+ public static function request_header($name)
+ {
+ if (function_exists('getallheaders')) {
+ $hdrs = array_change_key_case(getallheaders(), CASE_UPPER);
+ $key = strtoupper($name);
+ }
+ else {
+ $key = 'HTTP_' . strtoupper(strtr($name, '-', '_'));
+ $hdrs = array_change_key_case($_SERVER, CASE_UPPER);
+ }
+
+ return $hdrs[$key];
+ }
+
+ /**
+ * Explode quoted string
+ *
+ * @param string Delimiter expression string for preg_match()
+ * @param string Input string
+ *
+ * @return array String items
+ */
+ public static function explode_quoted_string($delimiter, $string)
+ {
+ $result = array();
+ $strlen = strlen($string);
+
+ for ($q=$p=$i=0; $i < $strlen; $i++) {
+ if ($string[$i] == "\"" && $string[$i-1] != "\\") {
+ $q = $q ? false : true;
+ }
+ else if (!$q && preg_match("/$delimiter/", $string[$i])) {
+ $result[] = substr($string, $p, $i - $p);
+ $p = $i + 1;
+ }
+ }
+
+ $result[] = substr($string, $p);
+
+ return $result;
+ }
+
+
+ /**
+ * Improved equivalent to strtotime()
+ *
+ * @param string $date Date string
+ *
+ * @return int Unix timestamp
+ */
+ public static function strtotime($date)
+ {
+ // check for MS Outlook vCard date format YYYYMMDD
+ if (preg_match('/^([12][90]\d\d)([01]\d)(\d\d)$/', trim($date), $matches)) {
+ return mktime(0,0,0, intval($matches[2]), intval($matches[3]), intval($matches[1]));
+ }
+ else if (is_numeric($date)) {
+ return $date;
+ }
+
+ // support non-standard "GMTXXXX" literal
+ $date = preg_replace('/GMT\s*([+-][0-9]+)/', '\\1', $date);
+
+ // if date parsing fails, we have a date in non-rfc format.
+ // remove token from the end and try again
+ while ((($ts = @strtotime($date)) === false) || ($ts < 0)) {
+ $d = explode(' ', $date);
+ array_pop($d);
+ if (!$d) {
+ break;
+ }
+ $date = implode(' ', $d);
+ }
+
+ return $ts;
+ }
+
+
+ /*
+ * Idn_to_ascii wrapper.
+ * Intl/Idn modules version of this function doesn't work with e-mail address
+ */
+ public static function idn_to_ascii($str)
+ {
+ return self::idn_convert($str, true);
+ }
+
+
+ /*
+ * Idn_to_ascii wrapper.
+ * Intl/Idn modules version of this function doesn't work with e-mail address
+ */
+ public static function idn_to_utf8($str)
+ {
+ return self::idn_convert($str, false);
+ }
+
+
+ public static function idn_convert($input, $is_utf=false)
+ {
+ if ($at = strpos($input, '@')) {
+ $user = substr($input, 0, $at);
+ $domain = substr($input, $at+1);
+ }
+ else {
+ $domain = $input;
+ }
+
+ $domain = $is_utf ? idn_to_ascii($domain) : idn_to_utf8($domain);
+
+ if ($domain === false) {
+ return '';
+ }
+
+ return $at ? $user . '@' . $domain : $domain;
+ }
+
+}