Misc.php

gehe zur Dokumentation dieser Datei

<?php
class SimplePie_Misc
{
        public static function time_hms($seconds)
        {
                $time = '';

                $hours = floor($seconds / 3600);
                $remainder = $seconds % 3600;
                if ($hours > 0)
                {
                        $time .= $hours.':';
                }

                $minutes = floor($remainder / 60);
                $seconds = $remainder % 60;
                if ($minutes < 10 && $hours > 0)
                {
                        $minutes = '0' . $minutes;
                }
                if ($seconds < 10)
                {
                        $seconds = '0' . $seconds;
                }

                $time .= $minutes.':';
                $time .= $seconds;

                return $time;
        }

        public static function absolutize_url($relative, $base)
        {
                $iri = SimplePie_IRI::absolutize(new SimplePie_IRI($base), $relative);
                if ($iri === false)
                {
                        return false;
                }
                return $iri->get_uri();
        }

        public static function get_element($realname, $string)
        {
                $return = array();
                $name = preg_quote($realname, '/');
                if (preg_match_all("/<($name)" . SIMPLEPIE_PCRE_HTML_ATTRIBUTE . "(>(.*)<\/$name>|(\/)?>)/siU", $string, $matches, PREG_SET_ORDER | PREG_OFFSET_CAPTURE))
                {
                        for ($i = 0, $total_matches = count($matches); $i < $total_matches; $i++)
                        {
                                $return[$i]['tag'] = $realname;
                                $return[$i]['full'] = $matches[$i][0][0];
                                $return[$i]['offset'] = $matches[$i][0][1];
                                if (strlen($matches[$i][3][0]) <= 2)
                                {
                                        $return[$i]['self_closing'] = true;
                                }
                                else
                                {
                                        $return[$i]['self_closing'] = false;
                                        $return[$i]['content'] = $matches[$i][4][0];
                                }
                                $return[$i]['attribs'] = array();
                                if (isset($matches[$i][2][0]) && preg_match_all('/[\x09\x0A\x0B\x0C\x0D\x20]+([^\x09\x0A\x0B\x0C\x0D\x20\x2F\x3E][^\x09\x0A\x0B\x0C\x0D\x20\x2F\x3D\x3E]*)(?:[\x09\x0A\x0B\x0C\x0D\x20]*=[\x09\x0A\x0B\x0C\x0D\x20]*(?:"([^"]*)"|\'([^\']*)\'|([^\x09\x0A\x0B\x0C\x0D\x20\x22\x27\x3E][^\x09\x0A\x0B\x0C\x0D\x20\x3E]*)?))?/', ' ' . $matches[$i][2][0] . ' ', $attribs, PREG_SET_ORDER))
                                {
                                        for ($j = 0, $total_attribs = count($attribs); $j < $total_attribs; $j++)
                                        {
                                                if (count($attribs[$j]) === 2)
                                                {
                                                        $attribs[$j][2] = $attribs[$j][1];
                                                }
                                                $return[$i]['attribs'][strtolower($attribs[$j][1])]['data'] = SimplePie_Misc::entities_decode(end($attribs[$j]), 'UTF-8');
                                        }
                                }
                        }
                }
                return $return;
        }

        public static function element_implode($element)
        {
                $full = "<$element[tag]";
                foreach ($element['attribs'] as $key => $value)
                {
                        $key = strtolower($key);
                        $full .= " $key=\"" . htmlspecialchars($value['data']) . '"';
                }
                if ($element['self_closing'])
                {
                        $full .= ' />';
                }
                else
                {
                        $full .= ">$element[content]</$element[tag]>";
                }
                return $full;
        }

        public static function error($message, $level, $file, $line)
        {
                if ((ini_get('error_reporting') & $level) > 0)
                {
                        switch ($level)
                        {
                                case E_USER_ERROR:
                                        $note = 'PHP Error';
                                        break;
                                case E_USER_WARNING:
                                        $note = 'PHP Warning';
                                        break;
                                case E_USER_NOTICE:
                                        $note = 'PHP Notice';
                                        break;
                                default:
                                        $note = 'Unknown Error';
                                        break;
                        }

                        $log_error = true;
                        if (!function_exists('error_log'))
                        {
                                $log_error = false;
                        }

                        $log_file = @ini_get('error_log');
                        if (!empty($log_file) && ('syslog' !== $log_file) && !@is_writable($log_file))
                        {
                                $log_error = false;
                        }

                        if ($log_error)
                        {
                                @error_log("$note: $message in $file on line $line", 0);
                        }
                }

                return $message;
        }

        public static function fix_protocol($url, $http = 1)
        {
                $url = SimplePie_Misc::normalize_url($url);
                $parsed = SimplePie_Misc::parse_url($url);
                if ($parsed['scheme'] !== '' && $parsed['scheme'] !== 'http' && $parsed['scheme'] !== 'https')
                {
                        return SimplePie_Misc::fix_protocol(SimplePie_Misc::compress_parse_url('http', $parsed['authority'], $parsed['path'], $parsed['query'], $parsed['fragment']), $http);
                }

                if ($parsed['scheme'] === '' && $parsed['authority'] === '' && !file_exists($url))
                {
                        return SimplePie_Misc::fix_protocol(SimplePie_Misc::compress_parse_url('http', $parsed['path'], '', $parsed['query'], $parsed['fragment']), $http);
                }

                if ($http === 2 && $parsed['scheme'] !== '')
                {
                        return "feed:$url";
                }
                elseif ($http === 3 && strtolower($parsed['scheme']) === 'http')
                {
                        return substr_replace($url, 'podcast', 0, 4);
                }
                elseif ($http === 4 && strtolower($parsed['scheme']) === 'http')
                {
                        return substr_replace($url, 'itpc', 0, 4);
                }
                else
                {
                        return $url;
                }
        }

        public static function parse_url($url)
        {
                $iri = new SimplePie_IRI($url);
                return array(
                        'scheme' => (string) $iri->scheme,
                        'authority' => (string) $iri->authority,
                        'path' => (string) $iri->path,
                        'query' => (string) $iri->query,
                        'fragment' => (string) $iri->fragment
                );
        }

        public static function compress_parse_url($scheme = '', $authority = '', $path = '', $query = '', $fragment = '')
        {
                $iri = new SimplePie_IRI('');
                $iri->scheme = $scheme;
                $iri->authority = $authority;
                $iri->path = $path;
                $iri->query = $query;
                $iri->fragment = $fragment;
                return $iri->get_uri();
        }

        public static function normalize_url($url)
        {
                $iri = new SimplePie_IRI($url);
                return $iri->get_uri();
        }

        public static function percent_encoding_normalization($match)
        {
                $integer = hexdec($match[1]);
                if ($integer >= 0x41 && $integer <= 0x5A || $integer >= 0x61 && $integer <= 0x7A || $integer >= 0x30 && $integer <= 0x39 || $integer === 0x2D || $integer === 0x2E || $integer === 0x5F || $integer === 0x7E)
                {
                        return chr($integer);
                }
                else
                {
                        return strtoupper($match[0]);
                }
        }

        public static function windows_1252_to_utf8($string)
        {
                static $convert_table = array("\x80" => "\xE2\x82\xAC", "\x81" => "\xEF\xBF\xBD", "\x82" => "\xE2\x80\x9A", "\x83" => "\xC6\x92", "\x84" => "\xE2\x80\x9E", "\x85" => "\xE2\x80\xA6", "\x86" => "\xE2\x80\xA0", "\x87" => "\xE2\x80\xA1", "\x88" => "\xCB\x86", "\x89" => "\xE2\x80\xB0", "\x8A" => "\xC5\xA0", "\x8B" => "\xE2\x80\xB9", "\x8C" => "\xC5\x92", "\x8D" => "\xEF\xBF\xBD", "\x8E" => "\xC5\xBD", "\x8F" => "\xEF\xBF\xBD", "\x90" => "\xEF\xBF\xBD", "\x91" => "\xE2\x80\x98", "\x92" => "\xE2\x80\x99", "\x93" => "\xE2\x80\x9C", "\x94" => "\xE2\x80\x9D", "\x95" => "\xE2\x80\xA2", "\x96" => "\xE2\x80\x93", "\x97" => "\xE2\x80\x94", "\x98" => "\xCB\x9C", "\x99" => "\xE2\x84\xA2", "\x9A" => "\xC5\xA1", "\x9B" => "\xE2\x80\xBA", "\x9C" => "\xC5\x93", "\x9D" => "\xEF\xBF\xBD", "\x9E" => "\xC5\xBE", "\x9F" => "\xC5\xB8", "\xA0" => "\xC2\xA0", "\xA1" => "\xC2\xA1", "\xA2" => "\xC2\xA2", "\xA3" => "\xC2\xA3", "\xA4" => "\xC2\xA4", "\xA5" => "\xC2\xA5", "\xA6" => "\xC2\xA6", "\xA7" => "\xC2\xA7", "\xA8" => "\xC2\xA8", "\xA9" => "\xC2\xA9", "\xAA" => "\xC2\xAA", "\xAB" => "\xC2\xAB", "\xAC" => "\xC2\xAC", "\xAD" => "\xC2\xAD", "\xAE" => "\xC2\xAE", "\xAF" => "\xC2\xAF", "\xB0" => "\xC2\xB0", "\xB1" => "\xC2\xB1", "\xB2" => "\xC2\xB2", "\xB3" => "\xC2\xB3", "\xB4" => "\xC2\xB4", "\xB5" => "\xC2\xB5", "\xB6" => "\xC2\xB6", "\xB7" => "\xC2\xB7", "\xB8" => "\xC2\xB8", "\xB9" => "\xC2\xB9", "\xBA" => "\xC2\xBA", "\xBB" => "\xC2\xBB", "\xBC" => "\xC2\xBC", "\xBD" => "\xC2\xBD", "\xBE" => "\xC2\xBE", "\xBF" => "\xC2\xBF", "\xC0" => "\xC3\x80", "\xC1" => "\xC3\x81", "\xC2" => "\xC3\x82", "\xC3" => "\xC3\x83", "\xC4" => "\xC3\x84", "\xC5" => "\xC3\x85", "\xC6" => "\xC3\x86", "\xC7" => "\xC3\x87", "\xC8" => "\xC3\x88", "\xC9" => "\xC3\x89", "\xCA" => "\xC3\x8A", "\xCB" => "\xC3\x8B", "\xCC" => "\xC3\x8C", "\xCD" => "\xC3\x8D", "\xCE" => "\xC3\x8E", "\xCF" => "\xC3\x8F", "\xD0" => "\xC3\x90", "\xD1" => "\xC3\x91", "\xD2" => "\xC3\x92", "\xD3" => "\xC3\x93", "\xD4" => "\xC3\x94", "\xD5" => "\xC3\x95", "\xD6" => "\xC3\x96", "\xD7" => "\xC3\x97", "\xD8" => "\xC3\x98", "\xD9" => "\xC3\x99", "\xDA" => "\xC3\x9A", "\xDB" => "\xC3\x9B", "\xDC" => "\xC3\x9C", "\xDD" => "\xC3\x9D", "\xDE" => "\xC3\x9E", "\xDF" => "\xC3\x9F", "\xE0" => "\xC3\xA0", "\xE1" => "\xC3\xA1", "\xE2" => "\xC3\xA2", "\xE3" => "\xC3\xA3", "\xE4" => "\xC3\xA4", "\xE5" => "\xC3\xA5", "\xE6" => "\xC3\xA6", "\xE7" => "\xC3\xA7", "\xE8" => "\xC3\xA8", "\xE9" => "\xC3\xA9", "\xEA" => "\xC3\xAA", "\xEB" => "\xC3\xAB", "\xEC" => "\xC3\xAC", "\xED" => "\xC3\xAD", "\xEE" => "\xC3\xAE", "\xEF" => "\xC3\xAF", "\xF0" => "\xC3\xB0", "\xF1" => "\xC3\xB1", "\xF2" => "\xC3\xB2", "\xF3" => "\xC3\xB3", "\xF4" => "\xC3\xB4", "\xF5" => "\xC3\xB5", "\xF6" => "\xC3\xB6", "\xF7" => "\xC3\xB7", "\xF8" => "\xC3\xB8", "\xF9" => "\xC3\xB9", "\xFA" => "\xC3\xBA", "\xFB" => "\xC3\xBB", "\xFC" => "\xC3\xBC", "\xFD" => "\xC3\xBD", "\xFE" => "\xC3\xBE", "\xFF" => "\xC3\xBF");

                return strtr($string, $convert_table);
        }

        public static function change_encoding($data, $input, $output)
        {
                $input = SimplePie_Misc::encoding($input);
                $output = SimplePie_Misc::encoding($output);

                // We fail to fail on non US-ASCII bytes
                if ($input === 'US-ASCII')
                {
                        static $non_ascii_octects = '';
                        if (!$non_ascii_octects)
                        {
                                for ($i = 0x80; $i <= 0xFF; $i++)
                                {
                                        $non_ascii_octects .= chr($i);
                                }
                        }
                        $data = substr($data, 0, strcspn($data, $non_ascii_octects));
                }

                // This is first, as behaviour of this is completely predictable
                if ($input === 'windows-1252' && $output === 'UTF-8')
                {
                        return SimplePie_Misc::windows_1252_to_utf8($data);
                }
                // This is second, as behaviour of this varies only with PHP version (the middle part of this expression checks the encoding is supported).
                elseif (function_exists('mb_convert_encoding') && ($return = SimplePie_Misc::change_encoding_mbstring($data, $input, $output)))
                {
                        return $return;
                }
                // This is last, as behaviour of this varies with OS userland and PHP version
                elseif (function_exists('iconv') && ($return = SimplePie_Misc::change_encoding_iconv($data, $input, $output)))
                {
                        return $return;
                }
                // If we can't do anything, just fail
                else
                {
                        return false;
                }
        }

        protected static function change_encoding_mbstring($data, $input, $output)
        {
                if ($input === 'windows-949')
                {
                        $input = 'EUC-KR';
                }
                if ($output === 'windows-949')
                {
                        $output = 'EUC-KR';
                }
                if ($input === 'Windows-31J')
                {
                        $input = 'SJIS';
                }
                if ($output === 'Windows-31J')
                {
                        $output = 'SJIS';
                }

                // Check that the encoding is supported
                if (@mb_convert_encoding("\x80", 'UTF-16BE', $input) === "\x00\x80")
                {
                        return false;
                }
                if (!in_array($input, mb_list_encodings()))
                {
                        return false;
                }

                // Let's do some conversion
                if ($return = @mb_convert_encoding($data, $output, $input))
                {
                        return $return;
                }

                return false;
        }

        protected static function change_encoding_iconv($data, $input, $output)
        {
                return @iconv($input, $output, $data);
        }

        public static function encoding($charset)
        {
                // Normalization from UTS #22
                switch (strtolower(preg_replace('/(?:[^a-zA-Z0-9]+|([^0-9])0+)/', '\1', $charset)))
                {
                        case 'adobestandardencoding':
                        case 'csadobestandardencoding':
                                return 'Adobe-Standard-Encoding';

                        case 'adobesymbolencoding':
                        case 'cshppsmath':
                                return 'Adobe-Symbol-Encoding';

                        case 'ami1251':
                        case 'amiga1251':
                                return 'Amiga-1251';

                        case 'ansix31101983':
                        case 'csat5001983':
                        case 'csiso99naplps':
                        case 'isoir99':
                        case 'naplps':
                                return 'ANSI_X3.110-1983';

                        case 'arabic7':
                        case 'asmo449':
                        case 'csiso89asmo449':
                        case 'iso9036':
                        case 'isoir89':
                                return 'ASMO_449';

                        case 'big5':
                        case 'csbig5':
                                return 'Big5';

                        case 'big5hkscs':
                                return 'Big5-HKSCS';

                        case 'bocu1':
                        case 'csbocu1':
                                return 'BOCU-1';

                        case 'brf':
                        case 'csbrf':
                                return 'BRF';

                        case 'bs4730':
                        case 'csiso4unitedkingdom':
                        case 'gb':
                        case 'iso646gb':
                        case 'isoir4':
                        case 'uk':
                                return 'BS_4730';

                        case 'bsviewdata':
                        case 'csiso47bsviewdata':
                        case 'isoir47':
                                return 'BS_viewdata';

                        case 'cesu8':
                        case 'cscesu8':
                                return 'CESU-8';

                        case 'ca':
                        case 'csa71':
                        case 'csaz243419851':
                        case 'csiso121canadian1':
                        case 'iso646ca':
                        case 'isoir121':
                                return 'CSA_Z243.4-1985-1';

                        case 'csa72':
                        case 'csaz243419852':
                        case 'csiso122canadian2':
                        case 'iso646ca2':
                        case 'isoir122':
                                return 'CSA_Z243.4-1985-2';

                        case 'csaz24341985gr':
                        case 'csiso123csaz24341985gr':
                        case 'isoir123':
                                return 'CSA_Z243.4-1985-gr';

                        case 'csiso139csn369103':
                        case 'csn369103':
                        case 'isoir139':
                                return 'CSN_369103';

                        case 'csdecmcs':
                        case 'dec':
                        case 'decmcs':
                                return 'DEC-MCS';

                        case 'csiso21german':
                        case 'de':
                        case 'din66003':
                        case 'iso646de':
                        case 'isoir21':
                                return 'DIN_66003';

                        case 'csdkus':
                        case 'dkus':
                                return 'dk-us';

                        case 'csiso646danish':
                        case 'dk':
                        case 'ds2089':
                        case 'iso646dk':
                                return 'DS_2089';

                        case 'csibmebcdicatde':
                        case 'ebcdicatde':
                                return 'EBCDIC-AT-DE';

                        case 'csebcdicatdea':
                        case 'ebcdicatdea':
                                return 'EBCDIC-AT-DE-A';

                        case 'csebcdiccafr':
                        case 'ebcdiccafr':
                                return 'EBCDIC-CA-FR';

                        case 'csebcdicdkno':
                        case 'ebcdicdkno':
                                return 'EBCDIC-DK-NO';

                        case 'csebcdicdknoa':
                        case 'ebcdicdknoa':
                                return 'EBCDIC-DK-NO-A';

                        case 'csebcdices':
                        case 'ebcdices':
                                return 'EBCDIC-ES';

                        case 'csebcdicesa':
                        case 'ebcdicesa':
                                return 'EBCDIC-ES-A';

                        case 'csebcdicess':
                        case 'ebcdicess':
                                return 'EBCDIC-ES-S';

                        case 'csebcdicfise':
                        case 'ebcdicfise':
                                return 'EBCDIC-FI-SE';

                        case 'csebcdicfisea':
                        case 'ebcdicfisea':
                                return 'EBCDIC-FI-SE-A';

                        case 'csebcdicfr':
                        case 'ebcdicfr':
                                return 'EBCDIC-FR';

                        case 'csebcdicit':
                        case 'ebcdicit':
                                return 'EBCDIC-IT';

                        case 'csebcdicpt':
                        case 'ebcdicpt':
                                return 'EBCDIC-PT';

                        case 'csebcdicuk':
                        case 'ebcdicuk':
                                return 'EBCDIC-UK';

                        case 'csebcdicus':
                        case 'ebcdicus':
                                return 'EBCDIC-US';

                        case 'csiso111ecmacyrillic':
                        case 'ecmacyrillic':
                        case 'isoir111':
                        case 'koi8e':
                                return 'ECMA-cyrillic';

                        case 'csiso17spanish':
                        case 'es':
                        case 'iso646es':
                        case 'isoir17':
                                return 'ES';

                        case 'csiso85spanish2':
                        case 'es2':
                        case 'iso646es2':
                        case 'isoir85':
                                return 'ES2';

                        case 'cseucpkdfmtjapanese':
                        case 'eucjp':
                        case 'extendedunixcodepackedformatforjapanese':
                                return 'EUC-JP';

                        case 'cseucfixwidjapanese':
                        case 'extendedunixcodefixedwidthforjapanese':
                                return 'Extended_UNIX_Code_Fixed_Width_for_Japanese';

                        case 'gb18030':
                                return 'GB18030';

                        case 'chinese':
                        case 'cp936':
                        case 'csgb2312':
                        case 'csiso58gb231280':
                        case 'gb2312':
                        case 'gb231280':
                        case 'gbk':
                        case 'isoir58':
                        case 'ms936':
                        case 'windows936':
                                return 'GBK';

                        case 'cn':
                        case 'csiso57gb1988':
                        case 'gb198880':
                        case 'iso646cn':
                        case 'isoir57':
                                return 'GB_1988-80';

                        case 'csiso153gost1976874':
                        case 'gost1976874':
                        case 'isoir153':
                        case 'stsev35888':
                                return 'GOST_19768-74';

                        case 'csiso150':
                        case 'csiso150greekccitt':
                        case 'greekccitt':
                        case 'isoir150':
                                return 'greek-ccitt';

                        case 'csiso88greek7':
                        case 'greek7':
                        case 'isoir88':
                                return 'greek7';

                        case 'csiso18greek7old':
                        case 'greek7old':
                        case 'isoir18':
                                return 'greek7-old';

                        case 'cshpdesktop':
                        case 'hpdesktop':
                                return 'HP-DeskTop';

                        case 'cshplegal':
                        case 'hplegal':
                                return 'HP-Legal';

                        case 'cshpmath8':
                        case 'hpmath8':
                                return 'HP-Math8';

                        case 'cshppifont':
                        case 'hppifont':
                                return 'HP-Pi-font';

                        case 'cshproman8':
                        case 'hproman8':
                        case 'r8':
                        case 'roman8':
                                return 'hp-roman8';

                        case 'hzgb2312':
                                return 'HZ-GB-2312';

                        case 'csibmsymbols':
                        case 'ibmsymbols':
                                return 'IBM-Symbols';

                        case 'csibmthai':
                        case 'ibmthai':
                                return 'IBM-Thai';

                        case 'cp37':
                        case 'csibm37':
                        case 'ebcdiccpca':
                        case 'ebcdiccpnl':
                        case 'ebcdiccpus':
                        case 'ebcdiccpwt':
                        case 'ibm37':
                                return 'IBM037';

                        case 'cp38':
                        case 'csibm38':
                        case 'ebcdicint':
                        case 'ibm38':
                                return 'IBM038';

                        case 'cp273':
                        case 'csibm273':
                        case 'ibm273':
                                return 'IBM273';

                        case 'cp274':
                        case 'csibm274':
                        case 'ebcdicbe':
                        case 'ibm274':
                                return 'IBM274';

                        case 'cp275':
                        case 'csibm275':
                        case 'ebcdicbr':
                        case 'ibm275':
                                return 'IBM275';

                        case 'csibm277':
                        case 'ebcdiccpdk':
                        case 'ebcdiccpno':
                        case 'ibm277':
                                return 'IBM277';

                        case 'cp278':
                        case 'csibm278':
                        case 'ebcdiccpfi':
                        case 'ebcdiccpse':
                        case 'ibm278':
                                return 'IBM278';

                        case 'cp280':
                        case 'csibm280':
                        case 'ebcdiccpit':
                        case 'ibm280':
                                return 'IBM280';

                        case 'cp281':
                        case 'csibm281':
                        case 'ebcdicjpe':
                        case 'ibm281':
                                return 'IBM281';

                        case 'cp284':
                        case 'csibm284':
                        case 'ebcdiccpes':
                        case 'ibm284':
                                return 'IBM284';

                        case 'cp285':
                        case 'csibm285':
                        case 'ebcdiccpgb':
                        case 'ibm285':
                                return 'IBM285';

                        case 'cp290':
                        case 'csibm290':
                        case 'ebcdicjpkana':
                        case 'ibm290':
                                return 'IBM290';

                        case 'cp297':
                        case 'csibm297':
                        case 'ebcdiccpfr':
                        case 'ibm297':
                                return 'IBM297';

                        case 'cp420':
                        case 'csibm420':
                        case 'ebcdiccpar1':
                        case 'ibm420':
                                return 'IBM420';

                        case 'cp423':
                        case 'csibm423':
                        case 'ebcdiccpgr':
                        case 'ibm423':
                                return 'IBM423';

                        case 'cp424':
                        case 'csibm424':
                        case 'ebcdiccphe':
                        case 'ibm424':
                                return 'IBM424';

                        case '437':
                        case 'cp437':
                        case 'cspc8codepage437':
                        case 'ibm437':
                                return 'IBM437';

                        case 'cp500':
                        case 'csibm500':
                        case 'ebcdiccpbe':
                        case 'ebcdiccpch':
                        case 'ibm500':
                                return 'IBM500';

                        case 'cp775':
                        case 'cspc775baltic':
                        case 'ibm775':
                                return 'IBM775';

                        case '850':
                        case 'cp850':
                        case 'cspc850multilingual':
                        case 'ibm850':
                                return 'IBM850';

                        case '851':
                        case 'cp851':
                        case 'csibm851':
                        case 'ibm851':
                                return 'IBM851';

                        case '852':
                        case 'cp852':
                        case 'cspcp852':
                        case 'ibm852':
                                return 'IBM852';

                        case '855':
                        case 'cp855':
                        case 'csibm855':
                        case 'ibm855':
                                return 'IBM855';

                        case '857':
                        case 'cp857':
                        case 'csibm857':
                        case 'ibm857':
                                return 'IBM857';

                        case 'ccsid858':
                        case 'cp858':
                        case 'ibm858':
                        case 'pcmultilingual850euro':
                                return 'IBM00858';

                        case '860':
                        case 'cp860':
                        case 'csibm860':
                        case 'ibm860':
                                return 'IBM860';

                        case '861':
                        case 'cp861':
                        case 'cpis':
                        case 'csibm861':
                        case 'ibm861':
                                return 'IBM861';

                        case '862':
                        case 'cp862':
                        case 'cspc862latinhebrew':
                        case 'ibm862':
                                return 'IBM862';

                        case '863':
                        case 'cp863':
                        case 'csibm863':
                        case 'ibm863':
                                return 'IBM863';

                        case 'cp864':
                        case 'csibm864':
                        case 'ibm864':
                                return 'IBM864';

                        case '865':
                        case 'cp865':
                        case 'csibm865':
                        case 'ibm865':
                                return 'IBM865';

                        case '866':
                        case 'cp866':
                        case 'csibm866':
                        case 'ibm866':
                                return 'IBM866';

                        case 'cp868':
                        case 'cpar':
                        case 'csibm868':
                        case 'ibm868':
                                return 'IBM868';

                        case '869':
                        case 'cp869':
                        case 'cpgr':
                        case 'csibm869':
                        case 'ibm869':
                                return 'IBM869';

                        case 'cp870':
                        case 'csibm870':
                        case 'ebcdiccproece':
                        case 'ebcdiccpyu':
                        case 'ibm870':
                                return 'IBM870';

                        case 'cp871':
                        case 'csibm871':
                        case 'ebcdiccpis':
                        case 'ibm871':
                                return 'IBM871';

                        case 'cp880':
                        case 'csibm880':
                        case 'ebcdiccyrillic':
                        case 'ibm880':
                                return 'IBM880';

                        case 'cp891':
                        case 'csibm891':
                        case 'ibm891':
                                return 'IBM891';

                        case 'cp903':
                        case 'csibm903':
                        case 'ibm903':
                                return 'IBM903';

                        case '904':
                        case 'cp904':
                        case 'csibbm904':
                        case 'ibm904':
                                return 'IBM904';

                        case 'cp905':
                        case 'csibm905':
                        case 'ebcdiccptr':
                        case 'ibm905':
                                return 'IBM905';

                        case 'cp918':
                        case 'csibm918':
                        case 'ebcdiccpar2':
                        case 'ibm918':
                                return 'IBM918';

                        case 'ccsid924':
                        case 'cp924':
                        case 'ebcdiclatin9euro':
                        case 'ibm924':
                                return 'IBM00924';

                        case 'cp1026':
                        case 'csibm1026':
                        case 'ibm1026':
                                return 'IBM1026';

                        case 'ibm1047':
                                return 'IBM1047';

                        case 'ccsid1140':
                        case 'cp1140':
                        case 'ebcdicus37euro':
                        case 'ibm1140':
                                return 'IBM01140';

                        case 'ccsid1141':
                        case 'cp1141':
                        case 'ebcdicde273euro':
                        case 'ibm1141':
                                return 'IBM01141';

                        case 'ccsid1142':
                        case 'cp1142':
                        case 'ebcdicdk277euro':
                        case 'ebcdicno277euro':
                        case 'ibm1142':
                                return 'IBM01142';

                        case 'ccsid1143':
                        case 'cp1143':
                        case 'ebcdicfi278euro':
                        case 'ebcdicse278euro':
                        case 'ibm1143':
                                return 'IBM01143';

                        case 'ccsid1144':
                        case 'cp1144':
                        case 'ebcdicit280euro':
                        case 'ibm1144':
                                return 'IBM01144';

                        case 'ccsid1145':
                        case 'cp1145':
                        case 'ebcdices284euro':
                        case 'ibm1145':
                                return 'IBM01145';

                        case 'ccsid1146':
                        case 'cp1146':
                        case 'ebcdicgb285euro':
                        case 'ibm1146':
                                return 'IBM01146';

                        case 'ccsid1147':
                        case 'cp1147':
                        case 'ebcdicfr297euro':
                        case 'ibm1147':
                                return 'IBM01147';

                        case 'ccsid1148':
                        case 'cp1148':
                        case 'ebcdicinternational500euro':
                        case 'ibm1148':
                                return 'IBM01148';

                        case 'ccsid1149':
                        case 'cp1149':
                        case 'ebcdicis871euro':
                        case 'ibm1149':
                                return 'IBM01149';

                        case 'csiso143iecp271':
                        case 'iecp271':
                        case 'isoir143':
                                return 'IEC_P27-1';

                        case 'csiso49inis':
                        case 'inis':
                        case 'isoir49':
                                return 'INIS';

                        case 'csiso50inis8':
                        case 'inis8':
                        case 'isoir50':
                                return 'INIS-8';

                        case 'csiso51iniscyrillic':
                        case 'iniscyrillic':
                        case 'isoir51':
                                return 'INIS-cyrillic';

                        case 'csinvariant':
                        case 'invariant':
                                return 'INVARIANT';

                        case 'iso2022cn':
                                return 'ISO-2022-CN';

                        case 'iso2022cnext':
                                return 'ISO-2022-CN-EXT';

                        case 'csiso2022jp':
                        case 'iso2022jp':
                                return 'ISO-2022-JP';

                        case 'csiso2022jp2':
                        case 'iso2022jp2':
                                return 'ISO-2022-JP-2';

                        case 'csiso2022kr':
                        case 'iso2022kr':
                                return 'ISO-2022-KR';

                        case 'cswindows30latin1':
                        case 'iso88591windows30latin1':
                                return 'ISO-8859-1-Windows-3.0-Latin-1';

                        case 'cswindows31latin1':
                        case 'iso88591windows31latin1':
                                return 'ISO-8859-1-Windows-3.1-Latin-1';

                        case 'csisolatin2':
                        case 'iso88592':
                        case 'iso885921987':
                        case 'isoir101':
                        case 'l2':
                        case 'latin2':
                                return 'ISO-8859-2';

                        case 'cswindows31latin2':
                        case 'iso88592windowslatin2':
                                return 'ISO-8859-2-Windows-Latin-2';

                        case 'csisolatin3':
                        case 'iso88593':
                        case 'iso885931988':
                        case 'isoir109':
                        case 'l3':
                        case 'latin3':
                                return 'ISO-8859-3';

                        case 'csisolatin4':
                        case 'iso88594':
                        case 'iso885941988':
                        case 'isoir110':
                        case 'l4':
                        case 'latin4':
                                return 'ISO-8859-4';

                        case 'csisolatincyrillic':
                        case 'cyrillic':
                        case 'iso88595':
                        case 'iso885951988':
                        case 'isoir144':
                                return 'ISO-8859-5';

                        case 'arabic':
                        case 'asmo708':
                        case 'csisolatinarabic':
                        case 'ecma114':
                        case 'iso88596':
                        case 'iso885961987':
                        case 'isoir127':
                                return 'ISO-8859-6';

                        case 'csiso88596e':
                        case 'iso88596e':
                                return 'ISO-8859-6-E';

                        case 'csiso88596i':
                        case 'iso88596i':
                                return 'ISO-8859-6-I';

                        case 'csisolatingreek':
                        case 'ecma118':
                        case 'elot928':
                        case 'greek':
                        case 'greek8':
                        case 'iso88597':
                        case 'iso885971987':
                        case 'isoir126':
                                return 'ISO-8859-7';

                        case 'csisolatinhebrew':
                        case 'hebrew':
                        case 'iso88598':
                        case 'iso885981988':
                        case 'isoir138':
                                return 'ISO-8859-8';

                        case 'csiso88598e':
                        case 'iso88598e':
                                return 'ISO-8859-8-E';

                        case 'csiso88598i':
                        case 'iso88598i':
                                return 'ISO-8859-8-I';

                        case 'cswindows31latin5':
                        case 'iso88599windowslatin5':
                                return 'ISO-8859-9-Windows-Latin-5';

                        case 'csisolatin6':
                        case 'iso885910':
                        case 'iso8859101992':
                        case 'isoir157':
                        case 'l6':
                        case 'latin6':
                                return 'ISO-8859-10';

                        case 'iso885913':
                                return 'ISO-8859-13';

                        case 'iso885914':
                        case 'iso8859141998':
                        case 'isoceltic':
                        case 'isoir199':
                        case 'l8':
                        case 'latin8':
                                return 'ISO-8859-14';

                        case 'iso885915':
                        case 'latin9':
                                return 'ISO-8859-15';

                        case 'iso885916':
                        case 'iso8859162001':
                        case 'isoir226':
                        case 'l10':
                        case 'latin10':
                                return 'ISO-8859-16';

                        case 'iso10646j1':
                                return 'ISO-10646-J-1';

                        case 'csunicode':
                        case 'iso10646ucs2':
                                return 'ISO-10646-UCS-2';

                        case 'csucs4':
                        case 'iso10646ucs4':
                                return 'ISO-10646-UCS-4';

                        case 'csunicodeascii':
                        case 'iso10646ucsbasic':
                                return 'ISO-10646-UCS-Basic';

                        case 'csunicodelatin1':
                        case 'iso10646':
                        case 'iso10646unicodelatin1':
                                return 'ISO-10646-Unicode-Latin1';

                        case 'csiso10646utf1':
                        case 'iso10646utf1':
                                return 'ISO-10646-UTF-1';

                        case 'csiso115481':
                        case 'iso115481':
                        case 'isotr115481':
                                return 'ISO-11548-1';

                        case 'csiso90':
                        case 'isoir90':
                                return 'iso-ir-90';

                        case 'csunicodeibm1261':
                        case 'isounicodeibm1261':
                                return 'ISO-Unicode-IBM-1261';

                        case 'csunicodeibm1264':
                        case 'isounicodeibm1264':
                                return 'ISO-Unicode-IBM-1264';

                        case 'csunicodeibm1265':
                        case 'isounicodeibm1265':
                                return 'ISO-Unicode-IBM-1265';

                        case 'csunicodeibm1268':
                        case 'isounicodeibm1268':
                                return 'ISO-Unicode-IBM-1268';

                        case 'csunicodeibm1276':
                        case 'isounicodeibm1276':
                                return 'ISO-Unicode-IBM-1276';

                        case 'csiso646basic1983':
                        case 'iso646basic1983':
                        case 'ref':
                                return 'ISO_646.basic:1983';

                        case 'csiso2intlrefversion':
                        case 'irv':
                        case 'iso646irv1983':
                        case 'isoir2':
                                return 'ISO_646.irv:1983';

                        case 'csiso2033':
                        case 'e13b':
                        case 'iso20331983':
                        case 'isoir98':
                                return 'ISO_2033-1983';

                        case 'csiso5427cyrillic':
                        case 'iso5427':
                        case 'isoir37':
                                return 'ISO_5427';

                        case 'iso5427cyrillic1981':
                        case 'iso54271981':
                        case 'isoir54':
                                return 'ISO_5427:1981';

                        case 'csiso5428greek':
                        case 'iso54281980':
                        case 'isoir55':
                                return 'ISO_5428:1980';

                        case 'csiso6937add':
                        case 'iso6937225':
                        case 'isoir152':
                                return 'ISO_6937-2-25';

                        case 'csisotextcomm':
                        case 'iso69372add':
                        case 'isoir142':
                                return 'ISO_6937-2-add';

                        case 'csiso8859supp':
                        case 'iso8859supp':
                        case 'isoir154':
                        case 'latin125':
                                return 'ISO_8859-supp';

                        case 'csiso10367box':
                        case 'iso10367box':
                        case 'isoir155':
                                return 'ISO_10367-box';

                        case 'csiso15italian':
                        case 'iso646it':
                        case 'isoir15':
                        case 'it':
                                return 'IT';

                        case 'csiso13jisc6220jp':
                        case 'isoir13':
                        case 'jisc62201969':
                        case 'jisc62201969jp':
                        case 'katakana':
                        case 'x2017':
                                return 'JIS_C6220-1969-jp';

                        case 'csiso14jisc6220ro':
                        case 'iso646jp':
                        case 'isoir14':
                        case 'jisc62201969ro':
                        case 'jp':
                                return 'JIS_C6220-1969-ro';

                        case 'csiso42jisc62261978':
                        case 'isoir42':
                        case 'jisc62261978':
                                return 'JIS_C6226-1978';

                        case 'csiso87jisx208':
                        case 'isoir87':
                        case 'jisc62261983':
                        case 'jisx2081983':
                        case 'x208':
                                return 'JIS_C6226-1983';

                        case 'csiso91jisc62291984a':
                        case 'isoir91':
                        case 'jisc62291984a':
                        case 'jpocra':
                                return 'JIS_C6229-1984-a';

                        case 'csiso92jisc62991984b':
                        case 'iso646jpocrb':
                        case 'isoir92':
                        case 'jisc62291984b':
                        case 'jpocrb':
                                return 'JIS_C6229-1984-b';

                        case 'csiso93jis62291984badd':
                        case 'isoir93':
                        case 'jisc62291984badd':
                        case 'jpocrbadd':
                                return 'JIS_C6229-1984-b-add';

                        case 'csiso94jis62291984hand':
                        case 'isoir94':
                        case 'jisc62291984hand':
                        case 'jpocrhand':
                                return 'JIS_C6229-1984-hand';

                        case 'csiso95jis62291984handadd':
                        case 'isoir95':
                        case 'jisc62291984handadd':
                        case 'jpocrhandadd':
                                return 'JIS_C6229-1984-hand-add';

                        case 'csiso96jisc62291984kana':
                        case 'isoir96':
                        case 'jisc62291984kana':
                                return 'JIS_C6229-1984-kana';

                        case 'csjisencoding':
                        case 'jisencoding':
                                return 'JIS_Encoding';

                        case 'cshalfwidthkatakana':
                        case 'jisx201':
                        case 'x201':
                                return 'JIS_X0201';

                        case 'csiso159jisx2121990':
                        case 'isoir159':
                        case 'jisx2121990':
                        case 'x212':
                                return 'JIS_X0212-1990';

                        case 'csiso141jusib1002':
                        case 'iso646yu':
                        case 'isoir141':
                        case 'js':
                        case 'jusib1002':
                        case 'yu':
                                return 'JUS_I.B1.002';

                        case 'csiso147macedonian':
                        case 'isoir147':
                        case 'jusib1003mac':
                        case 'macedonian':
                                return 'JUS_I.B1.003-mac';

                        case 'csiso146serbian':
                        case 'isoir146':
                        case 'jusib1003serb':
                        case 'serbian':
                                return 'JUS_I.B1.003-serb';

                        case 'koi7switched':
                                return 'KOI7-switched';

                        case 'cskoi8r':
                        case 'koi8r':
                                return 'KOI8-R';

                        case 'koi8u':
                                return 'KOI8-U';

                        case 'csksc5636':
                        case 'iso646kr':
                        case 'ksc5636':
                                return 'KSC5636';

                        case 'cskz1048':
                        case 'kz1048':
                        case 'rk1048':
                        case 'strk10482002':
                                return 'KZ-1048';

                        case 'csiso19latingreek':
                        case 'isoir19':
                        case 'latingreek':
                                return 'latin-greek';

                        case 'csiso27latingreek1':
                        case 'isoir27':
                        case 'latingreek1':
                                return 'Latin-greek-1';

                        case 'csiso158lap':
                        case 'isoir158':
                        case 'lap':
                        case 'latinlap':
                                return 'latin-lap';

                        case 'csmacintosh':
                        case 'mac':
                        case 'macintosh':
                                return 'macintosh';

                        case 'csmicrosoftpublishing':
                        case 'microsoftpublishing':
                                return 'Microsoft-Publishing';

                        case 'csmnem':
                        case 'mnem':
                                return 'MNEM';

                        case 'csmnemonic':
                        case 'mnemonic':
                                return 'MNEMONIC';

                        case 'csiso86hungarian':
                        case 'hu':
                        case 'iso646hu':
                        case 'isoir86':
                        case 'msz77953':
                                return 'MSZ_7795.3';

                        case 'csnatsdano':
                        case 'isoir91':
                        case 'natsdano':
                                return 'NATS-DANO';

                        case 'csnatsdanoadd':
                        case 'isoir92':
                        case 'natsdanoadd':
                                return 'NATS-DANO-ADD';

                        case 'csnatssefi':
                        case 'isoir81':
                        case 'natssefi':
                                return 'NATS-SEFI';

                        case 'csnatssefiadd':
                        case 'isoir82':
                        case 'natssefiadd':
                                return 'NATS-SEFI-ADD';

                        case 'csiso151cuba':
                        case 'cuba':
                        case 'iso646cu':
                        case 'isoir151':
                        case 'ncnc1081':
                                return 'NC_NC00-10:81';

                        case 'csiso69french':
                        case 'fr':
                        case 'iso646fr':
                        case 'isoir69':
                        case 'nfz62010':
                                return 'NF_Z_62-010';

                        case 'csiso25french':
                        case 'iso646fr1':
                        case 'isoir25':
                        case 'nfz620101973':
                                return 'NF_Z_62-010_(1973)';

                        case 'csiso60danishnorwegian':
                        case 'csiso60norwegian1':
                        case 'iso646no':
                        case 'isoir60':
                        case 'no':
                        case 'ns45511':
                                return 'NS_4551-1';

                        case 'csiso61norwegian2':
                        case 'iso646no2':
                        case 'isoir61':
                        case 'no2':
                        case 'ns45512':
                                return 'NS_4551-2';

                        case 'osdebcdicdf3irv':
                                return 'OSD_EBCDIC_DF03_IRV';

                        case 'osdebcdicdf41':
                                return 'OSD_EBCDIC_DF04_1';

                        case 'osdebcdicdf415':
                                return 'OSD_EBCDIC_DF04_15';

                        case 'cspc8danishnorwegian':
                        case 'pc8danishnorwegian':
                                return 'PC8-Danish-Norwegian';

                        case 'cspc8turkish':
                        case 'pc8turkish':
                                return 'PC8-Turkish';

                        case 'csiso16portuguese':
                        case 'iso646pt':
                        case 'isoir16':
                        case 'pt':
                                return 'PT';

                        case 'csiso84portuguese2':
                        case 'iso646pt2':
                        case 'isoir84':
                        case 'pt2':
                                return 'PT2';

                        case 'cp154':
                        case 'csptcp154':
                        case 'cyrillicasian':
                        case 'pt154':
                        case 'ptcp154':
                                return 'PTCP154';

                        case 'scsu':
                                return 'SCSU';

                        case 'csiso10swedish':
                        case 'fi':
                        case 'iso646fi':
                        case 'iso646se':
                        case 'isoir10':
                        case 'se':
                        case 'sen850200b':
                                return 'SEN_850200_B';

                        case 'csiso11swedishfornames':
                        case 'iso646se2':
                        case 'isoir11':
                        case 'se2':
                        case 'sen850200c':
                                return 'SEN_850200_C';

                        case 'csiso102t617bit':
                        case 'isoir102':
                        case 't617bit':
                                return 'T.61-7bit';

                        case 'csiso103t618bit':
                        case 'isoir103':
                        case 't61':
                        case 't618bit':
                                return 'T.61-8bit';

                        case 'csiso128t101g2':
                        case 'isoir128':
                        case 't101g2':
                                return 'T.101-G2';

                        case 'cstscii':
                        case 'tscii':
                                return 'TSCII';

                        case 'csunicode11':
                        case 'unicode11':
                                return 'UNICODE-1-1';

                        case 'csunicode11utf7':
                        case 'unicode11utf7':
                                return 'UNICODE-1-1-UTF-7';

                        case 'csunknown8bit':
                        case 'unknown8bit':
                                return 'UNKNOWN-8BIT';

                        case 'ansix341968':
                        case 'ansix341986':
                        case 'ascii':
                        case 'cp367':
                        case 'csascii':
                        case 'ibm367':
                        case 'iso646irv1991':
                        case 'iso646us':
                        case 'isoir6':
                        case 'us':
                        case 'usascii':
                                return 'US-ASCII';

                        case 'csusdk':
                        case 'usdk':
                                return 'us-dk';

                        case 'utf7':
                                return 'UTF-7';

                        case 'utf8':
                                return 'UTF-8';

                        case 'utf16':
                                return 'UTF-16';

                        case 'utf16be':
                                return 'UTF-16BE';

                        case 'utf16le':
                                return 'UTF-16LE';

                        case 'utf32':
                                return 'UTF-32';

                        case 'utf32be':
                                return 'UTF-32BE';

                        case 'utf32le':
                                return 'UTF-32LE';

                        case 'csventurainternational':
                        case 'venturainternational':
                                return 'Ventura-International';

                        case 'csventuramath':
                        case 'venturamath':
                                return 'Ventura-Math';

                        case 'csventuraus':
                        case 'venturaus':
                                return 'Ventura-US';

                        case 'csiso70videotexsupp1':
                        case 'isoir70':
                        case 'videotexsuppl':
                                return 'videotex-suppl';

                        case 'csviqr':
                        case 'viqr':
                                return 'VIQR';

                        case 'csviscii':
                        case 'viscii':
                                return 'VISCII';

                        case 'csshiftjis':
                        case 'cswindows31j':
                        case 'mskanji':
                        case 'shiftjis':
                        case 'windows31j':
                                return 'Windows-31J';

                        case 'iso885911':
                        case 'tis620':
                                return 'windows-874';

                        case 'cseuckr':
                        case 'csksc56011987':
                        case 'euckr':
                        case 'isoir149':
                        case 'korean':
                        case 'ksc5601':
                        case 'ksc56011987':
                        case 'ksc56011989':
                        case 'windows949':
                                return 'windows-949';

                        case 'windows1250':
                                return 'windows-1250';

                        case 'windows1251':
                                return 'windows-1251';

                        case 'cp819':
                        case 'csisolatin1':
                        case 'ibm819':
                        case 'iso88591':
                        case 'iso885911987':
                        case 'isoir100':
                        case 'l1':
                        case 'latin1':
                        case 'windows1252':
                                return 'windows-1252';

                        case 'windows1253':
                                return 'windows-1253';

                        case 'csisolatin5':
                        case 'iso88599':
                        case 'iso885991989':
                        case 'isoir148':
                        case 'l5':
                        case 'latin5':
                        case 'windows1254':
                                return 'windows-1254';

                        case 'windows1255':
                                return 'windows-1255';

                        case 'windows1256':
                                return 'windows-1256';

                        case 'windows1257':
                                return 'windows-1257';

                        case 'windows1258':
                                return 'windows-1258';

                        default:
                                return $charset;
                }
        }

        public static function get_curl_version()
        {
                if (is_array($curl = curl_version()))
                {
                        $curl = $curl['version'];
                }
                elseif (substr($curl, 0, 5) === 'curl/')
                {
                        $curl = substr($curl, 5, strcspn($curl, "\x09\x0A\x0B\x0C\x0D", 5));
                }
                elseif (substr($curl, 0, 8) === 'libcurl/')
                {
                        $curl = substr($curl, 8, strcspn($curl, "\x09\x0A\x0B\x0C\x0D", 8));
                }
                else
                {
                        $curl = 0;
                }
                return $curl;
        }

        public static function strip_comments($data)
        {
                $output = '';
                while (($start = strpos($data, '<!--')) !== false)
                {
                        $output .= substr($data, 0, $start);
                        if (($end = strpos($data, '-->', $start)) !== false)
                        {
                                $data = substr_replace($data, '', 0, $end + 3);
                        }
                        else
                        {
                                $data = '';
                        }
                }
                return $output . $data;
        }

        public static function parse_date($dt)
        {
                $parser = SimplePie_Parse_Date::get();
                return $parser->parse($dt);
        }

        public static function entities_decode($data)
        {
                $decoder = new SimplePie_Decode_HTML_Entities($data);
                return $decoder->parse();
        }

        public static function uncomment_rfc822($string)
        {
                $string = (string) $string;
                $position = 0;
                $length = strlen($string);
                $depth = 0;

                $output = '';

                while ($position < $length && ($pos = strpos($string, '(', $position)) !== false)
                {
                        $output .= substr($string, $position, $pos - $position);
                        $position = $pos + 1;
                        if ($string[$pos - 1] !== '\\')
                        {
                                $depth++;
                                while ($depth && $position < $length)
                                {
                                        $position += strcspn($string, '()', $position);
                                        if ($string[$position - 1] === '\\')
                                        {
                                                $position++;
                                                continue;
                                        }
                                        elseif (isset($string[$position]))
                                        {
                                                switch ($string[$position])
                                                {
                                                        case '(':
                                                                $depth++;
                                                                break;

                                                        case ')':
                                                                $depth--;
                                                                break;
                                                }
                                                $position++;
                                        }
                                        else
                                        {
                                                break;
                                        }
                                }
                        }
                        else
                        {
                                $output .= '(';
                        }
                }
                $output .= substr($string, $position);

                return $output;
        }

        public static function parse_mime($mime)
        {
                if (($pos = strpos($mime, ';')) === false)
                {
                        return trim($mime);
                }
                else
                {
                        return trim(substr($mime, 0, $pos));
                }
        }

        public static function atom_03_construct_type($attribs)
        {
                if (isset($attribs['']['mode']) && strtolower(trim($attribs['']['mode']) === 'base64'))
                {
                        $mode = SIMPLEPIE_CONSTRUCT_BASE64;
                }
                else
                {
                        $mode = SIMPLEPIE_CONSTRUCT_NONE;
                }
                if (isset($attribs['']['type']))
                {
                        switch (strtolower(trim($attribs['']['type'])))
                        {
                                case 'text':
                                case 'text/plain':
                                        return SIMPLEPIE_CONSTRUCT_TEXT | $mode;

                                case 'html':
                                case 'text/html':
                                        return SIMPLEPIE_CONSTRUCT_HTML | $mode;

                                case 'xhtml':
                                case 'application/xhtml+xml':
                                        return SIMPLEPIE_CONSTRUCT_XHTML | $mode;

                                default:
                                        return SIMPLEPIE_CONSTRUCT_NONE | $mode;
                        }
                }
                else
                {
                        return SIMPLEPIE_CONSTRUCT_TEXT | $mode;
                }
        }

        public static function atom_10_construct_type($attribs)
        {
                if (isset($attribs['']['type']))
                {
                        switch (strtolower(trim($attribs['']['type'])))
                        {
                                case 'text':
                                        return SIMPLEPIE_CONSTRUCT_TEXT;

                                case 'html':
                                        return SIMPLEPIE_CONSTRUCT_HTML;

                                case 'xhtml':
                                        return SIMPLEPIE_CONSTRUCT_XHTML;

                                default:
                                        return SIMPLEPIE_CONSTRUCT_NONE;
                        }
                }
                return SIMPLEPIE_CONSTRUCT_TEXT;
        }

        public static function atom_10_content_construct_type($attribs)
        {
                if (isset($attribs['']['type']))
                {
                        $type = strtolower(trim($attribs['']['type']));
                        switch ($type)
                        {
                                case 'text':
                                        return SIMPLEPIE_CONSTRUCT_TEXT;

                                case 'html':
                                        return SIMPLEPIE_CONSTRUCT_HTML;

                                case 'xhtml':
                                        return SIMPLEPIE_CONSTRUCT_XHTML;
                        }
                        if (in_array(substr($type, -4), array('+xml', '/xml')) || substr($type, 0, 5) === 'text/')
                        {
                                return SIMPLEPIE_CONSTRUCT_NONE;
                        }
                        else
                        {
                                return SIMPLEPIE_CONSTRUCT_BASE64;
                        }
                }
                else
                {
                        return SIMPLEPIE_CONSTRUCT_TEXT;
                }
        }

        public static function is_isegment_nz_nc($string)
        {
                return (bool) preg_match('/^([A-Za-z0-9\-._~\x{A0}-\x{D7FF}\x{F900}-\x{FDCF}\x{FDF0}-\x{FFEF}\x{10000}-\x{1FFFD}\x{20000}-\x{2FFFD}\x{30000}-\x{3FFFD}\x{40000}-\x{4FFFD}\x{50000}-\x{5FFFD}\x{60000}-\x{6FFFD}\x{70000}-\x{7FFFD}\x{80000}-\x{8FFFD}\x{90000}-\x{9FFFD}\x{A0000}-\x{AFFFD}\x{B0000}-\x{BFFFD}\x{C0000}-\x{CFFFD}\x{D0000}-\x{DFFFD}\x{E1000}-\x{EFFFD}!$&\'()*+,;=@]|(%[0-9ABCDEF]{2}))+$/u', $string);
        }

        public static function space_seperated_tokens($string)
        {
                $space_characters = "\x20\x09\x0A\x0B\x0C\x0D";
                $string_length = strlen($string);

                $position = strspn($string, $space_characters);
                $tokens = array();

                while ($position < $string_length)
                {
                        $len = strcspn($string, $space_characters, $position);
                        $tokens[] = substr($string, $position, $len);
                        $position += $len;
                        $position += strspn($string, $space_characters, $position);
                }

                return $tokens;
        }

        public static function codepoint_to_utf8($codepoint)
        {
                $codepoint = (int) $codepoint;
                if ($codepoint < 0)
                {
                        return false;
                }
                else if ($codepoint <= 0x7f)
                {
                        return chr($codepoint);
                }
                else if ($codepoint <= 0x7ff)
                {
                        return chr(0xc0 | ($codepoint >> 6)) . chr(0x80 | ($codepoint & 0x3f));
                }
                else if ($codepoint <= 0xffff)
                {
                        return chr(0xe0 | ($codepoint >> 12)) . chr(0x80 | (($codepoint >> 6) & 0x3f)) . chr(0x80 | ($codepoint & 0x3f));
                }
                else if ($codepoint <= 0x10ffff)
                {
                        return chr(0xf0 | ($codepoint >> 18)) . chr(0x80 | (($codepoint >> 12) & 0x3f)) . chr(0x80 | (($codepoint >> 6) & 0x3f)) . chr(0x80 | ($codepoint & 0x3f));
                }
                else
                {
                        // U+FFFD REPLACEMENT CHARACTER
                        return "\xEF\xBF\xBD";
                }
        }

        public static function parse_str($str)
        {
                $return = array();
                $str = explode('&', $str);

                foreach ($str as $section)
                {
                        if (strpos($section, '=') !== false)
                        {
                                list($name, $value) = explode('=', $section, 2);
                                $return[urldecode($name)][] = urldecode($value);
                        }
                        else
                        {
                                $return[urldecode($section)][] = null;
                        }
                }

                return $return;
        }

        public static function xml_encoding($data, $registry)
        {
                // UTF-32 Big Endian BOM
                if (substr($data, 0, 4) === "\x00\x00\xFE\xFF")
                {
                        $encoding[] = 'UTF-32BE';
                }
                // UTF-32 Little Endian BOM
                elseif (substr($data, 0, 4) === "\xFF\xFE\x00\x00")
                {
                        $encoding[] = 'UTF-32LE';
                }
                // UTF-16 Big Endian BOM
                elseif (substr($data, 0, 2) === "\xFE\xFF")
                {
                        $encoding[] = 'UTF-16BE';
                }
                // UTF-16 Little Endian BOM
                elseif (substr($data, 0, 2) === "\xFF\xFE")
                {
                        $encoding[] = 'UTF-16LE';
                }
                // UTF-8 BOM
                elseif (substr($data, 0, 3) === "\xEF\xBB\xBF")
                {
                        $encoding[] = 'UTF-8';
                }
                // UTF-32 Big Endian Without BOM
                elseif (substr($data, 0, 20) === "\x00\x00\x00\x3C\x00\x00\x00\x3F\x00\x00\x00\x78\x00\x00\x00\x6D\x00\x00\x00\x6C")
                {
                        if ($pos = strpos($data, "\x00\x00\x00\x3F\x00\x00\x00\x3E"))
                        {
                                $parser = $registry->create('XML_Declaration_Parser', array(SimplePie_Misc::change_encoding(substr($data, 20, $pos - 20), 'UTF-32BE', 'UTF-8')));
                                if ($parser->parse())
                                {
                                        $encoding[] = $parser->encoding;
                                }
                        }
                        $encoding[] = 'UTF-32BE';
                }
                // UTF-32 Little Endian Without BOM
                elseif (substr($data, 0, 20) === "\x3C\x00\x00\x00\x3F\x00\x00\x00\x78\x00\x00\x00\x6D\x00\x00\x00\x6C\x00\x00\x00")
                {
                        if ($pos = strpos($data, "\x3F\x00\x00\x00\x3E\x00\x00\x00"))
                        {
                                $parser = $registry->create('XML_Declaration_Parser', array(SimplePie_Misc::change_encoding(substr($data, 20, $pos - 20), 'UTF-32LE', 'UTF-8')));
                                if ($parser->parse())
                                {
                                        $encoding[] = $parser->encoding;
                                }
                        }
                        $encoding[] = 'UTF-32LE';
                }
                // UTF-16 Big Endian Without BOM
                elseif (substr($data, 0, 10) === "\x00\x3C\x00\x3F\x00\x78\x00\x6D\x00\x6C")
                {
                        if ($pos = strpos($data, "\x00\x3F\x00\x3E"))
                        {
                                $parser = $registry->create('XML_Declaration_Parser', array(SimplePie_Misc::change_encoding(substr($data, 20, $pos - 10), 'UTF-16BE', 'UTF-8')));
                                if ($parser->parse())
                                {
                                        $encoding[] = $parser->encoding;
                                }
                        }
                        $encoding[] = 'UTF-16BE';
                }
                // UTF-16 Little Endian Without BOM
                elseif (substr($data, 0, 10) === "\x3C\x00\x3F\x00\x78\x00\x6D\x00\x6C\x00")
                {
                        if ($pos = strpos($data, "\x3F\x00\x3E\x00"))
                        {
                                $parser = $registry->create('XML_Declaration_Parser', array(SimplePie_Misc::change_encoding(substr($data, 20, $pos - 10), 'UTF-16LE', 'UTF-8')));
                                if ($parser->parse())
                                {
                                        $encoding[] = $parser->encoding;
                                }
                        }
                        $encoding[] = 'UTF-16LE';
                }
                // US-ASCII (or superset)
                elseif (substr($data, 0, 5) === "\x3C\x3F\x78\x6D\x6C")
                {
                        if ($pos = strpos($data, "\x3F\x3E"))
                        {
                                $parser = $registry->create('XML_Declaration_Parser', array(substr($data, 5, $pos - 5)));
                                if ($parser->parse())
                                {
                                        $encoding[] = $parser->encoding;
                                }
                        }
                        $encoding[] = 'UTF-8';
                }
                // Fallback to UTF-8
                else
                {
                        $encoding[] = 'UTF-8';
                }
                return $encoding;
        }

        public static function output_javascript()
        {
                if (function_exists('ob_gzhandler'))
                {
                        ob_start('ob_gzhandler');
                }
                header('Content-type: text/javascript; charset: UTF-8');
                header('Cache-Control: must-revalidate');
                header('Expires: ' . gmdate('D, d M Y H:i:s', time() + 604800) . ' GMT'); // 7 days
                ?>
function embed_quicktime(type, bgcolor, width, height, link, placeholder, loop) {
        if (placeholder != '') {
                document.writeln('<embed type="'+type+'" style="cursor:hand; cursor:pointer;" href="'+link+'" src="'+placeholder+'" width="'+width+'" height="'+height+'" autoplay="false" target="myself" controller="false" loop="'+loop+'" scale="aspect" bgcolor="'+bgcolor+'" pluginspage="http://www.apple.com/quicktime/download/"></embed>');
        }
        else {
                document.writeln('<embed type="'+type+'" style="cursor:hand; cursor:pointer;" src="'+link+'" width="'+width+'" height="'+height+'" autoplay="false" target="myself" controller="true" loop="'+loop+'" scale="aspect" bgcolor="'+bgcolor+'" pluginspage="http://www.apple.com/quicktime/download/"></embed>');
        }
}

function embed_flash(bgcolor, width, height, link, loop, type) {
        document.writeln('<embed src="'+link+'" pluginspage="http://www.macromedia.com/go/getflashplayer" type="'+type+'" quality="high" width="'+width+'" height="'+height+'" bgcolor="'+bgcolor+'" loop="'+loop+'"></embed>');
}

function embed_flv(width, height, link, placeholder, loop, player) {
        document.writeln('<embed src="'+player+'" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" quality="high" width="'+width+'" height="'+height+'" wmode="transparent" flashvars="file='+link+'&autostart=false&repeat='+loop+'&showdigits=true&showfsbutton=false"></embed>');
}

function embed_wmedia(width, height, link) {
        document.writeln('<embed type="application/x-mplayer2" src="'+link+'" autosize="1" width="'+width+'" height="'+height+'" showcontrols="1" showstatusbar="0" showdisplay="0" autostart="0"></embed>');
}
                <?php
        }

        public static function get_build()
        {
                $root = dirname(dirname(__FILE__));
                if (file_exists($root . '/.git/index'))
                {
                        return filemtime($root . '/.git/index');
                }
                elseif (file_exists($root . '/SimplePie'))
                {
                        $time = 0;
                        foreach (glob($root . '/SimplePie/*.php') as $file)
                        {
                                if (($mtime = filemtime($file)) > $time)
                                {
                                        $time = $mtime;
                                }
                        }
                        return $time;
                }
                elseif (file_exists(dirname(__FILE__) . '/Core.php'))
                {
                        return filemtime(dirname(__FILE__) . '/Core.php');
                }
                else
                {
                        return filemtime(__FILE__);
                }
        }

        public static function debug(&$sp)
        {
                $info = 'SimplePie ' . SIMPLEPIE_VERSION . ' Build ' . SIMPLEPIE_BUILD . "\n";
                $info .= 'PHP ' . PHP_VERSION . "\n";
                if ($sp->error() !== null)
                {
                        $info .= 'Error occurred: ' . $sp->error() . "\n";
                }
                else
                {
                        $info .= "No error found.\n";
                }
                $info .= "Extensions:\n";
                $extensions = array('pcre', 'curl', 'zlib', 'mbstring', 'iconv', 'xmlreader', 'xml');
                foreach ($extensions as $ext)
                {
                        if (extension_loaded($ext))
                        {
                                $info .= "    $ext loaded\n";
                                switch ($ext)
                                {
                                        case 'pcre':
                                                $info .= '      Version ' . PCRE_VERSION . "\n";
                                                break;
                                        case 'curl':
                                                $version = curl_version();
                                                $info .= '      Version ' . $version['version'] . "\n";
                                                break;
                                        case 'mbstring':
                                                $info .= '      Overloading: ' . mb_get_info('func_overload') . "\n";
                                                break;
                                        case 'iconv':
                                                $info .= '      Version ' . ICONV_VERSION . "\n";
                                                break;
                                        case 'xml':
                                                $info .= '      Version ' . LIBXML_DOTTED_VERSION . "\n";
                                                break;
                                }
                        }
                        else
                        {
                                $info .= "    $ext not loaded\n";
                        }
                }
                return $info;
        }

        public static function silence_errors($num, $str)
        {
                // No-op
        }
}