<?php

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/*

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* This file is part of the Symfony package.

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*

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* (c) Fabien Potencier <fabien@symfony.com>

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*

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* For the full copyright and license information, please view the LICENSE

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* file that was distributed with this source code.

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*/

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namespace Symfony\Polyfill\Mbstring;

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/**

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* Partial mbstring implementation in PHP, iconv based, UTF-8 centric.

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*

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* Implemented:

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* - mb_chr - Returns a specific character from its Unicode code point

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* - mb_convert_encoding - Convert character encoding

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* - mb_convert_variables - Convert character code in variable(s)

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* - mb_decode_mimeheader - Decode string in MIME header field

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* - mb_encode_mimeheader - Encode string for MIME header XXX NATIVE IMPLEMENTATION IS REALLY BUGGED

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* - mb_decode_numericentity - Decode HTML numeric string reference to character

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* - mb_encode_numericentity - Encode character to HTML numeric string reference

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* - mb_convert_case - Perform case folding on a string

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* - mb_detect_encoding - Detect character encoding

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* - mb_get_info - Get internal settings of mbstring

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* - mb_http_input - Detect HTTP input character encoding

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* - mb_http_output - Set/Get HTTP output character encoding

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* - mb_internal_encoding - Set/Get internal character encoding

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* - mb_list_encodings - Returns an array of all supported encodings

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* - mb_ord - Returns the Unicode code point of a character

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* - mb_output_handler - Callback function converts character encoding in output buffer

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* - mb_scrub - Replaces ill-formed byte sequences with substitute characters

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* - mb_strlen - Get string length

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* - mb_strpos - Find position of first occurrence of string in a string

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* - mb_strrpos - Find position of last occurrence of a string in a string

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* - mb_str_split - Convert a string to an array

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* - mb_strtolower - Make a string lowercase

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* - mb_strtoupper - Make a string uppercase

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* - mb_substitute_character - Set/Get substitution character

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* - mb_substr - Get part of string

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* - mb_stripos - Finds position of first occurrence of a string within another, case insensitive

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* - mb_stristr - Finds first occurrence of a string within another, case insensitive

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* - mb_strrchr - Finds the last occurrence of a character in a string within another

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* - mb_strrichr - Finds the last occurrence of a character in a string within another, case insensitive

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* - mb_strripos - Finds position of last occurrence of a string within another, case insensitive

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* - mb_strstr - Finds first occurrence of a string within another

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* - mb_strwidth - Return width of string

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* - mb_substr_count - Count the number of substring occurrences

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*

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* Not implemented:

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* - mb_convert_kana - Convert "kana" one from another ("zen-kaku", "han-kaku" and more)

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* - mb_ereg_* - Regular expression with multibyte support

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* - mb_parse_str - Parse GET/POST/COOKIE data and set global variable

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* - mb_preferred_mime_name - Get MIME charset string

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* - mb_regex_encoding - Returns current encoding for multibyte regex as string

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* - mb_regex_set_options - Set/Get the default options for mbregex functions

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* - mb_send_mail - Send encoded mail

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* - mb_split - Split multibyte string using regular expression

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* - mb_strcut - Get part of string

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* - mb_strimwidth - Get truncated string with specified width

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*

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* @author Nicolas Grekas <p@tchwork.com>

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*

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* @internal

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*/

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final class Mbstring

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{

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const MB_CASE_FOLD = PHP_INT_MAX;

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private static $encodingList = array('ASCII', 'UTF-8');

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private static $language = 'neutral';

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private static $internalEncoding = 'UTF-8';

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private static $caseFold = array(

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array('µ', 'ſ', "\xCD\x85", 'ς', "\xCF\x90", "\xCF\x91", "\xCF\x95", "\xCF\x96", "\xCF\xB0", "\xCF\xB1", "\xCF\xB5", "\xE1\xBA\x9B", "\xE1\xBE\xBE"),

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array('μ', 's', 'ι', 'σ', 'β', 'θ', 'φ', 'π', 'κ', 'ρ', 'ε', "\xE1\xB9\xA1", 'ι'),

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);

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public static function mb_convert_encoding($s, $toEncoding, $fromEncoding = null)

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{

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if (\is_array($fromEncoding) || false !== strpos($fromEncoding, ',')) {

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$fromEncoding = self::mb_detect_encoding($s, $fromEncoding);

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} else {

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$fromEncoding = self::getEncoding($fromEncoding);

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}

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$toEncoding = self::getEncoding($toEncoding);

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if ('BASE64' === $fromEncoding) {

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$s = base64_decode($s);

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$fromEncoding = $toEncoding;

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}

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if ('BASE64' === $toEncoding) {

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return base64_encode($s);

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}

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if ('HTML-ENTITIES' === $toEncoding || 'HTML' === $toEncoding) {

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if ('HTML-ENTITIES' === $fromEncoding || 'HTML' === $fromEncoding) {

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$fromEncoding = 'Windows-1252';

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}

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if ('UTF-8' !== $fromEncoding) {

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$s = iconv($fromEncoding, 'UTF-8//IGNORE', $s);

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}

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return preg_replace_callback('/[\x80-\xFF]+/', array(__CLASS__, 'html_encoding_callback'), $s);

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}

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if ('HTML-ENTITIES' === $fromEncoding) {

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$s = html_entity_decode($s, ENT_COMPAT, 'UTF-8');

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$fromEncoding = 'UTF-8';

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}

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return iconv($fromEncoding, $toEncoding.'//IGNORE', $s);

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}

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public static function mb_convert_variables($toEncoding, $fromEncoding, &$a = null, &$b = null, &$c = null, &$d = null, &$e = null, &$f = null)

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{

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$vars = array(&$a, &$b, &$c, &$d, &$e, &$f);

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$ok = true;

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array_walk_recursive($vars, function (&$v) use (&$ok, $toEncoding, $fromEncoding) {

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if (false === $v = Mbstring::mb_convert_encoding($v, $toEncoding, $fromEncoding)) {

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$ok = false;

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}

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});

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return $ok ? $fromEncoding : false;

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}

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public static function mb_decode_mimeheader($s)

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{

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return iconv_mime_decode($s, 2, self::$internalEncoding);

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}

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public static function mb_encode_mimeheader($s, $charset = null, $transferEncoding = null, $linefeed = null, $indent = null)

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{

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trigger_error('mb_encode_mimeheader() is bugged. Please use iconv_mime_encode() instead', E_USER_WARNING);

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}

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public static function mb_decode_numericentity($s, $convmap, $encoding = null)

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{

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if (null !== $s && !\is_scalar($s) && !(\is_object($s) && \method_exists($s, '__toString'))) {

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trigger_error('mb_decode_numericentity() expects parameter 1 to be string, '.\gettype($s).' given', E_USER_WARNING);

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return null;

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}

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if (!\is_array($convmap) || !$convmap) {

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return false;

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}

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if (null !== $encoding && !\is_scalar($encoding)) {

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trigger_error('mb_decode_numericentity() expects parameter 3 to be string, '.\gettype($s).' given', E_USER_WARNING);

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return ''; // Instead of null (cf. mb_encode_numericentity).

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}

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$s = (string) $s;

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if ('' === $s) {

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return '';

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}

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$encoding = self::getEncoding($encoding);

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if ('UTF-8' === $encoding) {

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$encoding = null;

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if (!preg_match('//u', $s)) {

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$s = @iconv('UTF-8', 'UTF-8//IGNORE', $s);

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}

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} else {

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$s = iconv($encoding, 'UTF-8//IGNORE', $s);

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}

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$cnt = floor(\count($convmap) / 4) * 4;

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for ($i = 0; $i < $cnt; $i += 4) {

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// collector_decode_htmlnumericentity ignores $convmap[$i + 3]

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$convmap[$i] += $convmap[$i + 2];

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$convmap[$i + 1] += $convmap[$i + 2];

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}

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$s = preg_replace_callback('/&#(?:0*([0-9]+)|x0*([0-9a-fA-F]+))(?!&);?/', function (array $m) use ($cnt, $convmap) {

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$c = isset($m[2]) ? (int) hexdec($m[2]) : $m[1];

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for ($i = 0; $i < $cnt; $i += 4) {

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if ($c >= $convmap[$i] && $c <= $convmap[$i + 1]) {

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return Mbstring::mb_chr($c - $convmap[$i + 2]);

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}

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}

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return $m[0];

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}, $s);

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if (null === $encoding) {

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return $s;

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}

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return iconv('UTF-8', $encoding.'//IGNORE', $s);

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}

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public static function mb_encode_numericentity($s, $convmap, $encoding = null, $is_hex = false)

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{

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if (null !== $s && !\is_scalar($s) && !(\is_object($s) && \method_exists($s, '__toString'))) {

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trigger_error('mb_encode_numericentity() expects parameter 1 to be string, '.\gettype($s).' given', E_USER_WARNING);

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return null;

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}

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if (!\is_array($convmap) || !$convmap) {

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return false;

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}

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if (null !== $encoding && !\is_scalar($encoding)) {

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trigger_error('mb_encode_numericentity() expects parameter 3 to be string, '.\gettype($s).' given', E_USER_WARNING);

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return null; // Instead of '' (cf. mb_decode_numericentity).

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}

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if (null !== $is_hex && !\is_scalar($is_hex)) {

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trigger_error('mb_encode_numericentity() expects parameter 4 to be boolean, '.\gettype($s).' given', E_USER_WARNING);

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return null;

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}

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$s = (string) $s;

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if ('' === $s) {

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return '';

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}

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$encoding = self::getEncoding($encoding);

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if ('UTF-8' === $encoding) {

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$encoding = null;

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if (!preg_match('//u', $s)) {

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$s = @iconv('UTF-8', 'UTF-8//IGNORE', $s);

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}

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} else {

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$s = iconv($encoding, 'UTF-8//IGNORE', $s);

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}

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static $ulenMask = array("\xC0" => 2, "\xD0" => 2, "\xE0" => 3, "\xF0" => 4);

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$cnt = floor(\count($convmap) / 4) * 4;

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$i = 0;

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$len = \strlen($s);

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$result = '';

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while ($i < $len) {

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$ulen = $s[$i] < "\x80" ? 1 : $ulenMask[$s[$i] & "\xF0"];

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$uchr = substr($s, $i, $ulen);

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$i += $ulen;

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$c = self::mb_ord($uchr);

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for ($j = 0; $j < $cnt; $j += 4) {

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if ($c >= $convmap[$j] && $c <= $convmap[$j + 1]) {

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$cOffset = ($c + $convmap[$j + 2]) & $convmap[$j + 3];

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$result .= $is_hex ? sprintf('&#x%X;', $cOffset) : '&#'.$cOffset.';';

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continue 2;

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}

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}

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$result .= $uchr;

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}

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if (null === $encoding) {

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return $result;

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}

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return iconv('UTF-8', $encoding.'//IGNORE', $result);

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}

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public static function mb_convert_case($s, $mode, $encoding = null)

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{

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$s = (string) $s;

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if ('' === $s) {

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return '';

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}

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$encoding = self::getEncoding($encoding);

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if ('UTF-8' === $encoding) {

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$encoding = null;

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if (!preg_match('//u', $s)) {

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$s = @iconv('UTF-8', 'UTF-8//IGNORE', $s);

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}

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} else {

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$s = iconv($encoding, 'UTF-8//IGNORE', $s);

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}

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if (MB_CASE_TITLE == $mode) {

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static $titleRegexp = null;

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if (null === $titleRegexp) {

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$titleRegexp = self::getData('titleCaseRegexp');

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}

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$s = preg_replace_callback($titleRegexp, array(__CLASS__, 'title_case'), $s);

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} else {

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if (MB_CASE_UPPER == $mode) {

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static $upper = null;

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if (null === $upper) {

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$upper = self::getData('upperCase');

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}

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$map = $upper;

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} else {

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if (self::MB_CASE_FOLD === $mode) {

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$s = str_replace(self::$caseFold[0], self::$caseFold[1], $s);

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}

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static $lower = null;

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if (null === $lower) {

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$lower = self::getData('lowerCase');

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}

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$map = $lower;

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}

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static $ulenMask = array("\xC0" => 2, "\xD0" => 2, "\xE0" => 3, "\xF0" => 4);

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$i = 0;

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$len = \strlen($s);

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while ($i < $len) {

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$ulen = $s[$i] < "\x80" ? 1 : $ulenMask[$s[$i] & "\xF0"];

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$uchr = substr($s, $i, $ulen);

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$i += $ulen;

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if (isset($map[$uchr])) {

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$uchr = $map[$uchr];

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$nlen = \strlen($uchr);

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if ($nlen == $ulen) {

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$nlen = $i;

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do {

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$s[--$nlen] = $uchr[--$ulen];

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} while ($ulen);

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} else {

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$s = substr_replace($s, $uchr, $i - $ulen, $ulen);

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$len += $nlen - $ulen;

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$i += $nlen - $ulen;

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}

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}

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}

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}

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if (null === $encoding) {

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return $s;

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}

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return iconv('UTF-8', $encoding.'//IGNORE', $s);

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}

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public static function mb_internal_encoding($encoding = null)

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{

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if (null === $encoding) {

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return self::$internalEncoding;

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}

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$encoding = self::getEncoding($encoding);

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if ('UTF-8' === $encoding || false !== @iconv($encoding, $encoding, ' ')) {

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self::$internalEncoding = $encoding;

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return true;

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}

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return false;

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}

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public static function mb_language($lang = null)

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{

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if (null === $lang) {

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return self::$language;

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}

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switch ($lang = strtolower($lang)) {

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case 'uni':

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case 'neutral':

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self::$language = $lang;

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return true;

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}

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return false;

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}

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public static function mb_list_encodings()

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{

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return array('UTF-8');

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}

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public static function mb_encoding_aliases($encoding)

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{

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switch (strtoupper($encoding)) {

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case 'UTF8':

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case 'UTF-8':

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return array('utf8');

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}

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return false;

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}

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public static function mb_check_encoding($var = null, $encoding = null)

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{

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if (null === $encoding) {

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if (null === $var) {

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return false;

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}

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$encoding = self::$internalEncoding;

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}

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return self::mb_detect_encoding($var, array($encoding)) || false !== @iconv($encoding, $encoding, $var);

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}

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public static function mb_detect_encoding($str, $encodingList = null, $strict = false)

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{

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if (null === $encodingList) {

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$encodingList = self::$encodingList;

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} else {

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if (!\is_array($encodingList)) {

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$encodingList = array_map('trim', explode(',', $encodingList));

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}

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$encodingList = array_map('strtoupper', $encodingList);

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}

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foreach ($encodingList as $enc) {

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switch ($enc) {

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case 'ASCII':

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if (!preg_match('/[\x80-\xFF]/', $str)) {

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return $enc;

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}

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break;

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case 'UTF8':

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case 'UTF-8':

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if (preg_match('//u', $str)) {

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return 'UTF-8';

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}

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break;

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default:

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if (0 === strncmp($enc, 'ISO-8859-', 9)) {

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return $enc;

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}

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}

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}

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return false;

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}

[445] Fix | Delete

[446] Fix | Delete

public static function mb_detect_order($encodingList = null)

[447] Fix | Delete

{

[448] Fix | Delete

if (null === $encodingList) {

[449] Fix | Delete

return self::$encodingList;

[450] Fix | Delete

}

[451] Fix | Delete

[452] Fix | Delete

if (!\is_array($encodingList)) {

[453] Fix | Delete

$encodingList = array_map('trim', explode(',', $encodingList));

[454] Fix | Delete

}

[455] Fix | Delete

$encodingList = array_map('strtoupper', $encodingList);

[456] Fix | Delete

[457] Fix | Delete

foreach ($encodingList as $enc) {

[458] Fix | Delete

switch ($enc) {

[459] Fix | Delete

default:

[460] Fix | Delete

if (strncmp($enc, 'ISO-8859-', 9)) {

[461] Fix | Delete

return false;

[462] Fix | Delete

}

[463] Fix | Delete

// no break

[464] Fix | Delete

case 'ASCII':

[465] Fix | Delete

case 'UTF8':

[466] Fix | Delete

case 'UTF-8':

[467] Fix | Delete

}

[468] Fix | Delete

}

[469] Fix | Delete

[470] Fix | Delete

self::$encodingList = $encodingList;

[471] Fix | Delete

[472] Fix | Delete

return true;

[473] Fix | Delete

}

[474] Fix | Delete

[475] Fix | Delete

public static function mb_strlen($s, $encoding = null)

[476] Fix | Delete

{

[477] Fix | Delete

$encoding = self::getEncoding($encoding);

[478] Fix | Delete

if ('CP850' === $encoding || 'ASCII' === $encoding) {

[479] Fix | Delete

return \strlen($s);

[480] Fix | Delete

}

[481] Fix | Delete

[482] Fix | Delete

return @iconv_strlen($s, $encoding);

[483] Fix | Delete

}

[484] Fix | Delete

[485] Fix | Delete

public static function mb_strpos($haystack, $needle, $offset = 0, $encoding = null)

[486] Fix | Delete

{

[487] Fix | Delete

$encoding = self::getEncoding($encoding);

[488] Fix | Delete

if ('CP850' === $encoding || 'ASCII' === $encoding) {

[489] Fix | Delete

return strpos($haystack, $needle, $offset);

[490] Fix | Delete

}

[491] Fix | Delete

[492] Fix | Delete

$needle = (string) $needle;

[493] Fix | Delete

if ('' === $needle) {

[494] Fix | Delete

trigger_error(__METHOD__.': Empty delimiter', E_USER_WARNING);

[495] Fix | Delete

[496] Fix | Delete

return false;

[497] Fix | Delete

}

[498] Fix | Delete

[499] Fix | Delete