/MantisBT/library/utf8/exp/regexunicode.php
PHP | 37 lines | 29 code | 2 blank | 6 comment | 11 complexity | a33979c1a26120bc0293368c29efc9e3 MD5 | raw file
Possible License(s): AGPL-1.0, GPL-2.0, LGPL-2.1, GPL-3.0, LGPL-2.0, AGPL-3.0
- <?php
- /**
- * This was an experiment to see how a PCRE based UTF-8 to unicode
- * code point converter would perform, vs. a character by character
- * converted (as in '../utf8_unicode.php'). Basically this is very
- * by comparion but perhaps interesting code anyway
- */
- $UTF8_MATCH =
- '([\x09\x0A\x0D\x20-\x7E])'. # ASCII (excluding control chars)
- '|([\xC2-\xDF][\x80-\xBF]'. # non-overlong 2-byte
- '|\xE0[\xA0-\xBF][\x80-\xBF])'. # excluding overlongs
- '|([\xE1-\xEC\xEE\xEF][\x80-\xBF]{2}'. # straight 3-byte
- '|\xED[\x80-\x9F][\x80-\xBF]'. # excluding surrogates
- '|\xF0[\x90-\xBF][\x80-\xBF]{2}'. # planes 1-3
- '|[\xF1-\xF3][\x80-\xBF]{3}'. # planes 4-15
- '|\xF4[\x80-\x8F][\x80-\xBF]{2})'; # plane 16
- '|(.{1})'; # catch bad bytes
- function toCodePoint($matches) {
- global $points;
- if ( $matches[1] != '' ) {
- $points[]= ord($matches[1]);
- } else if ( $matches[2] != '' ) {
- $points[]= ( ( ord($matches[2][0]) % 32 ) * 64 ) + ( ord($matches[2][1]) % 64 );
- } else if ( $matches[3] != '' ) {
- $points[]= ( ( ord($matches[3][0]) % 16 ) * 4096 ) + ( ( ord($matches[3][1]) % 64 ) * 64 ) + ( ord($matches[3][2]) % 64 );
- } else if ( $matches[4] != '' ) {
- trigger_error('Invalid byte in UTF-8',E_USER_WARNING);
- return '';
- }
- return $matches[0];
- }
- $str = file_get_contents('../tests/data/utf8.html');
- $points = array();
- preg_replace_callback('/'.$UTF8_MATCH.'/S','toCodePoint',$str);
- print_r($points);