<?php/*** PCRE Regular expressions for UTF-8. Note this file is not actually used by* the rest of the library but these regular expressions can be useful to have* available.* @version $Id: patterns.php 10381 2008-06-01 03:35:53Z pasamio $* @see http://www.w3.org/International/questions/qa-forms-utf-8* @package utf8* @subpackage patterns*///--------------------------------------------------------------------/*** PCRE Pattern to check a UTF-8 string is valid* Comes from W3 FAQ: Multilingual Forms* Note: modified to include full ASCII range including control chars* @see http://www.w3.org/International/questions/qa-forms-utf-8* @package utf8* @subpackage patterns*/$UTF8_VALID = '^('.    '[\x00-\x7F]'.                          # ASCII (including 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    ')*$';//--------------------------------------------------------------------/*** PCRE Pattern to match single UTF-8 characters* Comes from W3 FAQ: Multilingual Forms* Note: modified to include full ASCII range including control chars* @see http://www.w3.org/International/questions/qa-forms-utf-8* @package utf8* @subpackage patterns*/$UTF8_MATCH =    '([\x00-\x7F])'.                          # ASCII (including 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//--------------------------------------------------------------------/*** PCRE Pattern to locate bad bytes in a UTF-8 string* Comes from W3 FAQ: Multilingual Forms* Note: modified to include full ASCII range including control chars* @see http://www.w3.org/International/questions/qa-forms-utf-8* @package utf8* @subpackage patterns*/$UTF8_BAD =    '([\x00-\x7F]'.                          # ASCII (including 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}))';                              # invalid byte