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<?php
/**
* @version $Id: strcspn.php 10381 2008-06-01 03:35:53Z pasamio $
* @package utf8
* @subpackage strings
*/
//---------------------------------------------------------------
/**
* UTF-8 aware alternative to strcspn
* Find length of initial segment not matching mask
* Note: requires utf8_strlen and utf8_substr (if start, length are used)
* @param string
* @return int
* @see http://www.php.net/strcspn
* @see utf8_strlen
* @package utf8
* @subpackage strings
*/
function utf8_strcspn($str, $mask, $start = NULL, $length = NULL) {
if ( empty($mask) || strlen($mask) == 0 ) {
return NULL;
}
$mask = preg_replace('!([\\\\\\-\\]\\[/^])!','\\\${1}',$mask);
if ( $start !== NULL || $length !== NULL ) {
$str = utf8_substr($str, $start, $length);
}
preg_match('/^[^'.$mask.']+/u',$str, $matches);
if ( isset($matches[0]) ) {
return utf8_strlen($matches[0]);
}
return 0;
}