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[scuttle] / includes / utf8 / strcspn.php
1 <?php
2 /**
3 * @version $Id: strcspn.php,v 1.1 2006/02/25 13:50:17 harryf Exp $
4 * @package utf8
5 * @subpackage strings
6 */
7
8 //---------------------------------------------------------------
9 /**
10 * UTF-8 aware alternative to strcspn
11 * Find length of initial segment not matching mask
12 * Note: requires utf8_strlen and utf8_substr (if start, length are used)
13 * @param string
14 * @return int
15 * @see http://www.php.net/strcspn
16 * @see utf8_strlen
17 * @package utf8
18 * @subpackage strings
19 */
20 function utf8_strcspn($str, $mask, $start = NULL, $length = NULL) {
21     
22     if ( empty($mask) || strlen($mask) == 0 ) {
23         return NULL;
24     }
25     
26     $mask = preg_replace('!([\\\\\\-\\]\\[/^])!','\\\${1}',$mask);
27     
28     if ( $start !== NULL || $length !== NULL ) {
29         $str = utf8_substr($str, $start, $length);
30     }
31         
32     preg_match('/^[^'.$mask.']+/u',$str, $matches);
33     
34     if ( isset($matches[0]) ) {
35         return utf8_strlen($matches[0]);
36     }
37     
38     return 0;
39     
40 }
41

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