File vendor/joomla/string/src/phputf8/strspn.php | Joomla! Framework TM

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 1 <?php
 2 /**
 3 * @package utf8
 4 */
 5 
 6 //---------------------------------------------------------------
 7 /**
 8 * UTF-8 aware alternative to strspn
 9 * Find length of initial segment matching mask
10 * Note: requires utf8_strlen and utf8_substr (if start, length are used)
11 * @param string
12 * @return int
13 * @see http://www.php.net/strspn
14 * @package utf8
15 */
16 function utf8_strspn($str, $mask, $start = NULL, $length = NULL) {
17 
18     $mask = preg_replace('!([\\\\\\-\\]\\[/^])!','\\\${1}',$mask);
19 
20     // Fix for $start but no $length argument.
21     if ($start !== null && $length === null) {
22         $length = utf8_strlen($str);
23     }
24 
25     if ( $start !== NULL || $length !== NULL ) {
26         $str = utf8_substr($str, $start, $length);
27     }
28 
29     preg_match('/^['.$mask.']+/u',$str, $matches);
30 
31     if ( isset($matches[0]) ) {
32         return utf8_strlen($matches[0]);
33     }
34 
35     return 0;
36 
37 }
38 
39