Blame view

libraries/vendor/joomla/string/src/phputf8/strspn.php 863 Bytes
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
<?php
/**
* @package utf8
*/

//---------------------------------------------------------------
/**
* UTF-8 aware alternative to strspn
* Find length of initial segment matching mask
* Note: requires utf8_strlen and utf8_substr (if start, length are used)
* @param string
* @return int
* @see http://www.php.net/strspn
* @package utf8
*/
function utf8_strspn($str, $mask, $start = NULL, $length = NULL) {

    $mask = preg_replace('!([\\\\\\-\\]\\[/^])!','\\\${1}',$mask);

	// Fix for $start but no $length argument.
    if ($start !== null && $length === null) {
    	$length = utf8_strlen($str);
    }

    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;

}