<?php

namespace _JchOptimizeVendor\V91;

/**
* @package utf8
*/
//---------------------------------------------------------------
/**
* 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
*/
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;
}
