CakeRequest::_parseAcceptWithQualifier PHP Method

    protected static function _parseAcceptWithQualifier($header)
    {
        $accept = array();
        $header = explode(',', $header);
        foreach (array_filter($header) as $value) {
            $prefValue = '1.0';
            $value = trim($value);
            $semiPos = strpos($value, ';');
            if ($semiPos !== false) {
                $params = explode(';', $value);
                $value = trim($params[0]);
                foreach ($params as $param) {
                    $qPos = strpos($param, 'q=');
                    if ($qPos !== false) {
                        $prefValue = substr($param, $qPos + 2);
                    }
                }
            }
            if (!isset($accept[$prefValue])) {
                $accept[$prefValue] = array();
            }
            if ($prefValue) {
                $accept[$prefValue][] = $value;
            }
        }
        krsort($accept);
        return $accept;
    }