TeamSpeak3/Node/Server.php
protected static function sortFileList(array $a, array $b)
    {
        if (!array_key_exists("src", $a) || !array_key_exists("src", $b) || !array_key_exists(
                "type",
                $a
            ) || !array_key_exists("type", $b)
        ) {
            return 0;

            throw new Ts3Exception("invalid parameter", 0x602);
        }

        if ($a["type"] != $b["type"]) {
            return ($a["type"] < $b["type"]) ? -1 : 1;
        }

        return strcmp(strtolower($a["src"]), strtolower($b["src"]));
    }
protected static function sortFileList(array $a, array $b)
    {
        if (!array_key_exists("src", $a) || !array_key_exists("src", $b) || !array_key_exists(
                "type",
                $a
            ) || !array_key_exists("type", $b)
        ) {
            return 0;

            throw new Ts3Exception("invalid parameter", 0x602);
        }

        if ($a["type"] != $b["type"]) {
            return ($a["type"] < $b["type"]) ? -1 : 1;
        }

        return strcmp(strtolower($a["src"]), strtolower($b["src"]));
    }
Internal callback funtion for sorting of file list items.

@param  array $a
@param  array $b
@throws \Teamspeak3\Ts3Exception
@return integer