请问为什么出错

  function daddslashes($str){

        return (!get_magic_quotes_gpc())?addslashes($str):$str;

    }

Description Resource Path Location Type

Call to undefined function 'addslashes' function.php /MVC/mvc line 31 PHP Semantic Problem

Description Resource Path Location Type

Call to undefined function 'get_magic_quotes_gpc' function.php /MVC/mvc line 31 PHP Semantic Problem