curry in php 5.3

Here is curry in php 5.3

 function curry(){
   $args = func_get_args();
   $fn = array_shift($args);
   return function() use(&$fn, &$args) {
       $nargs = func_get_args();
       foreach($nargs as $narg) $args[] = $narg;
       return call_user_func_array($fn, $args);
   };
 }

 $add20 = curry(function($a, $b){return $a + $b;}, 20);
 echo $add20(5); #25