Calling PHP functions with named arguments

The great thing about Python is that it's able to pass arguments to a function using a name, which looks like this:

My_foo_function (param_name= "value", another_param_name= "another value")

Today I want to do the same thing in PHP 5.4 (easy to migrate to PHP 5.3), I wrote a call_user_func_named function, similar to the PHP built-in Call_user_func_array function, the code is as follows:

<?php

$x = function ($bar, $foo = "9") {
Echo $foo, $bar, "\ n";
};

Class Missingargumentexception extends Exception {
}

Function Call_user_func_named_array ($method, $arr) {
  $ref = new Reflectionfunction ($method);
  $ params = [];
  foreach ($ref->getparameters () as $p) {
    if ($p->isoptional ()) {
       if (isset ($arr [$p->name]) {
        $params [] = $arr [$ p->name];
     }else{
        $params [] = $p-> Getdefaultvalue ();
     }
   }else if (isset ($arr [$p->name])) {
      $params [] = $arr [$p- >name];
   }else{
      throw new Missingargumentexception ("Missing Parameter $p->name ");
   }
 }
  return $ref->invokeargs ($params);
}

Call_user_func_named_array ($x, [' foo ' => ' hello ', ' bar ' => ' world ']); Pass All Parameterss
Call_user_func_named_array ($x, [' Bar ' => ' world ']); Only pass one parameter
Call_user_func_named_array ($x, []); Would throw exception

Update: Thanks to some enthusiastic contributors for some improvements:

<?php

$x = function ($bar, $foo = "9") {
Echo $foo, $bar, "\ n";
};

Class Missingargumentexception extends Exception {
}

Function Call_user_func_named_array ($method, $arr) {
  $ref = new Reflectionfunction ($method);
  $ params = [];
  foreach ($ref->getparameters () as $p) {
    if (! $p->isoptional () and!isset ($arr [$p ->name]) throw new Missingargumentexception ("Missing parameter $p->name");
    if (!isset ($arr [$p->name]) $params [] = $p->getdefaultvalue ();
    Else $params [] = $arr [$p->name];
 }
  return $ref->invokeargs ($params);
}
Function Make_named_array_function ($func) {
  return function ($arr) use ($func) {
  &nb Sp Return Call_user_func_named_array ($func, $arr);
 };
}

Call_user_func_named_array ($x, [' foo ' => ' hello ', ' bar ' => ' world ']); Pass All Parameterss
Call_user_func_named_array ($x, [' Bar ' => ' world ']); Only pass one parameter
Call_user_func_named_array ($x, []); Would throw exception

$y = Make_named_array_function ($x);
$y ([' foo ' => ' hello ', ' bar ' => ' world ')]; Pass All Parameterss
$y ([' Bar ' => ' world ']); Only pass one parameter
$y ([]); Would throw exception