PHP function implementing partial function application

PHP-partial-application.php

<?php
function Pa() // Partially Apply
{
  $origArgs = func_get_args();
  return function() use ( $origArgs )
    {
      $allArgs = array_merge( $origArgs, func_get_args() );
      return call_user_func_array( 'call_user_func', $allArgs );
    };
}
?>