CALL_USER_FUNC_ARRAY(3) 						 1						   CALL_USER_FUNC_ARRAY(3)

call_user_func_array - Call a callback with an array of parameters

SYNOPSIS

       mixed call_user_func_array (callable  $callback, array  $param_arr)

DESCRIPTION

	Calls the $callback given by the first parameter with the parameters in $param_arr.

PARAMETERS

	      o $callback
		- The callable to be called.

	      o $param_arr
		- The parameters to be passed to the callback, as an indexed array.

RETURN VALUES

	Returns the return value of the callback, or FALSE on error.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.3.0	|						    |
       |	|						    |
       |	|  The	interpretation	of object oriented keywords |
       |	| like parent and  self  has  changed.	Previously, |
       |	| calling  them using the double colon syntax would |
       |	| emit an E_STRICT warning because they were inter- |
       |	| preted as static.				    |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

       Example #1

	      call_user_func_array(3) example

	      <?php
	      function foobar($arg, $arg2) {
		  echo __FUNCTION__, " got $arg and $arg2
";
	      }
	      class foo {
		  function bar($arg, $arg2) {
		      echo __METHOD__, " got $arg and $arg2
";
		  }
	      }

	      // Call the foobar() function with 2 arguments
	      call_user_func_array("foobar", array("one", "two"));

	      // Call the $foo->bar() method with 2 arguments
	      $foo = new foo;
	      call_user_func_array(array($foo, "bar"), array("three", "four"));
	      ?>

	      The above example will output something similar to:

	      foobar got one and two
	      foo::bar got three and four

       Example #2

	      call_user_func_array(3) using namespace name

	      <?php

	      namespace Foobar;

	      class Foo {
		  static public function test($name) {
		      print "Hello {$name}!
";
		  }
	      }

	      // As of PHP 5.3.0
	      call_user_func_array(__NAMESPACE__ .'Foo::test', array('Hannes'));

	      // As of PHP 5.3.0
	      call_user_func_array(array(__NAMESPACE__ .'Foo', 'test'), array('Philip'));

	      ?>

	      The above example will output something similar to:

	      Hello Hannes!
	      Hello Philip!

       Example #3

	      Using lambda function

	      <?php

	      $func = function($arg1, $arg2) {
		  return $arg1 * $arg2;
	      };

	      var_dump(call_user_func_array($func, array(2, 4))); /* As of PHP 5.3.0 */

	      ?>

	      The above example will output:

	      int(8)

NOTES

       Note

	       Before  PHP  5.4,  referenced  variables  in $param_arr are passed to the function by reference, regardless of whether the function
	      expects the respective parameter to be passed by reference. This form of call-time pass by reference does  not  emit  a  deprecation
	      notice,  but  it is nonetheless deprecated, and has been removed in PHP 5.4. Furthermore, this does not apply to internal functions,
	      for which the function signature is honored. Passing by value when the function expects a parameter by reference results in a  warn-
	      ing  and	having call_user_func(3) return FALSE (there is, however, an exception for passed values with reference count = 1, such as
	      in literals, as these can be turned into references without ill effects -- but also without writes to that value having  any  effect
	      --;  do  not rely in this behavior, though, as the reference count is an implementation detail and the soundness of this behavior is
	      questionable).

       Note

	      Callbacks registered with functions such as call_user_func(3) and call_user_func_array(3) will not be called if there is an uncaught
	      exception thrown in a previous callback.

SEE ALSO

       call_user_func(3), information about the callback type, ReflectionFunction::invokeArgs, ReflectionMethod::invokeArgs.

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