(PHP 4 >= 4.0.4, PHP 5)

call_user_func_arrayCall a user function given with an array of parameters


mixed call_user_func_array ( callback $function , array $param_arr )

Call a user defined function with the parameters in param_arr.



The function to be called.


The parameters to be passed to the function, as an indexed array.

Return Values

Returns the function result, or FALSE on error.


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 interpreted as static.


Example #1 call_user_func_array() example

function foobar($arg$arg2) {
__FUNCTION__" got $arg and $arg2\n";
foo {
bar($arg$arg2) {
__METHOD__" got $arg and $arg2\n";

// 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() using namespace name


namespace Foobar;

Foo {
    static public function 
test($name) {
"Hello {$name}!\n";

// 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


= function($arg1$arg2) {
$arg1 $arg2;

var_dump(call_user_func_array($func, array(24))); /* As of PHP 5.3.0 */


The above example will output:




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 will most likely be removed in the next version of PHP. 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 warning and having call_user_func() return FALSE (does not apply if the passed value has a reference count = 1).


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

See Also

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