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Call a user function given with an array of parameters


call_user_func_array

(PHP 4 >= 4.0.4, PHP 5)

call_user_func_arrayCall a user function given with an array of parameters

Description

mixed call_user_func_array ( callback $function , array $param_arr )

Call a user defined function with the parameters in param_arr.

Parameters

function

The function to be called.

param_arr

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

Return Values

Returns the function result, or FALSE on error.

Examples

Example #1 call_user_func_array() example

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

<?php

namespace Foobar;

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

<?php

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

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

?>

The above example will output:

int(8)

Notes

Note:

Referenced variables in param_arr are passed to the function by a reference, others are passed by a value. In other words, it does not depend on the function signature whether the parameter is passed by a value or by a reference.

Note:

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


Home>Manual>Call a user function given with an array of parameters