call_user_func_array

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

call_user_func_arrayCall a callback with an array of parameters

Description

call_user_func_array(callable $callback, array $args): mixed

Calls the callback given by the first parameter with the parameters in args.

Parameters

callback

The callable to be called.

args

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
8.0.0 args keys will now be interpreted as parameter names, instead of being silently ignored.

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";
    }
}

call_user_func_array(__NAMESPACE__ .'\Foo::test', array('Hannes'));

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)));

?>

The above example will output:

int(8)

Example #4 Passing values by reference

<?php

function mega(&$a){
    
$a 55;
    echo 
"function mega \$a=$a\n";
}
$bar 77;
call_user_func_array('mega',array(&$bar));
echo 
"global \$bar=$bar\n";

?>

The above example will output:

function mega $a=55
global $bar=55

Notes

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

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