PHP: call_user_func_array

Beschreibung

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

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

Parameter-Liste

callback

The callable to be called.

args

The parameters to be passed to the callback, as an array.

If the keys of args are all numeric, the keys are ignored and each element will be passed to callback as a positional argument, in order.

If any keys of args are strings, those elements will be passed to callback as named arguments, with the name given by the key.

It is a fatal error to have a numeric key in args appear after a string key, or to have a string key that does not match the name of any parameter of callback.

Rückgabewerte

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

Changelog

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

Beispiele

Beispiel #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"));
?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

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

Beispiel #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'));

?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

Hello Hannes!
Hello Philip!

Beispiel #3 Using lambda function