forward_static_call_array

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

forward_static_call_array — Call a static method and pass the arguments as array

Beschreibung

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

Calls a user defined function or method given by the callback parameter. This function must be called within a method context, it can't be used outside a class. It uses the late static binding. All arguments of the forwarded method are passed as values, and as an array, similarly to call_user_func_array().

Parameter-Liste

callback: The function or method to be called. This parameter may be an Array, with the name of the class, and the method, or a String, with a function name.
parameter: One parameter, gathering all the method parameter in one array.

Hinweis:
Note that the parameters for forward_static_call_array() are not passed by reference.

Rückgabewerte

Returns the function result, or false on error.

Beispiele

Beispiel #1 forward_static_call_array() example

<?php

class A
{
    const NAME = 'A';
    public static function test() {
        $args = func_get_args();
        echo static::NAME, " ".join(',', $args)." \n";
    }
}

class B extends A
{
    const NAME = 'B';

    public static function test() {
        echo self::NAME, "\n";
        forward_static_call_array(array('A', 'test'), array('more', 'args'));
        forward_static_call_array( 'test', array('other', 'args'));
    }
}

B::test('foo');

function test() {
        $args = func_get_args();
        echo "C ".join(',', $args)." \n";
    }

?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

B
B more,args 
C other,args

Siehe auch

forward_static_call() - Call a static method
call_user_func() - Ruft die Callback-Funktion auf, die als erster Parameter übergeben wurde
call_user_func_array() - Call a callback with an array of parameters
is_callable() - Prüft, ob ein Wert als Funktion aus dem aktuellen Bereich aufgerufen werden kann.

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User Contributed Notes 2 notes

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nino dot skopac at gmail dot com ¶

8 years ago


Regarding namespaces:

Be sure to include fully namespaced class path:

<?php
forward_static_call_array(
    array('NAMESPACE\CLASS_NAME', 'STATIC_METHOD'),
    $params
);

down

israfilov93 at gmal dot com ¶

6 years ago


one of academic example, when forward_static_call() can be useful

<?php

class A
{
    public static function test()
    {
        var_dump('we were here');
        return static::class;
    }
}

class B extends A
{
    public static function test()
    {
        return self::class;
    }
}

class C extends B
{
    public static function test()
    {
        $grandParent = get_parent_class(parent::class); // $grandParent is A
        return forward_static_call([$grandParent, __FUNCTION__]); // calls A::test()
    }
}

// prints 
// string(12) "we were here"
// string(1) "C"
var_dump(C::test());

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