forward_static_call_array

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

forward_static_call_array — Call a callback with an array of parameters, preserving the current called class

Опис

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

Calls a user defined function or method given by the callback parameter, with arguments passed as an array, similarly to call_user_func_array(). When called from within a method context and calling a method callback, it makes a forwarding call, so static:: inside the method resolves to the same called class as in the caller. This is useful for static method callbacks that should behave like self:: or parent::.

Зауваження:
Unlike forward_static_call(), this function does not require an active class scope: calling forward_static_call() outside a class throws an Error, while this function does not.

Параметри

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

Зауваження:
To pass a parameter by reference, the corresponding element in args must be a reference.

Значення, що повертаються

Returns the function result, or false on error.

Приклади

Приклад #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";
    }

?>

Поданий вище приклад виведе:

B
B more,args 
C other,args

Прогляньте також

forward_static_call() - Call a callback while preserving the current called class
call_user_func() - Call the callback given by the first parameter
call_user_func_array() - Call a callback with an array of parameters
is_callable() - Verify that a value can be called as a function from the current scope

Found A Problem?

Learn How To Improve This Page • Submit a Pull Request • Report a Bug

＋add a note

User Contributed Notes 2 notes

down

nino dot skopac at gmail dot com ¶

10 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 ¶

8 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());

＋add a note