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

说明

forward_static_call_array ( callable $function , array $parameters ) : mixed

Calls a user defined function or method given by the function 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().

参数

function: 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.

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

返回值

Returns the function result, or false on error.

范例

Example #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";
    }

?>

以上例程会输出：

B
B more,args 
C other,args

参见

forward_static_call() - Call a static method
call_user_func() - 把第一个参数作为回调函数调用
call_user_func_array() - 调用回调函数，并把一个数组参数作为回调函数的参数
is_callable() - 检测参数是否为合法的可调用结构

User Contributed Notes

israfilov93 at gmal dot com 15-Aug-2018 07:04


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());

nino dot skopac at gmail dot com 30-Jul-2016 02:49


Regarding namespaces:



Be sure to include fully namespaced class path:



<?php

forward_static_call_array(

    array('NAMESPACE\CLASS_NAME', 'STATIC_METHOD'),

    $params

);