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.

注意:
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

示例 #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

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User Contributed Notes 2 notes

down

nino dot skopac at gmail dot com ¶

5 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 ¶

3 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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备份地址：http://www.lvesu.com/blog/php/function.forward-static-call-array.php