forward_static_call_array()

(PHP 5 >= 5.3.0, PHP 7)

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$functionparameter. This function must be called within a method context, it can't be used outside a class. It uses thelate static binding. All arguments of the forwarded method are passed as values, and as an array, similarly tocall_user_func_array().

参数

$function: The function or method to be called. This parameter may be anarray, with the name of the class, and the method, or astring, with a function name.
$parameter: One parameter, gathering all the method parameter in one array.
Note:
Note that the parameters forforward_static_call_array()are not passed by reference.

返回值

Returns the function result,orFALSEon error.

范例

Example #1forward_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
callback类型的信息

Regarding namespaces:
Be sure to include fully namespaced class path:
<?php
forward_static_call_array(
  array('NAMESPACE\CLASS_NAME', 'STATIC_METHOD'),
  $params
);

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());