WeakRef
PHP Manual

Weakref::valid

(PECL weakref >= 0.1.0)

Weakref::validChecks whether the object referenced still exists

说明

public bool Weakref::valid ( void )

Checks whether the object referenced still exists.

参数

此函数没有参数。

返回值

Returns TRUE if the object still exists and is thus still accessible via Weakref::get(), FALSE otherwise.

参见


WeakRef
PHP Manual