« WeakMap::count WeakMap::key » PHP Manual WeakMap Returns the current value under iteration WeakMap::current (PECL weakref >= 0.2.0) WeakMap::current — Returns the current value under iteration 说明 public WeakMap::current ( void ) : mixed Returns the current value being iterated on in the map. 参数 此函数没有参数。 返回值 The value currently being iterated on.