WeakMap::currentWeakMap::key
(PECL weakref >= 0.2.0)
WeakMap::key — Returns the current key under iteration.
说明
public object WeakMap::key
( void
)
Returns the object serving as key in the map, at the current iterating position.
参数
此函数没有参数。
返回值
The object key currently being iterated.
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