WeakMap::rewindWeakMap::valid
(PECL weakref >= 0.2.0)
WeakMap::valid — Returns whether the iterator is still on a valid map element
说明
public bool WeakMap::valid
( void
)
Returns whether the iterator is still on a valid map element.
参数
此函数没有参数。
返回值
Returns TRUE if the iterator is on a valid element that can be
accessed, FALSE otherwise.
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