WeakMap::valid

(PECL weakref >= 0.2.0)

WeakMap::valid — Returns whether the iterator is still on a valid map element

说明

public WeakMap::valid ( void ) : bool

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.

相关文章
php cachingiterator check whether the inner iterator has a valid next elementphp cachingiterator check whether the current element is validphp domtext returns whether this text node contains whitespace in element contentphp map returns whether the map is emptyphp filteriterator check whether the current element of the iterator is acceptablephp filteriterator check whether the current element is validphp limititerator check whether the current element is validphp parentiterator check whether the inner iterator s current element has childrenphp phar returns whether the given filename is a valid phar filenamephp recursivecachingiterator check whether the current element of the inner iterator has childrenphp recursivecallbackfilteriterator check whether the inner iterator s current element has childrenphp recursivefilteriterator check whether the inner iterator s current element has childrenphp recursiveregexiterator returns whether an iterator can be obtained for the current entryphp sdo das xml 函数 returns root element s namephp simplexmliterator check whether the current element is validphp splobjectstorage returns if the current iterator entry is validphp weakmap advances to the next map elementphp weakmap checks whether a certain object is in the mapphp weakmap rewinds the iterator to the beginning of the mapphp weakmap returns whether the iterator is still on a valid map element
关注编程学问公众号