IteratorIterator::valid

(PHP 5 >= 5.1.0, PHP 7)

IteratorIterator::validChecks if the iterator is valid

说明

public bool IteratorIterator::valid ( void )

Checks if the iterator is valid.

参数

此函数没有参数。

返回值

Returns TRUE if the iterator is valid, otherwise FALSE

参见

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User Contributed Notes 1 note

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mike at eastghost dot com
9 months ago
An Iterator is "valid" when it has additional elements, beyond its element index.

Said another way: After an Iterator is next()'d to its final element, the Iterator is no longer "valid".

Said another way: A "hasNext" check would simply return ::valid()
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