CachingIterator::offsetExists
(PHP 5 >= 5.2.0, PHP 7, PHP 8)
CachingIterator::offsetExists — The offsetExists purpose
說明
public CachingIterator::offsetExists(string
$key): bool警告
本函式還未編寫文件，僅有參數列表。
參數
-
key -
The index being checked.
返回值
Returns true if an entry referenced by the offset exists, false otherwise.