CachingIterator::offsetExists

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

CachingIterator::offsetExists — The offsetExists purpose

说明

public CachingIterator::offsetExists(string $key): bool
警告

本函数还未编写文档，仅有参数列表。

参数

key

The index being checked.

返回值

Returns true if an entry referenced by the offset exists, false otherwise.