MultipleIterator::key

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

MultipleIterator::key — Gets the registered iterator instances

说明

public MultipleIterator::key(): array|false

Get the registered iterator instances key() result.

警告

本函数还未编写文档，仅有参数列表。

参数

此函数没有参数。

返回值

An array of all registered iterator instances, or false if no sub iterator is attached.

错误／异常

A LogicException if mode MIT_NEED_ALL is set, and at least one attached iterator is not valid.

Calling this method from foreach triggers warning "Illegal type returned".

参见