PHP 7.1.21 Released

IteratorIterator::key

(PHP 5 >= 5.1.0, PHP 7)

IteratorIterator::keyGet the key of the current element

说明

public scalar IteratorIterator::key ( void )

Get the key of the current element.

参数

此函数没有参数。

返回值

The key of the current element.

参见

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