IteratorIterator::key
(PHP 5 >= 5.1.0, PHP 7, PHP 8)
IteratorIterator::key — 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.
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(PHP 5 >= 5.1.0, PHP 7, PHP 8)
IteratorIterator::key — Get the key of the current element
此函数没有参数。
The key of the current element.
add a note
