array_key_first — Gets the first key of an array

时间:2020-05-11 19:27:54   收藏:0   阅读:49

 

说明

array_key_first ( array $array ) : mixed

Get the first key of the given array without affecting the internal array pointer.https://www.bzddrive.com/

参数

array

An array.

返回值

Returns the first key of array if the array is not empty; NULL otherwise. 

原文:https://www.cnblogs.com/furuihua/p/12870162.html

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