# array_key_last

(PHP 7 >= 7.3.0)

array_key_last — Gets the last key of an array

### 说明

array_key_last ( array `$array` ) : mixed

Get the last key of the given `array` without affecting the internal array pointer.

### 参数

`array`

  An array.

### 返回值

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

### 参见

- array_key_first() - Gets the first key of an array
- end() - 将数组的内部指针指向最后一个单元