PHP Manual
Array Functions
Gets the last key of an array

array_key_last

(PHP 7 >= 7.3.0, PHP 8)

array_key_last — Gets the last key of an array

Description

array_key_last(array $array): int|string|null

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

Parameters

array: An array.

Return Values

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

See Also

array_last() - Gets the last value of an array
array_key_first() - Gets the first key of an array
end() - Set the internal pointer of an array to its last element