array_key_first()
Get the first key of the given array without affecting the internal array pointer.
No Hooks.
Return
String|Int|null
. The first key of array if the array is not empty; null otherwise.
Usage
array_key_first( $arr );
- $arr(array) (required)
- An array.
Changelog
Since 5.9.0 | Introduced. |
Code of array_key_first() array key first WP 6.0
function array_key_first( array $arr ) { foreach ( $arr as $key => $value ) { return $key; } }