array_key_exists
reactphp/event-loop
Supported Versions: PHP 4 >= 4.0.7, PHP 5, PHP 7, PHP 8
Checks if the given key or index exists in the array
Alias
key_exists
<?php array_key_exists
(
string
|
int
|
float
|
bool
|
resource
|
null $key
, array
$array
):
bool