The array_keys Function
The array_keys function retrieves the keys
of an array and writes them to a new array.
Syntax
array_keys(array $array, mixed $search_value = null, bool $strict = false): array
Example
Let's get the keys from the array:
<?php
$arr = ['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5];
$res = array_keys($arr);
var_dump($res);
?>
Code execution result:
['a', 'b', 'c', 'd', 'e']
See Also
-
the
array_valuesfunction,
which retrieves array elements
