array_key_first
(PHP 7 >= 7.3.0)
array_key_first — Gets the first key of an array
Description
Get the first key of the given array without affecting
the internal array pointer.
Parameters
-
array -
An array.
Return Values
Returns the first key of array if the array is not empty;
NULL otherwise.
Examples
Example #1 Basic array_key_first() Usage
<?php
$array = ['a' => 1, 'b' => 2, 'c' => 3];
$firstKey = array_key_first($array);
var_dump(firstKey);
?>
The above example will output:
string(1) "a"
See Also
- array_key_last() - Gets the last key of an array
- reset() - Set the internal pointer of an array to its first element
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