PHP: key() function
PHP: Fetch a key from an array
The key() function is used to get the index element of the current array position.
Version:
(PHP 4 and above)
Syntax:
key(array_name)
Parameter:
| Name | Description | Required / Optional |
Type |
|---|---|---|---|
| array_name | Array to use. | Required | Array |
Return value:
The key of the current array element
Value Type : Mixed*.
*Mixed : Mixed indicates that a parameter may accept multiple (but not necessarily all) types.
Example:
<?php
$subjects = array("Subject1" => "Physics", "Subject2" => "Chemistry", "Subject3" => "Biology");
echo "Current position Key is : " . key($subjects);
?>
Output:
Current position Key is: Subject1
Pictorial Presentation:
View the example in the browser
Practice here online:
See also