PHP : key() function

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Description

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

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

View the example in the browser

See also

PHP Function Reference