How to use array_change_key_case Function in PHP?

Now let’s see example of how to use array_change_key_case function in php.

1. Code:

<?php
function changeKeyCaseOfArrAY($array){
	$array = array_change_key_case($array,CASE_UPPER);
    return $array;
} 
    $array=array("Peter"=>"35","Ben"=>"37","Joe"=>"43");
    print_r(changeKeyCaseOfArrAY($array));
?>

2. Example:

Input:

array("Peter"=>"35","Ben"=>"37","Joe"=>"43")

Output:

Array ( [PETER] => 35 [BEN] => 37 [JOE] => 43 )

PHP