How to make all array keys lowercase in PHP?
You can do this with simple loop, but there is another, even simpler way.
PHP has its own array_change_key_case
function that allows us to do so.
array_change_key_case($array, 'CASE_LOWER');
Example:
<?php
$exampleArray = [
"Animal" => "dog",
"Name" => "Peter",
"Size" => "Small",
];
$exampleArray = array_change_key_case($exampleArray, CASE_LOWER);
print_r($exampleArray);
?>