পিএইচপি array_diff_ukey

<?php

$input = [
    "নাম" => "মোঃ আরিফ",
    "দেশ" => "বাংলাদেশ",
    "শহর" => "ঢাকা",
];

$allow = [
    "নাম" => true,
    "দেশ" => true
];

$invalid = array_diff_ukey($input, $allow, "strcasecmp");

print_r($invalid);

?>