Menjawab pertanyaan : https://www.testdome.com/questions/php/palindrome/7320?visibility=1&skillId=5

palindrom_test.php

<?php
class Palindrome
{
    public static function isPalindrome($word)
    {
        $wd = strtolower($word);
        if ($wd == strrev($wd)){
            return true;
        }
        return false;
    }
}

echo Palindrome::isPalindrome('Deleveled');