<?php
class Palindrome
{
    public static function isPalindrome($word)
    {
         $wordCase = self::ignoreCase($word);

         if($wordCase == strrev($wordCase))
         {
             return true;
         }

            return false;
    }

    private function ignoreCase($word)
    {
        return strtolower($word);
    }
}

echo Palindrome::isPalindrome('deleveled');