<?php
class Palindrome
{
    public static function isPalindrome($word)
    {
        // Ignore the case
        $word = strtolower($word);
        // length to loop
        $length = strlen($word);
        // array length
        $length--;
        for ($i = 0; $i < ($length/2); $i++) {
            if ($word[$i] != $word[$length-$i]) { //checking string equal
                return false;
            }
        }

        return true;
    }
}

echo Palindrome::isPalindrome('Deleveled');