Check Palindrome in PHP

<?php
class PalindromeExample {

    public function checkPalindrome() {
	    $originalNumber = 12321;

        $reverseNumber = 0;
        $temp = $originalNumber;

        while ($temp > 0) {
            $remainder = $temp % 10;
            $reverseNumber = ($reverseNumber * 10) + $remainder;
            $temp = (int)($temp / 10);
        }

        if ($originalNumber == $reverseNumber) {
            echo("The given number is Palindrome");
        } else {
            echo("The given number is NOT a Palindrome");
        }
    }
}

$obj = new PalindromeExample();
$obj->checkPalindrome();

<?php
class PalindromeExample {

    public function checkPalindrome() {
        
	$originalString = "Madam";
        $reverseString = "";

        $length = strlen($originalString);

        for($i = $length - 1; $i >= 0; $i --) {
            $reverseString = $reverseString . $originalString[$i];
        }

        // Case in-sensitive comparision
        if (strtolower($originalString) == strtolower($reverseString)) {
            echo("The given string is Palindrome");
        } else {
            echo("The given string is NOT a Palindrome");
        }
    }
}

$obj = new PalindromeExample();
$obj->checkPalindrome();