Palindrome Number Program in PHP

Palindrome number in PHP : A palindrome number is a number such that if we reverse it, it will not change. For example some palindrome numbers examples are 121, 212, 12321, 454, 545, 666, 222, 111. To check whether a number is palindrome or not first we reverse it and then compare the number obtained with the original, if both are same then number is palindrome otherwise not. PHP program for palindrome number is given below.
For example we reverse 121 result will be 121 so it is palindrome number.

Steps to check number is palindrome or not
Take a number.
Reverse the input number.
Compare both the numbers.

PHP Palindrome Number program

<?php

$num = 121;
$p=$num;
$revnum = 0;
while ($num != 0)
{
$revnum = $revnum * 10 + $num % 10;
//below cast is essential to round remainder towards zero
$num = (int)($num / 10); 
}
 
if($revnum==$p)
{
echo $p," is Palindrome number";
}
else
{
echo $p." is not Palindrome number";
}

?>

Output

121 is Palindrome number

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