Write a program in PHP to reverse a number

A number can be written in reverse order.

For example

12345 = 54321

<?php  

$num = 23456;  

$revnum = 0;  

while ($num > 1)  

{  

$rem = $num % 10;  

$revnum = ($revnum * 10) + $rem;  

$num = ($num / 10);   

}  

echo "Reverse number of 23456 is: $revnum";  

?>