PHP program to Reverse a number

Following php program builds reverses the given number using while loop

<?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";  
?>

Output:

Reverse number of 23456 is: 65432

Try it Online here https://onecompiler.com/php/3x73gq8hy