I checked what was getting echoed at the end and all the variables are getting echoed so those variables are getting passed through the check_form() function.

I did some further tests and I found that $old value was not getting assigned anything

The problem lies in this bit I believe

PHP: Select all

     else if(!ereg("^[A-Za-z]{2,30}$",$first_name)) {
  $error['first_name'] = true;
          $print_again = true;
   $old_value = $get_first_name; //This bit is causing the error
         $message="<li><span><b>Forename</b></span> must contain letters only</li>";
     }