Well, it is correct PHP as it is missing an opening "<?php" tag. Therefore the interpreter skips this part and prints it out. :D When interpreting as PHP howev

Well, it is correct PHP as it is missing an opening "<?php" tag. Therefore the interpreter skips this part and prints it out. :D When interpreting as PHP however if(isset($_SESSION['uid'])) header("Location: reg"); } is either missing an opening bracket or has got one too many closing brackets.