Using Tokeniser

Your PHP	Output PHP
<html> <head> <script type=text/javascript> // Here is a Javascript comment var thevar=0; </script> </head> <body> <p>Well, I never. This is HTML.</p> <?php // This is a comment /* This is a second style of comment */ $phpvar='This is PHP'; for ($i=0; $i < strlen($phpvar); $i++) { echo substr(substr($phpvar, $i),0,1); } ?> </body> </html>