My output is not coming instead the whole code is being written on that page! What to do?

Answer 1

are u using running the code on local server

Answer 2

if u r not install xammp or wammp and paste your .php file in c/xammp/htdocs and open your browser and type localhost/yourfilename.php

Answer 3

as php is a server side scripting language you need to first install a web server.. you can use xampp on Linux or wampp on windows.
to check the setup is working fine u can use the following code.
<?php
phpinfo();
?>