Question mark equals, doesn't work on php

Question

this is my php code:

Hey!: 

It just prints \"Hey!:\" Whats wrong wi

Answer 1

You need to set short_open_tag to 1

http://php.net/manual/en/ini.core.php

Answer 2

Short tags (which you're using here) can be turned on or off depending on the server you're running the code on. If it's your server, look in php.ini

Answer 3

Does your file end in .php and will it execute as php on your webserver? add

<?php echo "yes I run php!<br>\n"; ?>

to your file to be sure. View source to see what happened to the php tags. Then maybe switch on short tags as the other answers told you to.