Source Code displayed in the browser

This is a common error happens to beginners.
Possible reasons
1)Apache web server is not started or it is misconfigured
2)Missed to add php tags in the code
3)PHP short tags are not activated in php.ini configuration file

Common Errors In PHP Coding

Hi guys hope you are doing well.
Its being long time there is no new posts in the blog. Today I am publishing some errors which I have gone through.
Happy Coding :)