PHP - PHP Source Code File is a format that can also be found in many similar web pages. This is the type of file that is used on certain pages to process different forms online. You will also be able to get both the time and date and other information from databases using this file. The PHP engine is what is mainly used to process the PHP code alone. Everything is then delivered to the web browser that you are using. This is a wonderful file to have because it is extremely useful. You can view a page without any problems.