What Can PHP Do? (Short for Hypertext Preprocessor) PHP can generate dynamic page content. (Ex - Facebook Newsfeed) PHP can create, open, read, write, delete, and close files on the server automatically. PHP can collect form data. PHP can send and receive cookies. PHP can add, delete, modify data in your database. PHP can restrict users to access some pages on your website. PHP can encrypt data With PHP you are not limited to output HTML. You can output images, PDF files, and even Flash movies. You can also output any text, such as XHTML and XML.