PHP is an cross-platform embedded scripting language. While that doesn't sound like much, PHP is extremely powerful—take our word for it. PHP can be used to add limitless functionality to your web site. From small tasks like form processing and mailing list management to larger tasks like e-commerce and content management. PHP is also one of the easiest ways to interact with your MySQL database and (with some work) can be used together to build a database driven web site.