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PHP stands for PHP: Hypertext Preprocessor and is a widely-used, open source server-side scripting language. PHP is one of the most user-friendly, easy to learn languages available. PHP can be used for:Generating dynamic web page content. Creating, opening, reading, writing, deleting, and deleting files on a server. Sending and receiving cookies in a database. Controlling user-access. Encrypting data. Using the.php command to print out what's within the single quotes, and we end each line with a semicolon.