Web developing File Formats

HTML, CSS, PHPHtml: Web page coded in HTML that can be displayed in a Web browser; formats text, tables, images, and other content that is displayed on the page; most pages within static websites have an ".html" extension.
Css: Used for formatting the contents of a Web page, such as fonts and tables; can define the type, size, color, style, line spacing, and indentation of text; may also describe table padding, spacing, borders; also may be used to position objects on the page.
Php: Web page that may contain PHP code; may include PHP functions that can process online forms, get the date and time, or access information from a database, such as MySQL database.

FLA
Editable movie or animation created with Adobe Flash; often saved as a .SWF file for use on the Web; the FLA file is the editable project file saved by the Flash development program; the SWF (or "swiff") file is a compressed format that is viewable in most Web browsers with the Flash plugin.