PHP file

A PHP file is a text file which has the .php filename extension.

PHP code

PHP files contain PHP code, or a mix of PHP code and HTML.

PHP code

The PHP code goes inside one or more PHP code islands.

Web browsers and PHP

In order for a web browser to view a PHP file as a web page, the browser must make a request (computing) to a web server, so the server can process the PHP code and send a response to the server.

Web browsers cannot use the "Open File" command to view a PHP file. "Open File" works with HTML pages. But the PHP code in a PHP file must be processed by a web server. The browser does not process the PHP.

See also

• Computer file
• File extension
• PHP code island