.PHP4 File Extension
What is a PHP4 file?
Web page that may include PHP 4 code; the PHP script is parsed by a PHP engine on the Web server before being sent to the user's Web browser; the script then generates HTML code, which is sent to the user's browser; PHP pages are often used to access database information, such as data from a MySQL database.
PHP4 pages can be processed and run on a Web server with the PHP engine installed. Examples include Apache, Windows Server, and Mac OS X Server. They can also be edited with a text editor.
Most PHP pages use the standard .PHP file extension.