PHP Is Is A Widely-used Open Source General-purpose Scripting Language That Is Especially Suited For Web Development And Can Be Embedded Into HTML.
PHP Code May Be Embedded Into HTML Or HTML5 Markup, Or It Can Be Used In Combination With Various Web Template Systems, Web Content Management Systems And Web Frameworks. PHP Code Is Usually Processed By A PHP Interpreter Implemented As A Module In The Web Server Or As A Common Gateway Interface (CGI) Executable. The Web Server Software Combines The Results Of The Interpreted And Executed PHP Code, Which May Be Any Type Of Data, Including Images, With The Generated Web Page. PHP Code May Also Be Executed With A Command-line Interface (CLI) And Can Be Used To Implement Standalone Graphical Applications
The Standard PHP Interpreter, Powered By The Zend Engine, Is Free Software Released Under The PHP License. PHP Has Been Widely Ported And Can Be Deployed On Most Web Servers On Almost Every Operating System And Platform, Free Of Charge.