PHP

  • PHP is an acronym for "PHP Hypertext Preprocessor"
  • PHP is a widely-used, open source scripting language
  • PHP scripts are executed on the server
  • PHP costs nothing, it is free to download and use

PHP File

  • PHP files can contain text, HTML, CSS, JavaScript, and PHP code
  • PHP code are executed on the server, and the result is returned to the browser as plain HTML
  • PHP files have extension ".php"