SERVER web page repository WEB PAGE instructions stores information and instructions BROWSER retrieves web page and follows instructions Server Web Server Pages Client Browser 1 3 2

 Two places you can change › Browser: JavaScript › Server: php  General rule: › do it in the browser if you can  Consider the difference in the date function… Server Web Server Pages Client Browser 1 3 2

 Retrieve the web page  Reads each line › If NOT php, sends it on › If php,  Performs the action  Sends it on Server Web Server Pages 3 2

 If I look in komodo edit…  If I look through view page source… Server Web Server Pages Client Browser 1 3 2

 Files must be.php rather than.html › Servers will find and use index.php as the default if there is no index.html  PHP command format › › Commands always end with ;  Command of interest is › include(“file name”)

 Single line › // comment  Multiple line › /* line › continues */  For includes, optional

 You MAY, you NEED NOT  If you are interested, › Decide what function it brings › Command specifically to look at  echo to create text for HTML › May want to start with  date