HTML is the HyperText Markup Language, used for giving structure to the information exchanged on the RESPONSE: Hello World Browser then receives and renders the HTML Doesn’t know that it’s been generated dynamically Ĩ The Database SQL – The “Supplier” Data is stored in tables and columns PHP is designed to handle HTTP communication Apache module (other options are available) Embedded into HTML using tags Provides “super-globals” for accessing information about the request $_GET – GET query string variables $_POST – POST variables $_COOKIE – Other cookie variables $_SESSION – Internal session information using a session ID ħ The Process HTML – The “Goods” PHP is designed to process hypertext

HTTP HyperText-Transfer-Protocol Key concept: stateless After request-response cycle is over, neither knows of each other One of the issues of security or “hi-jacking” Cookies are utilized to maintain a session Server keeps knowledge that a client existed, identified by a cookie left on the browser For such things as knowing whether a user is logged in or not Different types of requests GET – includes optional query string – read-only POST – can also include query string – write or read HyperText Transfer Protocol Secure – HTTPS Encrypts the communication channel through a SSL certificate

The Cast HTTP, Apache, MySQL and PHP Key concept: client – server model This exchange is the request-response cycle HTTP – Protocol used to communicate Apache – The web server MySQL – Provides content/data to display PHP – PHP Hypertext Preprocessor within Apache AMP: Acronym for three key software components Basis of modern, dynamic, web/internet applications Apache Provides the transit MySQL Provides the data PHP Provides the processing – the “glue” Bootup Open Forums CTO-level technical introduction to key technology Interactive throughout – relevant Q&A will drive content Laptops welcome although not required (not yet) Semi-weekly – recommend topics yourself Community involved - lead a BOF yourselfĢ Introduction to PHP and MySQL The Dynamic Duo for a Dynamic WebīOF #2 April 12th, 2010 Hans Zaunere, Managing Member ģ Overview The Cast and Key Concepts HTTP The Request The Process

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