1. PHP / MySQL Introduction
Welcome!!

2. Scripting Client Side Scripting Server Side Scripting
Scripts are run by the browser
E.g. JavaScript, VBScript
Server Side Scripting
Utilizes web server technology
Scripts are run on the web server
User requests is fulfilled by running script on server to generate dynamic web pages
E.g. PHP, ASP, Perl, Ruby, Java Server Pages

3. PHP Intro High level scripting language
Designed by Rasmus Lerdorf 1995
Open source
Support for object oriented programming
Similar to shell scripting language combined with C language
Mainly used for web scripting

4. PHP Intro (cont.)
Supports cookies, forms, sessions, network sockets,
Supports databases: MySQL, Oracle, MS SQL, dbase, Sybase, DB2
PHP instructions can be embedded within HTML – right into the web page so when loaded PHP executes the code
Most recent version: 5.38

5. MySQL Intro Most popular open source database
Relational database – data stored in tables
Uses client / server model
Supports sql structured query language – the standard langauge used by most db
Fast, reliable, easy to use
Connectivity, speed, security – highly suitable for accessing db on the internet
Open source – owned by Oracle

6. Advantages of MySQL & PHP
Work very well together
PHP – simple, powerful scripting
MySQL – solid, reliable db
Perfect combination for building db driven dynamic websites

7. Advantages of PHP/MySQL
High Performance
PHP provides developers capability to rapidly release and update software on the web
MySQL – response time and throughput meet demanding application needs
Built in Library
PHP libraries built to address common web development tasks
Library functions often made available to PHP community

8. Advantages of PHP/MySQL (cont.)
Extensibility
Developers around the world contribute add-on modules to extend functionality
Allows applications to stay current
Can obtain source code if desired
Relatively Low Cost
No licensing fees
Runs on any platform – wide range of choices
PHP developers share info – up to date, reliable

9. Advantages of PHP/MySQL
Portable
Runs on most platforms
Linux, Windows, Mac, Solaris
Can copy from one server and move to another
Developer Community
Huge following
Can find support on web, post problems, etc
Ease of learning
Relatively easy to learn
PHP: similar to other languages, especially Perl
MySQL – Uses SQL, if you know other db can learn quickly

10. Static Web Site Displays HTML code, nothing else, no interactivity
Client connects to apache server & requests html page (user types in URL)
When client connects, server returns requested page
Server is the middleman
Static Web Site
HTML Page
(web browser)
Apache Server
Client

11. How Dynamic Web Works Apache Web Browser Send Form Request Form
Submit Form
Confirm
Get Confirmation
User types in URL
Web browser requests form
Apache sends back form
User fills in form and submits it
Apache gets confirm message and sends it back
Browser displays confirm message

12. Dynamic Web – with Database Demonstrates one way process: only putting data in the database
Database Apache Web Browser
Send Form
Request Form
Database
Confirm
Submit Form
Get Confirm
Filling in form and want to store contents of form in a database
This adds an extra step –website receives contents of form,
web site puts the data in the database
Sends confirmation back to browser

13. Common Situation: User fills in form and gets data from the database
Database Apache Web Browser
Send Form
Request Form
Find Data
Request Data
Submit Form
Send Results
Results
In the form , the user fills in request details (such as a search form)
The server receives the search string and requests the results from the database
Database finds the data and returns results to the server
Server takes results and sends to the browser

14. How steps work using components HTTP, Apache, PHP, MySQL
Database Apache Web Browser 2. 1.
Send Form
Request Form 5. 4. 3.
Find Data
Request Data
Submit Form 6.
Send Results 7.
Results

15. Steps User types in web address to access site
Browser connects to apache server which has html and php file that form the website. Apache services the request and sends the client the web page containing the html form
User fills in the form and submits to the server

16. Steps (cont.)
Apache receives the form and loads the file to handle form submission
File contains php code to connect to the database
PHP code is passed to the PHP interpreter and is run by the interpreter
PHP connects to the MySQL database (may or may not be on the same server)
When connected to MySQL, a request is made for info using SQL (language for communicating with database)

17. Steps (cont.)
MySQL database receives SQL request and finds information. Result sent back to the PHP script that made the request
PHP script receives result and constructs an HTML page with the results. Sends the HTML page back to the web browser client
Web Browser receives HTML result and displays it to the user