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About Dynamic Sites
(Front End / Back End Implementations)
by
Janssen & Associates
Affordable Website Solutions
for Individuals and Small Businesses
What Are PHP and MySQL?
PHP is a server-side scripting language designed specifically for the
Web. Within an HTML page, you can embed PHP code that will be
executed each time the page is visited. Your PHP code is interpreted at
the Web server and generates HTML or other output that the visitor will
see.
MySQL is a very fast, robust, relational database management system.
A database enables you to efficiently store, search, sort and retrieve
data. The MySQL server controls access to your data to ensure that
multiple users can work with it concurrently, to provide fast access to it
and ensure that only authorized users can obtain access.
One of the nice features of PHP is that it is available for Microsoft
Windows, for many versions of UNIX (Linux/Apache) , and with any
fully functional Web server. MySQL is similarly versatile.
PHP/MySQL Web Development
• Mastering the concepts
– Encompassing advanced PHP and MySQL
syntax, database design, Internet application
analysis and design and network security
• Building the applications
– Creating sophisticated, secure Web
applications that meet commercial, real-web
needs
PHP/MySQL Development Tools
• PHP
– The server-side scripting language that allows the website to be
truly dynamic
• MySQL
– The database construct that enables PHP and Apache to work
together to access and display data in a readable format to the
browser
• Apache
– Acts as your Web server by parsing any file requested by the
browser and displaying the correct results according to the code
within that file
Dynamic Site Applications
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User Authentication
E-commerce Sites (Shopping Carts)
Secure Transactions
Content Management Systems
Web-Based E-mail Service
Newsletter and Mailing List Manager
Web Discussion Forums (Chat Rooms)
More Dynamic Site Applications
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Online Address Book
Real-time Calendars
Log Files
Bulletin Board Systems
Online Polls
Visitor Accounts
Project Management
PHP/MySQL Web Development
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A user’s Web browser issues an HTTP request for a particular
Web page.
The Web server receives the request, retrieves the file and
passes it to the PHP engine for processing.
The PHP engine begins parsing the script. PHP opens a
connection to the MySQL server and sends on the appropriate
query.
The MySQL server receives the database query and processes it,
sending the results back to the PHP engine.
The PHP engine finishes running the script and formats the query
results nicely in HTML. It then returns the resulting HTML to the
Web server.
The Web Server passes the HTML back to the browser.
User Logins / Authentication
Update Data That Always Changes
The rates box below that is on
this website will automatically
be updated once the rate
table on the left is modified.
Update Member Profiles
After the member logs in successfully, they can change their
password, update the information in their database record and
upload a picture if they wish. The changes are then reflected on
their website page, which shows the updated information.
Add/Change/Delete Rentals
Shopping Cart Management
Below is the dynamic part of a website page, where the customer
maintains all product information in a database, which is generated
dynamically when this page is selected based on several criteria.
Real-Time Information/Reports
Guestbooks (Database-Driven)
Dynamic Contact Information
Advantages of PHP
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Read and write files
Gather and process form data
Send data via e-mail
Access and manipulate database records
Read and write cookies
Maintain data in session variable
Facilitate user authentication
High speed and stability over HTML
High levels of security
PHP is server-side code, so it can’t be viewed
Advantages of MySQL
• Cost-Effective
– MySQL is free for development
• Quick and Powerful
– For small to medium databases, MySQL is extremely
fast and is a relational database
• Improves All the Time
– The developers release updates frequently and are
adding impressive features all the time
Static Versus Dynamic Pages
There are many limitations when building websites using just
plain HTML.
Static content from a pure HTML website is just that --- static.
It stays the same unless you physically update it. Your users
can’t interact with the website in any meaningful fashion.
Using a dynamic language such as PHP and a database such
as MySQL allows you to make your website dynamic …
Dynamic websites are fully customizable and contain
real-time information.