PHP

1
PHP

• Professor Waterman

2
Agenda

• What is PHP
• Versions
• HTML
• Dynamic Web sites
• Interactive Web Sites
• Installing PHP
• Transfer pages to a Web hosting service

• Who uses PHP
• Language Basics
• Database manipulation
• Server-side Processing
• Object-oriented
• Increased Security
• Cross platform
• Web Servers
• Development tools

3
History of PHP

• PHP succeeds an older product, named PHP/FI.
  PHP/FI was created by Rasmus Lerdorf in 1995,
  initially as a simple set of Perl scripts for
  tracking accesses to his online resume. He named
  this set of scripts 'Personal Home Page Tools'.
  As more functionality was required, Rasmus wrote
  a much larger C implementation, which was able to
  communicate with databases, and enabled users to
  develop simple dynamic Web applications. Rasmus
  chose to release the source code for PHP/FI for
  everybody to see, so that anybody can use it, as
  well as fix bugs in it and improve the code.

4
History of PHP

• PHP/FI, which stood for Personal Home Page /
  Forms Interpreter, included some of the basic
  functionality of PHP as we know it today. It had
  Perl-like variables, automatic interpretation of
  form variables and HTML embedded syntax. The
  syntax itself was similar to that of Perl, albeit
  much more limited, simple, and somewhat
  inconsistent.

5
History of PHP

• By 1997, PHP/FI 2.0, the second write-up of the C
  implementation, had a cult of several thousand
  users around the world (estimated), with
  approximately 50,000 domains reporting as having
  it installed, accounting for about 1 of the
  domains on the Internet. While there were several
  people contributing bits of code to this project,
  it was still at large a one-man project.

6
What is PHP

• A Popular scripting Language used to create
  powerful and dynamic Web sites.
• Currently used in over five million web sites
  around the world.
• PHP is open-source software
• free of charge
• No restrictions on the code you create
• PHP is server-side software
• Used to create database driven web sites

7
What is PHP
More importantly

• PHP is a thriving community of individuals from
• The learning communities
• Field of academic
• Programming
• sciences

There is an entire community of people out there
successfully communicating via the Web.
8
Versions

• PHP is constantly evolving and a new version of
  the language is released every few years. As a
  result, each new version of PHP offers more
  features than the previous versions.

9
HTML

• HyperText Markup Language (HTML) is the markup
  languauge used to create Web pages. PHP can be
  used to dynamically generate the HTML code for a
  Web page.
• PHP is embedded into HTML code with the use of
  special tags, called delimiters.
• Embedding PHP code into HTML code makes it
  possible to enhance existing Web pages on a Web
  site.

10
Dynamic Web Sites

• Dynamic Web sites contain Web pages that display
  constantly changing content. Using PHP, you can
  determine the content a Web page displays,
  depending on many different factors (i.e., you
  can have a page display different information
  depending on the date, time, and or users
  location.
• Dynamic pages increase the interest in your page
  more so than static pages

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Interactive Web Sites

• Allows visitors to your site the ability to
  exchange information between the Web site and the
  user.
• Allows Web developers to easily create Web pages
  that process information submitted by the user.
• Web sites are tailored to meet the needs of
  individual users-which in turn makes your site
  more appealing

12
Database Manipulation

• One of the most essential features of PHP is the
  ability to incorporate database into your Web
  site.
• You can work with a number of databases such as,
  MySQL, Oracle, and Sybase.
• Make the information store in the database
  available to users.
• With PHP ability to store and access database you
  can display up-to-date information for your
  visitors
• PHP can also allow users to manipulate the data
  in the database (users can edit and delete
  information).

13
Inserting PHP code into a Web page

• PHP code is inserted into HTML code using lt?php
  opening delimiter and ?gt closing delimiter.
• The delimiter tells the Web server where the PHP
  code begins and ends.
• You must use an opening and closing tag for each
  section of code.
• PHP code used to generate output must be
  inserted between the ltbodygt and lt/bodygt tags

14
Server-Side Processing

• A Web server processes all the PHP code in a Web
  page and translates the code into simple HTML
  code.
• Web developers do not have to take into
  consideration the type of Web browsers used by
  the clients. Any browser that can view Web pages
  can view pages containing PHP code processed by a
  Web server

15
Object-Oriented

• Object-Oriented programming is a type of
  programming that treats packages of code as
  distinct modules, or objects. Using objects can
  make a large Web application easier to manage.
• PHP supports object-oriented programming concepts
  that allow Web developers to write code in an
  oriented fashion.

16
Increased Security

• PHP is more secure than HTML because PHP code is
  processed on a Web server there users can not
  access the code used to create the PHP page.
• This makes it safer to create user names,
  passwords, and other sensitive data.
• If a user views the source code all he will see
  it the HTML code generated by PHP, not the PHP
  code itself.

17
Cross Platform

• PHP can be installed on computers using different
  Windows, MAC, and Unix operating systems.
• The majority of PHP code will work on any
  platform.

18
Web Servers

• You do not need a Web server to view the pages,
  however, you do need server software
• The server software would be Apache, Microsofts
  Web server products, Internet Information Server
  (IIS) and Personal Web Server (PWS).
• Server software and or a Web host service can
  also be used to store PHP pages

19
Development Tools

• PHP does not required special development tools,
  all you need is a text editor such as Notepad and
  a browser.
• There are a number of programs that were create
  to work with PHP such as Dreamweaver, Coldfusion,
  and Homesite

20
PHP Books

• PHP Professional Projects, by Ashish Wilfred,
  Meeta Gupta, and Kartik Bhatnagar Premier Press
• PHP Your visual blueprint for creating open
  source, server-side content
• Visual Quickpro Guide, PHP Advanced for the World
  Wide Web, Larry Ullman
• PHP Fast Easy web development, Julie C. Meloni

21
Web Resources

• www.php.net
• www.zend.com
• www.devshed.com
• www.phpbuilder.com
• www.webmonkey.com
• www.weberdev.com
• www.bravenet.com
• www.faqts.com

• Px.sklar.com
• www.phpusersgroups.org
• www.mysql.com
• www.e-gineer.com
• www.sourceforge.com
• www.hotscripts.com
• www.useit.com