Transcript PHP Presentation

PHP
Hypertext Preprocessor
May 11, 2011
What is the technology?
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Server side scripting and programming language.
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Can be embedded in HTML
Free and open sourced - community
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frequently updates and fixes bugs
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downloadable templates and open source solutions
What is the technology?
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Cross-platform - use any OS server.
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Can relay information about specific users to produce certain results
(Echo)
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Facebook uses this language to target users with custom
advertisements
Who? When?
Why?
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Rasmus Lerdorf, in 1995
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wanted to see how many
people were looking at his
resume
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released source code to public
- help improve and fix bugs
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More compatible across
multiple platforms than C, but
more limited than Perl
History
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1997 - PHP 2.0, lots of initial bugs fixed, as many as 50,000 domains
had it installed (1% of all domains on the Internet at the time)
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1998 - PHP 3.0, most resembles what we know today. Re-written by
Andi Gutmans and Zeev Suraski (halted production of PHP 2.0)
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tremendous success, “object oriented syntax support” (attracted
developers)
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broadened scope, not just for personal home page use
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At its peak, it was installed on ~10% of all Web servers
^ Suraski - Gutman ^
History
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1999 - PHP 4.0, Gutmans and Suraski began rewrite, focused on
modularity and performance
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supported more Web servers, HTTP sessions, output buffering,
higher security for personal data
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several million sites had it installed, accounting for over 20% of
all Web domains.
2004 - PHP 5.0, uses Zend Engine 2.0
Percentage of top websites
Best Practices for PHP
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Make sure to always use long form of open tags <?php
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never use short hand <?
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Code to a set standard (Zend Framework)
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Learn and follow the PHP Manual
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Make sure to comment your code and changes but also use
meaningful and consistent naming.
PHP Managment
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Open source community.
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Centered around Zend: PHP company founded by Gutmans and
Suraski
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Zend and PHP developers receive significant funding from venture
capitalist firms and from companies like Intel.
Related/Competing Technologies
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Perl
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ASP (Active Server Pages)
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ColdFusion
Certification
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Zend Certification: http://www.zend.com/en/services/certification
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most credible
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costs between $125 and 160, but include yellow page listing
W3 School Certification: http://www.w3schools.com/cert/cert_php.asp
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taken online, decreased credibility, $75
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quick and easy, but not for serious professionals
Future of PHP
Cake PHP
Live examples
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Amazon
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Facebook
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Yahoo
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Digg
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Photobucket