Transcript PHP Powerpoint Presentation

PHP
Hypertext Preprocessor
May 11, 2011
Open Sourced led to high growth - ppl fixing and
updating all of the time to create the best
code.
What is the technology?
open source solutions - learn from them
and modify.
scripting lang - command code for
controlling some time of program,
operating system, software, hardware and
websites.
stored only in the code or a stored set of
commands, user of program will never
see it.
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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?
Cross platform - for the most part.
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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
still one man project
History
3.0 was still considered
underpowered for
eCommerce
9 months in public testing
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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
Use has declined slightly but
it’s still 5th most common
language on the web
according to the TIOBE
community index
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.
Certification
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other certifications exist but
are not as credible.
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
Related/Competing Technologies
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Perl- PHP was designed only for scripting for the web, while Perl was
designed for a lot more, making it much
more complicated. PHP is
copy and pasted? if not
writesand
realllly has
well. all of the
much easier to integrate into existingsomeone
HTML
functionality of Perl without making it as complex. Perl has
maintained a steady language since the 80’s but PHP is quickly
evolving and catching up to Perl’s standards.
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ASP (Active Server Pages) - coded by Visual Basic Script, Jscript and
C#. Only available on Microsoft Internet Information Server and is
much slower than PHP.
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ColdFusion- PHP is available on almost every platform while
ColdFusion, like ASP, is limited. Although ColdFusion has more
limitations, it was designed with non-programmers in mind so it is
much easier to pick up than PHP.
Short tag- cause conflicts with XML parsers ( c
to XML DOM)
Best Practices for PHP
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standard way for accessing and manipulating X
documents.
presents an XML document as a tree-structure.
sharing/distributing code -> others will have to
theirs to fit theirs
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.
Live examples
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Facebook
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Yahoo
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Digg
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Wikipedia
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Photobucket
mention accessibility here.
Dynamic web pages are
easier to use b/c they require
less typing.
Does Wikipedia, actually us
PHP?
Cake PHP= an open source web application
framework, it keeps you from building web apps
from scratch.
PHP is here to stay,
Future seems to be in constant improvements in
compatibility and semantics.
No serious paradigm shifts on the horizon
Future of PHP
Cake PHP