PHP: The Beginning and the Zend

Presentation by Jonathan Hawk.Available under the Creative Commons Attribution Share-Alike Non-Commercial license.

History

1994 Started development

1995-06-08 PHP/FI

1997-11-01 PHP/FI 2

1998-06-06 PHP 3

2000-05-22 PHP 4 (powered by Zend Engine)

2001-12-10 PHP 4.1 (superglobals)

2002-12-27 PHP 4.3 (CLI)

2004-07-13 PHP 5 (powered by Zend Engine II)

2009-06-30 PHP 5.3 (namespaces, closures)

http://upload.wikimedia.org/wikipedia/commons/a/ac/RasmuswJGang.jpg (public domain)

Rasmus Lerdorf

Joomla! Developers

Rasmus Lerdorf

Twitter: @rasmus

https://secure.wikimedia.org/wikipedia/commons/wiki/File:Rasmus_Lerdorf_cropped.jpg (CC-BY-SA)

http://www.flickr.com/photos/isthmene/4370546993 (CC-BY-NC)

Rasmus Lerdorf also has Canadian citizenship.

Andi Gutmans & Zeev Suraski

Twitter: @andigutmans/
@zeevs

https://secure.wikimedia.org/wikipedia/commons/wiki/File:Andi_Gutmans_1.jpg (CC-BY)
https://secure.wikimedia.org/wikipedia/commons/wiki/File:Zeev_Suraski_2005_cropped.jpg (CC-BY-SA)

http://www.flickr.com/photos/heyskinny/549085823 (CC-BY-NC)

Andi Gutmans is of Swiss descent

Use: When?

Web sites and Web applicationsEasy to learn* finally your web designers can help with the back end!*** = also easy to screw up

** = web designers should not help you with the back end

CLI scripts

GUI applications (PHP-GTK)

Available on Linux, Unix, Windows, Mac OS X, AS/400, Novell NetWare, OS/2, RISC OS, SGI IRIX 6.5.x, Solaris (SPARC, INTEL), Solaris OpenCSW packages

http://flickr.com/photos/sister_ray/3461372416 (CC-BY-NC)

What happens when your graphics people help with the back-end.

Use: Good Company

Use: Software

Most widely-used forums (phpBB, vBulletin)

Most widely-used CMSs (Drupal, Joomla!, ezPublish)

Most widely-used blogs (WordPress, Typo3, Serendipity)

Most widely-used wikis (MediaWiki, DokuWiki)

Most web-based e-mail (SquirrelMail, Roundcube, Kerio, Horde IMP)

Use: Web Slinger

PHP was made for web sitesWeb server module (ISAPI)Runs in same memory space as web server

Fast-CGI

CGI

Widely adopted most web hosting includes PHP and MySQL

Use: Tag Soup

Language: PHP in One Sentence

"What if C and Perl had a love child that Java babysat from time to time?"

Language: Borrowed

From Perl:String usage, type system, variable syntax, operators

PHP arrays appear to be a combination of Perl arrays and hashes

From C: (PHP is written in C, by the way)Function names

Pass-by-reference syntax

From Java:Class syntax, interfaces, exceptions

Language: Features

Dynamically and weakly typed

InterpretedSpeed through bytecode caches

ReflectiveTypes, Names

Both procedural and Object-oriented

Clone any object, serialize any object

Objects passed by reference

Arrays and primitives passed by value

Language: Typing

DynamicVariable types unnecessary, same variable can hold different types

Weak0 == 0.0 == false == null == "" == array()

1 == 1.0 == true == "!empty" == array('!empty') == $object

Methods expecting one type will convert from others"1234" will be converted to 1234.

"foobar" will be converted to 0.

Language: Classes

Namespaces

Public/protected/private members

Superclasses and interfaces

Abstract and final classes

Constructors and destructors

Language: Class Example

Language: Methods

Abstract, static, and final

ArgumentsOptionally type-hinted

"Overloading"

No return types

Language: Methods Example

Language: Docblocks

Docblocks often necessary for IDE code completion

http://www.flickr.com/photos/thebigdurian/374229490 (CC-BY-NC-SA)

Strengths

Strengths

Anonymous functions/closures

Variable method names

Magic methods

Arrays

Database connectivity

Date operations

Perl-Compatible Regular Expressions

Web-related stuff: file uploads, tag stripping, etc

Strengths: Closures

Strengths: Dynamic invocations

Strengths: Magic Methods

Strengths: Arrays

Strengths: Database Connectivity

CUBRID *

dBase

DB++

FrontBase

filePro

Firebird/InterBase *

Informix *

IBM DB2 (Plus Cloudscape and Apache Derby) *

Ingres

MaxDB

Mongo

ODBC *

mSQL

Microsoft SQL Server *

MySQL/Mysqli/Mysqlnd *

Oracle OCI8 *

Ovrimos SQL

Paradox

PostgreSQL *

SQLite/SQLite3 *

Sybase *

tokyo_tyrant

Bold = Built-in at compile time. * = PDO Driver available.

Strengths: Date Operations

strtotime Parses almost any date format"+1 year"

"-3 weeks"

"Last wednesday"

"Tomorrow 6:12pm"

"2010-01-12T12:21:12+0500"

"Wed, Mar 2, 2011 3:00 pm"

"date" displays dates

Strengths: PCRE

Strengths: Web stuff

Superglobals: $_GET, $_POST, $_COOKIE, $_SESSION, $_FILE, $_SERVER, $_ENV

htmlspecialchars(), htmlentities(), strip_tags(), nl2br()

header(), setcookie()

http://www.flickr.com/photos/thetrouseredape/3267689296 (CC-BY-NC-SA)

Weaknesses

Weaknesses: Language

Inconsistent APIin_array($needle, $haystack)

strpos($haystack, $needle)

Unicode support*

Errors and Exceptions*

Extensions are hit-or-miss

Weaknesses: Scaling/Speed

Overhead with single-request scopeMove session storage to memory

In-memory cache (Memcached/APC)

Database

Clustered software (Zend Platform, etc.)

Bytecode caching (APC, Xcache, etc.)

Weaknesses: Thread Safety

Linux/UnixFastCGI

Non-thread safe

WindowsMost Windows libraries PHP uses are thread-safe

Recommends FastCGI, anyway

PHP Personalities

Andrei Zmievski(@a)PHP Core, PHP-GTK,Smarty

Wez Furlong(@wezfurlong)PHP Core, PDO, PECL extensions

Sebastian Bergmann(@s_bergmann)PHPUnit

Derick Rethans(@derickr)PECL extensions, Xdebug

Ilia Alshanetsky(@iliaa)PHP Core

Matthew Weier O'Phinney(@weierophinney)Zend Framework

Where do you go?

http://php.net

http://devzone.zend.com

http://www.planet-php.net

http://www.phparch.com

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Muokkaa otsikon tekstimuotoa napsauttamalla

Muokkaa jsennyksen tekstimuotoa napsauttamallaToinen jsennystasoKolmas jsennystasoNeljs jsennystasoViides jsennystasoKuudes jsennystasoSeitsems jsennystasoKahdeksas jsennystasoYhdekss jsennystaso