What’s New InPHP 5.3?

PHP UK February 2009Scott MacVicar

Friday, 27 February 2009

Feature Release

All PHP 5 code should still works

Backports everything except Unicode from 6

Bug fixes from PHP 5.2

Friday, 27 February 2009

Namespaces

Mostly done at compile time

Saves extra long prefixes (Yay framework developers)

Zend_Search_Lucene_Analysis_Analyzer_

Reduces class name conflicts

Multiple namespaces per file

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Namespace Usage

Can Contain:

classes

functions

constants with the same name

Defined by statement namespace <x>;

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\ as separatorFriday, 27 February 2009

You used \?!? WTF?

Symbol Use Symbol Use

% Modulus + Plus

^ Xor - Minus

* Multi / Division

~ Not \ ???

| Or : Else

& And ` Exec

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Namespaces example

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Namespaces example

Friday, 27 February 2009

Namespaces example

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Other Namespace Things

__NAMESPACE__

global scope \

__autoload(), get_class() and get_parent_class() now return a full qualified classname

Resolves internally then externally

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Namespace Oddities

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Late Static Binding

Static references use to be resolved at compile time

Static constants would correspond to where they were defined

static:: is now resolved at runtime

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LSB Example 1

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LSB Example 2

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Lambda Functions and Closures

Functions on the fly

Ideal for things that require a callback

create_function() is runtime based

__invoke method for Classes

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Example - 1

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Example - 2

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Garbage Collector

GSoC 2007 Project

Looks for cyclic references

Increases overall memory usage slightly

Good for long running scripts

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Cyclic Reference

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Garbage Collector Usage

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Dynamic Static Calls

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Improved ini handling

Change PHP settings similarly to .htaccess when using FCGI

Per-directory ini settings

INI constants / variables

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INI Example

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__callStatic

__callStatic($name, $arguments)

Identical to __call but for static methods

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__callStatic example

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Limited goto

goto is a bad idea™

PHP provides goto <label>

Can only jump out of a structure

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goto example

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?: Operator

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SPL ImprovementsDualIterator

RecursiveTreeIterator

SplArrayReference

DirectoryIterator implements ArrayAccess

SplStack

SplQueue

SplHeap

SplFixedArray

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NOWDOCLike heredoc but without evaluation

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enchant

Speel Cheking

Wraps around existing libraries

Supports platform dictionaries

HunSpell (Firefox, OpenOffice)

AppleSpell (OS X default)

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fileinfo

Guess content type and encoding

Looks for magic byte sequences

Previously required external library

Provides mime_content_type() support

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intl

Wrapper around IBM’s ICU library

Provides collation, normalization, datetime and number / currency formatting

IDN Support

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MySQLnd

Developed by MySQL

Replaces libmysql and is bundled

Faster and uses less memory

Statistics

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phar

Similar to Java’s JAR

PHP 5.3 can open and read phars

Can mount internal phar directoriesPhar::mount(“cache/”, “/tmp/cache”);

Works with OPCode caches

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Phar Example

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Using Phar

Make a stub file

Build archive

Rejoice

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SQLite3

OO API

Replaces old SQLite class

Bundles full text search

SQLite 3.6.11

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Extensions removeddbase

fbsql

fdf

ncurses

ming

pspell

sybase

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New Constants__DIR__

PHP_MAJOR_VERSION

PHP_MINOR_VERSION

PHP_RELEASE_VERSION

PHP_VERSION_ID

PHP_DEBUG

PHP_MAXPATHLEN

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Improved Performance

New scanner based on re2c

md5() now faster

require_once / include_once faster on second usage

Improved memory usage due to constants being marked as read only

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Improved Performance

Improved engine stack implementation

Removed direct executor recursion

Use fastcall calling convention on x86

Various opcode optimisations

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MiscellaneousOver 180 bug fixes

PCRE upgrade

SQLite upgrade

Stream improvements

OpenSSL improvements

Make JSON suck less

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Beers for Bugs

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Questions?

Go download and test!

http://qa.php.net/

http://windows.php.net/downloads.php

Slides

http://talks.macvicar.net

Friday, 27 February 2009