What’s New In PHP 5.3? PHP UK February 2009 Scott MacVicar Friday, 27 February 2009
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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
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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
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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
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