PHP 5.3 OVERVIEW 6/8/2010 - Dallas PHP Jake Smith 

PERFORMANCE • Over 140 bug fixes • 40%+ improvement with PHP on Windows • 5% - 15% overall performance improvement • MD5 roughly 15% faster • Constants move to read-only memory • Drupal 20% faster, Wordpress 15% faster 

ADDITIONS • New error_reporting E_DEPRECATED • Garbage collection • MySQLnd (Native Driver) • No longer uses libmysql • No PDO support (currently) • MySQL version 4.1+ 

BACKWARDS COMPATIBILITY • EREG Family is now E_DEPRECATED • Use the Pearl Compatible (PCRE) • __toString does not accept arguments/parameters • Magic methods must be public and can not be static • __call is now invoked on access to private/protected methods • Classes can not be named Namespace or Closure SOURCES: http://us2.php.net/manual/en/migration53.incompatible.php 

MAGIC METHODS IN 5.3 \n"; } private function __get($method) { } private function __set($method, $value) { } private function getElements() { echo "Get Elements
\n"; } } $bc = new Backwards(); $bc->getElements(); 

CHANGES IN PHP.INI • INI Variables • Per Folder/Per Site ini settings • User specified ini files 

.INI VARIABLES error_dev = E_ALL error_prod = E_NONE [HOST=dev.mydomain.com] error_reporting = ${error_dev} [HOST=mydomain.com] error_reporting = ${error_prod} [PATH=/var/www/vhosts/myotherdomain.com] error_reporting = ${error_prod} # User Defined ini. Place in web root. Set to blank to disable user_ini.filename = .user.ini user_ini.cache_ttl = 300 

SLOW ADOPTION • Open Source projects were initially not compatible with PHP 5.3 • Currently most major Open Source software (Wordpress, Drupal, Joomla and Magento) work in PHP 5.3 • Key plugins are lacking behind 

PECL ADDITIONS • PECL Added • FileInfo, Intl, Phar, MySQLnd, SQLite3 • PECL Removed • ncurses, FPDF, dbase, fbsql, ming SOURCES: http://php.net/releases/5_3_0.php 

SPL ADDITIONS • GlobIterator - Iterator utilizing glob, look up glob function • SplFixedArray - Fixed size/dimension array • SplQueue • SplHeap • SplStack SOURCES: http://matthewturland.com/2010/05/20/new-spl-features-in-php-5-3/ 

NEW CONSTANTS • __DIR__ • No more dirname(__FILE__); • __NAMESPACE__ • Current namespace 

NEW OPERATORS • Ternary Operator ?: • Goto • NOWDOC 

TERNARY OPERATOR

GOTO SOURCES: http://xkcd.com/292/ 

GOTO EXAMPLE

NOWDOC VS. HEREDOC • NOWDOC works just like HEREDOC, except it does not evaluate PHP variables

DATE/TIME OBJECT ADDITIONS • New functions/methods added to Date/Time Object • date_add, date_sub and date_diff SOURCES: http://www.php.net/manual/en/class.datetime.php add(new DateInterval('P10D')); echo $date->format('Y-m-d') . "\n"; // OR $date = date_create('200-01-01'); date_add($date, date_interval_create_from_date_string('10 days')); echo date_format($date, 'Y-m-d'); 

NEW METHODS • Functors/__invoke • Dynamic Static Method • __callStatic • get_called_class() 

__INVOKE

DYNAMIC STATIC METHOD $method($criteria, $order, $limit, $offset); } } 

DYNAMIC STATIC METHOD

__CALLSTATIC • __callStatic works exactly like __call, except it’s a static method • Acts as a catch all for all undefined methods (get or set)

GET_CLASS_CALLED • get_called_class returns the class name that called on the parent method 

GET_CLASS_CALLED 

LATE STATIC BINDING • This feature was named "late static bindings" with an internal perspective in mind. "Late binding" comes from the fact that static:: will no longer be resolved using the class where the method is defined but it will rather be computed using runtime information. SOURCES: http://us.php.net/lsb 

LSB BEFORE PHP 5.3

LSB PHP 5.3.X • static keyword to save the day!

LAMBDA IN PHP 5.3 • Anonymous functions, also known as closures, allow the creation of functions which have no specified name. They are most useful as the value of callback parameters, but they have many other uses. • Good function examples: array_map() and array_walk()

LAMBDA EXAMPLE (JQUERY) $('.button').click(function() { $(this).hide(); }); 

CLOSURE '; echo $rowColor() . '
'; echo $rowColor() . '
'; echo $rowColor() . '
'; echo $rowColor() . '
'; echo $rowColor() . '
'; 

NAMESPACES • Before PHP 5.3 • PHP didn’t have namespaces, so we created a standard: “Zend_Auth_Adapter_DbTable” • PEAR naming convention • Easier for autoloaders 

DEFINING A NAMESPACE

“USE” A NAMESPACE formatPhone('123-456-7890')) { echo 'ITS TRUE'; } 

DEFINING MULTIPLE NAMESPACES

WHAT IS GLOBAL SCOPE? • Global Scope is your “root level” outside of the namespace getConnection(); 

ORM EXAMPLE 0) { list($order, $limit, $offset) = $params; } $method = $matches[1]; return static::$method($criteria, $order, $limit, $offset); } public static function find($criteria = array(), $order = null, $limit = null, $offset = 0) { echo static::TABLE_NAME; echo $order . ' ' . $limit . ' ' . $offset; } } } namespace App\Models { class Posts extends \App\Model { const TABLE_NAME = 'posts'; } } 

QUESTIONS? 

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