php 5.3 overview
DESCRIPTION
TRANSCRIPT
PHP 5.3 OVERVIEW6/8/2010 - 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 ClosureSOURCES: http://us2.php.net/manual/en/migration53.incompatible.php
MAGIC METHODS IN 5.3<?php
class Backwards { public function __call($method, $value) { echo "Call Magic Method<br />\n"; } private function __get($method) { } private function __set($method, $value) { } private function getElements() { echo "Get Elements<br />\n"; }}
$bc = new Backwards();
$bc->getElements();
CHANGES IN PHP.INI
• INI Variables
• Per Folder/Per Site ini settings
• User specified ini files
.INI VARIABLESerror_dev = E_ALLerror_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 = ${error_prod}
# User Defined ini. Place in web root. Set to blank to disableuser_ini.filename = .user.ini
user_ini.cache_ttl = 300
SLOW ADOPTION
• Open Source projects were initially not compatible with PHP 5.3
• Currently most major Open Source software (Wordpress, Drupal, Joomla and Magento) work in PHP 5.3
• Key plugins are lacking behind
PECL ADDITIONS
• PECL Added
• FileInfo, Intl, Phar, MySQLnd, SQLite3
• PECL Removed
• ncurses, FPDF, dbase, fbsql, ming
SOURCES: http://php.net/releases/5_3_0.php
SPL ADDITIONS
• GlobIterator - Iterator utilizing glob, look up glob function
• SplFixedArray - Fixed size/dimension array
• SplQueue
• SplHeap
• SplStack
SOURCES: http://matthewturland.com/2010/05/20/new-spl-features-in-php-5-3/
NEW CONSTANTS
• __DIR__
• No more dirname(__FILE__);
• __NAMESPACE__
• Current namespace
NEW OPERATORS
• Ternary Operator ?:
• Goto
• NOWDOC
TERNARY OPERATOR
<?php// Before PHP 5.3$action = $_POST['action'] ? $_POST['action'] : 'Default Action';
// Now in PHP 5.3 (less time)$action = $_POST['action'] ?: 'Default Action';
GOTO EXAMPLE
<?phpfor($i=0,$j=50; $i<100; $i++) { while($j--) { if($j==17) goto end; } }
echo "i = $i";
end: // End echo 'j hit 17';
SOURCES: http://php.net/manual/en/control-structures.goto.php
NOWDOC VS. HEREDOC
• NOWDOC works just like HEREDOC, except it does not evaluate PHP variables
<?php$myVar = 'testing';// OUTPUT: Here is my text testing$longString = <<<HEREDOCHere is my text $myVarHEREDOC;
// OUTPUT: Here is my text $myVar$longString = <<<'NOWDOC'Here is my text $myVar'NOWDOC';
DATE/TIME OBJECT ADDITIONS
• New functions/methods added to Date/Time Object
• date_add, date_sub and date_diff
SOURCES: http://www.php.net/manual/en/class.datetime.php
<?php$date = new DateTime('2000-01-01');$date->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($date, 'Y-m-d');
NEW METHODS
• Functors/__invoke
• Dynamic Static Method
• __callStatic
• get_called_class()
__INVOKE
<?phpclass Functor { public function __invoke($param = null) { return 'Hello Param: ' . $param; }}
$func = new Functor();echo $func('PHP 5.3'); // Hello Param: PHP 5.3
DYNAMIC STATIC METHOD
<?phpabstract class Model{ const TABLE_NAME = ''; public static function __call($method, $params) { // Run logic return $this->$method($criteria, $order, $limit, $offset); }}
DYNAMIC STATIC METHOD
<?phpabstract class Model{ const TABLE_NAME = ''; public static function __callStatic($method, $params) { // Run logic return static::$method($criteria, $order, $limit, $offset); }}
__CALLSTATIC
• __callStatic works exactly like __call, except it’s a static method
• Acts as a catch all for all undefined methods (get or set)
<?phpabstract class Model{ const TABLE_NAME = ''; public static function __callStatic($method, $params) { // Run logic return static::$method($criteria, $order, $limit, $offset); }}
GET_CLASS_CALLED
• get_called_class returns the class name that called on the parent method
GET_CLASS_CALLED<?php namespace App { abstract class Model { public static function __callStatic($method, $params) { // Search Logic $method = $matches[1]; return static::$method($criteria, $order, $limit, $offset); } public static function find($criteria = array(), $order = null, $limit = null, $offset = 0) { $tableName = strtolower(get_class_called()); // get_class_called will return Post } } } namespace App\Models { class Post extends \App\Model {} } // Returns all the posts that contain Dallas PHP in the title $posts = Post::findByTitle('Dallas PHP');?>
LATE STATIC BINDING
• This feature was named "late static bindings" with an internal perspective in mind. "Late binding" comes from the fact that static:: will no longer be resolved using the class where the method is defined but it will rather be computed using runtime information.
SOURCES: http://us.php.net/lsb
LSB BEFORE PHP 5.3<?php
class Model { const TABLE_NAME = ''; public static function getTable() { return self::TABLE_NAME; }}
class Author extends Model { const TABLE_NAME = 'Author';}
class Post extends Model { const TABLE_NAME = 'Post'}
// sadly you get nothingecho Post::TABLE_NAME;
LSB PHP 5.3.X
• static keyword to save the day!<?php
class Model { const TABLE_NAME = ''; public static function getTable() { return static::TABLE_NAME; }}
class Author extends Model { const TABLE_NAME = 'Author';}
class Post extends Model { const TABLE_NAME = 'Post'}
// sadly you get nothingecho Post::TABLE_NAME;
LAMBDA IN PHP 5.3
• Anonymous functions, also known as closures, allow the creation of functions which have no specified name. They are most useful as the value of callback parameters, but they have many other uses.
• Good function examples: array_map() and array_walk()
<?php$string = 'Testing';$array = array('hello', 'world', 'trying', 'PHP 5.3');$return = array_walk($array, function($v,$k) { echo ucwords($v);});
LAMBDA EXAMPLE (JQUERY)
$('.button').click(function() { $(this).hide();});
CLOSURE<?php// Cycle factory: takes a series of arguments// for the closure to cycle over.function getRowColor (array $colors) { $i = 0; $max = count($colors); $colors = array_values($colors); $color = function() use (&$i, $max, $colors) { $color = $colors[$i]; $i = ($i + 1) % $max; return $color; }; return $color;}
$rowColor = getRowColor(array('#FFF', '#F00', '#000'));echo $rowColor() . '<br />';echo $rowColor() . '<br />';echo $rowColor() . '<br />';echo $rowColor() . '<br />';echo $rowColor() . '<br />';echo $rowColor() . '<br />';
NAMESPACES
• Before PHP 5.3
• PHP didn’t have namespaces, so we created a standard: “Zend_Auth_Adapter_DbTable”
• PEAR naming convention
• Easier for autoloaders
DEFINING A NAMESPACE
<?php namespace MyApp\Util; class String { public function formatPhone($phone) { // Regex phone number return true; } }
“USE” A NAMESPACE
<?phpuse MyApp\Util\String as String;
$str = new String(); if ($str->formatPhone('123-456-7890')) { echo 'ITS TRUE'; }
DEFINING MULTIPLE NAMESPACES
<?phpuse Framework\Controller as BaseControlleruse Framework\Model as BaseModelnamespace MyApp\Controllers;
class UsersController extends BaseController{ }
namespace MyApp\UserModel;class User extends BaseModel{ }
<?phpuse Framework\Controller as BaseControlleruse Framework\Model as BaseModelnamespace MyApp\Controllers {
class UsersController extends BaseController{ }
}
namespace MyApp\UserModel {class User extends BaseModel{ }
}
One Way Preferred Way!
WHAT IS GLOBAL SCOPE?
• Global Scope is your “root level” outside of the namespace
<?phpnamespace Framework;
class DB{ public function getConnection() { try { $dbh = new \PDO('mysql:dbname=testdb;host=localhost', 'root', 'pass'); } catch (\Exception $e) { echo 'Default Exception'; } }}
$db = new DB();$db = $db->getConnection();
ORM EXAMPLE<?php namespace App { abstract class Model { const TABLE_NAME = ''; public static function __callStatic($method, $params) { if (!preg_match('/^(find|findFirst|count)By(\w+)$/', $method, $matches)) { throw new \Exception("Call to undefined method {$method}"); } echo preg_replace('/([a-z0-9])([A-Z])/', '$1_$2', $matches[2]); $criteriaKeys = explode('_And_', preg_replace('/([a-z0-9])([A-Z])/', '$1_$2', $matches[2])); print_r($matches); $criteriaKeys = array_map('strtolower', $criteriaKeys); $criteriaValues = array_slice($params, 0, count($criteriaKeys)); $criteria = array_combine($criteriaKeys, $criteriaValues); $params = array_slice($params, count($criteriaKeys)); if (count($params) > 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?
THANKS FOR LISTENINGContact Information[t]: @jakefolio[e]: [email protected][w]: http://www.jakefolio.com