class Registry { /** * Returns the connection */ public static function getConnection() { return new Connection(array("host" => "localhost", "username" => "root", "password" => "secret", "dbname" => "invo")); } } class SomeComponent { protected $_connection; /** * Sets the connection externally */ public function setConnection($connection) { $this->_connection = $connection; } public function someDbTask() { $connection = $this->_connection; // ... } } $some = new SomeComponent(); //Pass the connection defined in the registry $some->setConnection(Registry::getConnection()); $some->someDbTask();
<?php //Create the dependencies or retrieve them from the registry $connection = new Connection(); $session = new Session(); $fileSystem = new FileSystem(); $filter = new Filter(); $selector = new Selector(); //Pass them as constructor parameters $some = new SomeComponent($connection, $session, $fileSystem, $filter, $selector); // ... or using setters $some->setConnection($connection); $some->setSession($session); $some->setFileSystem($fileSystem); $some->setFilter($filter); $some->setSelector($selector);