Question

I have 2 classes, main and extended. I need to use main vars in extended class.

<?php class Main {   public $vars = array(); }  $main = new Main;  $main->vars['key'] = 'value';  class Extended extends Main { }  $other = new Extended;  var_dump($other->vars);  ?> 

Who I can do it?

No valid for example:

<?php class Extended extends Main {   function __construct ($main) {     foreach ($main as $k => $v) {       $this->$k = $v;     }   } } ?> 

I need some solution more transparent and efficient 🙂

Answer 1

EDIT: This can be solved much better with Inversion of Control (IoC) and Dependency Injection (DI). If you use your own framework or one without Dependency Injection Container try League/Container

Answer below left as history of foolish answers.

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The correct way I figure.

<?php class Config {     protected $_vars = array();      protected static $_instance;      private function __construct() {}      public static function getInstance()     {         if (!isset(self::$_instance)) {             self::$_instance = new self();         }         return self::$_instance;     }      public function &__get($name) {         return $this->_vars[$name];     }      public function __set ($name, $value) {         $this->_vars[$name] = $value;     } }  $config = Config::getInstance(); $config->db = array('localhost', 'root', ''); $config->templates = array(     'main' => 'main',     'news' => 'news_list' );  class DB {     public $db;      public function __construct($db)     {         $this->db = $db;     }      public function connect()     {         mysql_connect($this->db[0], $this->db[1], $this->db[2]);     } }  $config = Config::getInstance(); $db = new DB($config->db); $db->connect();  class Templates {     public $templates;      public function __construct($templates)     {         $this->templates = $templates;     }      public function load ($where) {         return $this->templates[$where];     } }  $config = Config::getInstance(); $templates = new Templates($config->templates); echo $templates->load('main') . '\n';