note 102142 added to language.oop5.inheritance

PHP supports single class inheritance. My bare idea on accessing protected methods with power of abstracts and sort of "multi-class inheritance SIMULATION": <?php error_reporting(E_ALL); abstract class Base { abstract protected function __construct (); abstract protected function hello_left (); abstract protected function hello_right (); } abstract class NotImplemented_Left extends Base { protected function hello_right () { echo 'well, wont see that'; }} abstract class NotImplemented_Right extends Base { protected function hello_left () { echo 'well, wont see that'; }} class Left extends NotImplemented_Left { protected function __construct () { # limited visibility, no access from "outside" echo __CLASS__.'::protected __construct'. "\n"; } protected function hello_left () { # limited visibility, no access from "outside" echo 'protected hello_left in ' . __CLASS__ . "\n"; }} class Right extends NotImplemented_Right { protected function __construct () { # limited visibility, no access from "outside" echo __CLASS__.'::protected __construct'. "\n"; } protected function hello_right () { # limited visibility, no access from "outside" echo 'protected hello_right in ' . __CLASS__ . "\n"; } protected function hello_left () { echo "wont see that, and easy to get rid of it from here\n"; }} class Center extends Base { private $left; private $right; public function __construct () { echo 'welcome in ' . __CLASS__ . "\n"; echo 'Center::'; $this->left = new Left; echo 'Center::'; $this->right = new Right; echo " oh and\n"; $this->hello_left(); $this->hello_right(); } public function hello_left () { # calling class Left echo __CLASS__.'::'; $this->left->hello_left(); } public function hello_right () { # calling class Right echo __CLASS__.'::'; $this->right->hello_right(); } } $c = new Center; ?> Produces: welcome in Center Center::Left::protected __construct Center::Right::protected __construct oh and Center::protected hello_left in Left Center::protected hello_right in Right ---- Server IP: 69.147.83.197 Probable Submitter: 76.100.12.47 ---- Manual Page -- http://www.php.net/manual/en/language.oop5.inheritance.php Edit -- https://master.php.net/note/edit/102142 Del: integrated -- https://master.php.net/note/delete/102142/integrated Del: useless -- https://master.php.net/note/delete/102142/useless Del: bad code -- https://master.php.net/note/delete/102142/bad+code Del: spam -- https://master.php.net/note/delete/102142/spam Del: non-english -- https://master.php.net/note/delete/102142/non-english Del: in docs -- https://master.php.net/note/delete/102142/in+docs Del: other reasons-- https://master.php.net/note/delete/102142 Reject -- https://master.php.net/note/reject/102142 Search -- https://master.php.net/manage/user-notes.php