note 86260 added to language.oop5.decon

Constructor Simplicity If your class DOES CONTAIN instance members (variables) that need to be set, then your class needs to be initialized... and you should use __construct() to do that. <?php class MyClassA { public $data1, $data2; public function __construct($mcd1, $mcd2) { $this->data1 = $mcd1; // INITIALIZE $data1 $this->data2 = $mcd2; // INITIALIZE $data2 } } $obj1 = new MyClassA("Hello", "World!"); // INSTANTIATE MyClassA $d1 = $obj1->data1; $d2 = $obj1->data2; ?> If your class DOES NOT CONTAIN instance members or you DO NOT want to instantiate it, then there is no reason to initialize it or use __construct(). <?php class MyClassB { const DATA1 = "Hello"; public static $data2 = "World!"; } $obj1 = new MyClassB(); // INSTANTIATE MyClassB - NO error. $d1 = $obj1::DATA1; // ERROR $d2 = $obj1::data2; // ERROR $d1 = MyClassB::DATA1; // ok $d2 = MyClassB::$data2; // ok ?> The fact that $obj1 is useless and cannot be used as a reference, is further evidence that MyClassB objects should not be instantiated. NOTICE that MyClassB does not use private members or functions to make it behave that way. Rather, it is the collective nature of all the class members + what ISN'T there. ---- Server IP: 69.147.83.197 Probable Submitter: 66.53.213.181 ---- Manual Page -- http://www.php.net/manual/en/language.oop5.decon.php Edit -- https://master.php.net/note/edit/86260 Del: integrated -- https://master.php.net/note/delete/86260/integrated Del: useless -- https://master.php.net/note/delete/86260/useless Del: bad code -- https://master.php.net/note/delete/86260/bad+code Del: spam -- https://master.php.net/note/delete/86260/spam Del: non-english -- https://master.php.net/note/delete/86260/non-english Del: in docs -- https://master.php.net/note/delete/86260/in+docs Del: other reasons-- https://master.php.net/note/delete/86260 Reject -- https://master.php.net/note/reject/86260 Search -- https://master.php.net/manage/user-notes.php