note 86074 added to language.oop5.typehinting

TYPE-HINTING and VISIBILITY Type-hinting is just one more small piece of PHP that protects our objects when visibility cannot. <?php class Point { public $x, $y; public function __construct($xVal = 0, $yVal = 0) { $this->x = $xVal; $this->y = $yVal; } } class Polyline { protected $points = array(); public function addPoint(Point $p) { // the line we're interested in... $this->points[] = $p; } } $point1 = new Point(15, 12); $polyline = new Polyline(); $polyline->addPoint($point1); $polyline->addPoint(new Point(55, 22)); $polyline->addPoint(new Point(33, 31)); $polyline->addPoint(new stdClass()); // PHP will throw an error for us! ?> Since our Polyline::addPoint() function has to be public, any outside code can try to pass anything. But, when type-hinting is declared, PHP throws an error when phoney data tries to sneak by. ---- Server IP: 69.147.83.197 Probable Submitter: 67.150.1.108 ---- Manual Page -- http://www.php.net/manual/en/language.oop5.typehinting.php Edit -- https://master.php.net/note/edit/86074 Del: integrated -- https://master.php.net/note/delete/86074/integrated Del: useless -- https://master.php.net/note/delete/86074/useless Del: bad code -- https://master.php.net/note/delete/86074/bad+code Del: spam -- https://master.php.net/note/delete/86074/spam Del: non-english -- https://master.php.net/note/delete/86074/non-english Del: in docs -- https://master.php.net/note/delete/86074/in+docs Del: other reasons-- https://master.php.net/note/delete/86074 Reject -- https://master.php.net/note/reject/86074 Search -- https://master.php.net/manage/user-notes.php