How to don't pass any value to methods in PHP -

i have simple class 1 method accepts parameter.

class articlecontroller {     public function show(article $article)     {         // logic here     } } 

and want use in way:

$articlecontroller = new articlecontroller; $articlecontroller->show(); 

as see didnt pass value method "show". since php7 out , forces pass value(dependency), there way dont pass value method , still can use without error ? php version = 7.1.8

the behaviour described in question not related php 7 in way. works same on php 5 well.

you can set default value argument $article (making optional way) if set null have make sure handle value in method:

class articlecontroller {     public function show(article $article = null)     {         if (isset($article)) {             // logic here, $article object         } else {             // $article null, cannot use object         }     } } 

when call show() without passing value, argument $article initialized default value (null in example).

$controller = new articlecontroller(); $news       = new article();  $controller->show($news); // inside show() method, $article set $news  $controller->show(); // no argument passed, $article null inside show()