2 Comments on “What is the output of the following code?”

1. Max says:

   February 21, 2017 at 7:56 am

   code is

   class A
   {
   public $a = 1;
   public function __construct($a) {
   $this->a = $a;
   }
   public function mul() {
   return function($x) {
   return $this->a*$x;
   };
   }
   }

   $a = new A(2);
   $a->mul = function($x) { return $x*$x; };
   $m = $a->mul();
   echo $m(3);

   
   
   
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2. Max says:

   February 21, 2017 at 8:01 am

   Answer C;
   line $a->mul = function($x) { return $x*$x; }; is not executed;
   Actual method from class definition is performed

   
   
   
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