[PHP] declaring variables in class definitions

[sam1600]

Hello,

class a {
   var $somevar;
   function b(){
     if (!isset($this->somevar))
          echo "Not set<br>";
     if (empty($this->somevar))
         echo "empty<br>";
      }
   }

$d = new a;
$d->b();

The above returns:
Not set
empty
 
What in the world is reason for declaring the following in the class?:
var $somevar;

I see no reason, and no differences if I don't declare: var $somevar;

Maybe a better question is what will break if I do not declare
my vars in my class definition?

Thanks,
Sam


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