Re: [PHP4BETA] References to functions inside a class?

On Mon, 5 Jun 2000 10:41:57 +0300 (IDT), Stanislav Malyshev <[email protected]> wrote:
>
> J>> 	{
> J>> 	  if($limit)
> J>> 		$this->query() = &$this->query_l();
> J>> 	  else
> J>> 		$this->query() = &$this->query_u();
> J>> 	}
> J>> }
> J>> ?>
> J>> 
> J>> PS: I'll even accept a pointer to discussion saying that it CAN'T be
> J>> done...I know someone on this list was discussiing this at one pont, but I
> J>> don't recall the discussion.
>
> You can't have reference to function. However, you can do the following:
>
> $this->call_query = "query_l";
>
> $this->$call_query($params)

shouldnt this be sematically equiv to $this->$this->call_query($params)...
 
>
> i.e., call by variable name.
>
>

another variation on the theme

class Class{
   var which_query_func;

   function Class($limit){
         if($limit){
             $this->which_query_func="query_l";
         }
         else{
              $this->which_query_func="query_u";
         }
   }

   function query($arg){
          $query=$this->which_query_func;
          return $this->$query($arg);
   }

   function query_l($arg){
           // limit query
   }

   function query_u($arg){
           // no limit query
   }
}

Now $inst->query() will result in the correct function being called.

Regards,

Alan van den Bosch
Sanguis Pty Ltd

/* All generalizations are false. */