Re: [RFC] unset(): return bool if the variable has existed
On 7 March 2013 09:45, Sebastian Krebs <[email protected]> wrote:
>
> So I guess this is the only useful behaviour. However, I have no idea, what
> this information should tell me. If I call unset() then I want to ensure,
> that the variable is not set anymore, but for what reason I should need to
> know, whether it was set before, or not?
>
I think I actually had an use case with proxies, where I wanted to know if
a property was set or not. That's useful to reset the proxy state
(basically to intercept property access) and differentiate null properties
vs non existing properties:
class Blah extends Blubb
{
protected $prop;
public function __construct() { unset($this->prop); }
public function init() { $this->prop = 'stuff'; }
public function reset() { return unset($this->prop); } // we now
know if init was called
}
This *could* be useful if I want to keep track of the state of a proxy, but
it's just an additional property to keep track of manually on the other
side. The additional property is also more explicit and easier to track.
Yes, it needs a better use case.
Marco Pivetta
http://twitter.com/Ocramius
http://ocramius.github.com/
Thread (21 messages)