Re: [RFC] unset(): return bool if the variable has existed

On 7 March 2013 09:45, Sebastian Krebs <krebs.seb@gmail.com> 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/