Re: [RFC] Allow "use( $longname as $alias)" syntax for closures declaration

On Fri, Apr 13, 2012 at 12:21 AM, Nikita Popov <nikita.ppv@googlemail.com> wrote: > On Thu, Apr 12, 2012 at 6:06 PM, Laruence <laruence@php.net> wrote: >> On Fri, Apr 13, 2012 at 12:04 AM, Dmitri Snytkine >> <dsnytkine@ultralogistics.com> wrote: >>> I'm curious to know the benefits of this. >>> Care to explain why or when this would be useful? >> >> From what LawnGnome said: >> >>  " I think it's a nice bit of syntactic sugar, personally. It's not >> something you'd ever _need_, but it's a neat way of getting your >> variable names in order within the inner scope if your enclosing scope >> is a bit messy. Plus, it's consistent with the X as Y syntax that's >> already in foreach and traits, which is a bonus." > > It would be nice to see a few real-life scenarios where this is > useful. Right now I can't think of situations where you'd want to > change the variable name between the outer scope and the closure > scope. Wouldn't that just be confusion for the programmer if the same > variable would go under two different names? Now you can not use $this class foo { public function bar() { return function() use ($this) { // PHP Fatal error: Cannot use $this as lexical variable } } } so you have to write: class foo { public function bar() { $obj = $this; return function() use ($obj) { } } } thanks > > Nikita -- Laruence  Xinchen Hui http://www.laruence.com/