I’m fairly excited because as of only a week or so ago I found the closures rfc, and not only did I find that the rfc has a working patch, apparently it’s already in PHP 5.3.
You see, apparently it’s not good enough that we get name spaces and late static binding, oh no, we get closures too!
I downloaded the Win32 snapshot from PHP snapshots page and indeed, closure support was included.
According to the rfc, one must manually define external variables used within a function, however in my own tests you can still use the
global keyword. The difference between the two is the
use statement preserves the value of
$global at creation and the
global keyword would work as you would expect it to with a normal function. For example:
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You can, as well, return references with a closure by putting the & between the function keyword and the parenthesis.
Just one of many shiny fancy things to look forward to in PHP 5.3.
I should mention to the people that trashed my examples on reddit, I’m sorry for assuming you knew what closures were and the the real world uses of them. I will try to refrain from giving a concise example of how a new language feature interacts with existing features and conventions, especially in PHP where things are a bit disorganized.