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Date: Wed, 04 Mar 2009 14:07:52 +0200
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Subject: Re: [PHP-DEV] Are there plans to allow anonymous functions as callbacks?
From: ionut.g.stan@gmail.com ("Ionut G. Stan")

You need PHP 5.3 for that. Here's the RFC:

http://wiki.php.net/rfc/closures


On 3/4/2009 13:33, Richard Quadling wrote:
> Hi.
>
> Quite a simple question (assuming I've got the terminology correct).
>
> Are there any plans to allow code like this (amended example taken
> from the array_map() documentation) ...
>
> <?php
> $a = array(1, 2, 3, 4, 5);
> $b = array_map(function($n){return($n * $n * $n)}, $a);
> print_r($b);
>
> For me, this is cleaner than having a use-once, namespace-polluting function.
>
> Currently, this is producing a parse error.
>
>
> A real alternative though would be to allow nested functions...
>
> <?php
> function cube_array($a) {
>    function cube($n) {
>      return($n * $n * $n);
>    }
>    return array_map("cube", $a);
> }
> $a = array(1, 2, 3, 4, 5);
> $b = cube_array($a);
> print_r($b);
>
> Ideally, cube() would not be visible outside of cube_array(). Scoped functions.
>
> Regards,
>
> Richard Quadling.

-- 
Ionut G. Stan
I'm under construction  |  http://igstan.blogspot.com/