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Reply-To: zeev@zend.com
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Date: Mon, 19 May 2003 17:47:20 +0300
To: Sterling Hughes <sterling@bumblebury.com>
Cc: internals@lists.php.net
In-Reply-To: <1053350193.790.91.camel@hasele>
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Subject: Re: [PHP-DEV] Code References
From: zeev@zend.com (Zeev Suraski)
References: <1053350193.790.91.camel@hasele>

Anything that create_function() doesn't do?

Zeev

At 16:16 19/05/2003, Sterling Hughes wrote:
>Hi,
>
>I figure I'll just throw this out into the wilderness, I want closures
>and function pointers in PHP.  In other words I want the ability to do:
>
>$var = function ($a, $b) {
>     return $a + $b;
>};
>
>And then $var can contain a code reference to the anonymous function.
>Having code references is an infinitely useful feature in my experience,
>and I know other people have some really cool uses of closures for
>lightweight templating (with mod_perl.) [1]
>
>I'd also like function pointers, which are optimized callbacks of some
>sort, so you can go:
>
>function my_compare($a, $b) {
>    if ($a > $b) return 1;
>    if ($a < $b) return -1;
>    return 0;
>}
>
>sort($ar, <my_compare>);
>
>And compare doesn't need to be resolved at runtime, but rather can be a
>compile time feature.
>
>-Sterling
>
>[1] I say code references on purpose.  This doesn't need to mean full
>fledged closures, which are probably overkill (although, they would be
>nice too ;)
>
>--
>"That stuff's easy compared to installing Horde"
>     - Alan Knowles, In response to my applause for creating a LALR
>     parser for PHP.
>
>
>--
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