Re: Closures and __FUNCTION__

In addendum I'd like to correct the syntax that I had someone in IRC test. Apparently it works as such: $foo = NULL; $foo = function($foo) use (&$foo) { ... } Still rather hackish, but better than globals I suppose? Thanks, Justin Martin Justin Martin wrote: > Hi Peter, > > If I recall correctly, you can use the 'use' keyword. > > $factorial = function($foo) use ($factorial) { > $factorial($foo); > } > > $factorial('Hello World!'); > > I'm still having issues compiling 5.3 on my system, so I haven't tested > this. > > Thanks, > Justin Martin > > Peter Danenberg wrote: >> The original anonymous functions patch[1] contained support for >> __FUNCTION__ as a recursion mechanism in closures, such that I should >> be able to do something like this: >> >> $factorial = function($n) { >> if ($n == 1) >> return 1; >> else >> return $n * call_user_func(__FUNCTION__, $n - 1); >> >> }; >> >> print $factorial(3); // => 6 >> >> >> It fails with a warning, though: >> >> Warning: call_user_func() expects parameter 1 to be a valid >> callback, function '{closure}' not found or invalid function name >> >> Is there another recursion mechanism for closures besides something >> like the $GLOBALS['factorial'] hack? >> >> Footnotes: >> [1] >> http://marc.info/?l=php-internals&m=119995982228453&w=2 >>