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
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