k4st

function Y(&$le) {	return closure(get_defined_vars(), '$f')->scope('		return $f->call($f);	')->call(closure(get_defined_vars(), '$f')->scope('		return $le->call(closure(get_defined_vars(), \'$x\')->scope(\'			return $f->call($f)->call($x);		\'));	'));}$factorial = Y(closure(array(), '$fac')->scope('	return closure(get_defined_vars(),\'$n\')->scope(\'		return $n <= 2 ? $n : $n * $fac->call($n - 1);	\');'));echo $factorial->call(5);/*Javascript Version:function Y(le) {    return function (f) {        return f(f);    }(function (f) {        return le(function (x) {            return f(f)(x);        });    });}var factorial = Y(function (fac) {    return function (n) {        return n <= 2 ? n : n * fac(n - 1);    };});var number120 = factorial(5);*/