Simas Toleikis wrote:
php6 will include static late binding
Great. Love the other new features, especially namespaces.
not sure namespaces will make it ... I believe the decision on that
is still out.
- until then you have 2 choices,
create a hack (see below) or stick redundant code into each class you
want to be a singleton.
The hack doesn't work (See below). Guess we are left with copy-paste
my bad - I was thinking out loud and didn't check. here is a less elegant
hack that does get some of the way to where you want to be (take
a look at what happens if you set Singleton::__construct() as private -
you get a weird error, which to me smell like a bug - but then again there
is some logic to it, although I wonder if it's intended)
:
<?php
class Test extends Singleton
{
static public function getInstance()
{
return self::_getInstance(__CLASS__);
}
}
abstract class Singleton
{
private static $instance;
protected function __construct() {}
private function __clone() {}
abstract static public function getInstance();
protected static function _getInstance($c)
{
if (!isset(self::$instance)) {
self::$instance = new $c;
}
return self::$instance;
}
}
var_dump( Test::getInstance() );
?>
thing :-/ Though i wonder if there are any other hacks using some sort
of classkit/other class manipulation functions?
probably runkit (or is it classkit - can't remember which of those
is more actively developed) might give a way out - but I would recommend
it for production code.
public static function GetInstance()
{
if (!isset(self::$instance)) {
if (!isset(self::$class)) {
Isn't that self::$class the same "late static binding" thing? :-) As i
yeah - put it down to a thinko.
get it, at this point from Singleton::GetInstance() you can't get the
static $class member of Test class.
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