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Date: Thu, 22 Nov 2007 21:29:19 +0100
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Subject: Re: [PHP-DEV] late static binding php6
From: marco.kaiser@gmail.com ("Marco Kaiser")

Hi List,

just to drop my note here, i asked (i think) 2 years ago for such a
feature to automate my singleton pattern. Not with late static
bindings this is possible.

<?php
class singleton
{
	static protected $_instance = null;

	static public function getInstance()
	{
	    $caller = get_called_class();
	    if (!static::$_instance instanceof $caller) {
            static::$_instance = new $caller;
	    }

	    return static::$_instance;
	}
}

class foo extends singleton
{
}

var_dump(foo::getInstance());
var_dump(foo::getInstance());
?>

i think this will also drop much redundant code from some frameworks. :)
So this is one of my examples that helps much.


-- 
Marco Kaiser