singleton pattern in PHP 4

Question

is it possible to create a singleton class in PHP 4?

Right now I have something like http://pastebin.com/4AgZhgAA which doesn't even get parsed in PHP 4

What's the minimum PHP version required to use a singleton like that?

Answer 1

PHP4 and OOP === car without engine (:

It is possible but impractical.

Look this sample code:

class SomeClass
{
    var $var1;

    function SomeClass()
    {
        // whatever you want here
    }

    /* singleton */
    function &getInstance()
    {
        static $obj;
        if(!$obj) {
            $obj = new SomeClass; 
        }
        return $obj;
    }
}