A Better WordPress Singleton

improved-singleton.php

<?php

//http://jamesdigioia.com/a-better-wordpress-singleton/

class PluginClass
{
    protected static $instance = null;
    
    public function __construct($file)
    {
        if (static::$instance !== null) {
            throw new Exception;
        }

        static::$instance = $this;
    }

    public static function get()
    {
        return static::$instance;
    }
}