Answer by espaciomore for How to initialize static variables

best way is to create an accessor like this:

/*** @var object $db : map to database connection.*/public static $db= null; /*** db Function for initializing variable.   * @return object*/public static function db(){ if( !isset(static::$db) ){  static::$db= new \Helpers\MySQL( array("hostname"=> "localhost","username"=> "root","password"=> "password","database"=> "db_name"    )  ); } return static::$db;}

then you can do static::db(); or self::db(); from anywhere.