Database Connection Class

require_once('DB.php');

class DBcon
{
private $instance;

function getInstance(){
if(isset($this->instance)){
return $this->instance;
}else{
$dsn = DB_TYPE.'://'.DB_USER.':'.DB_PWD.'@'.DB_HOST.'/'.DB_DB;
$this->instance = DB::connect($dsn);
if(DB::isError($this->instance))
{
header('Location: '.DB_ERROR_FILE);
exit();
}
$this->instance->setFetchMode(DB_FETCHMODE_ASSOC);
return $this->instance;
}
}

function lastId(){
return mysql_insert_id();
}

}

?>