/**
* Implement the singleton pattern, using a static accessor.
*
* @param string $DBHOST
* @param string $DBPORT
* @param string $DBNAME
* @param string $DBUSER
* @param string $DBPASS
*
* @throws Exception
*/
public static function createInstance($DBHOST, $DBPORT, $DBNAME, $DBUSER, $DBPASS)
{
if (self::$pdo instanceof PDO) {
throw new Exception('WT_DB::createInstance() can only be called once.');
}
// Create the underlying PDO object
self::$pdo = new PDO(substr($DBHOST, 0, 1) == '/' ? "mysql:unix_socket={$DBHOST};dbname={$DBNAME}" : "mysql:host={$DBHOST};dbname={$DBNAME};port={$DBPORT}", $DBUSER, $DBPASS, array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_OBJ, PDO::ATTR_CASE => PDO::CASE_LOWER, PDO::ATTR_AUTOCOMMIT => true));
self::$pdo->exec("SET NAMES UTF8");
self::$instance = new self();
}
