static function getInstance()
{
if (self::$instance === false) {
switch (self::getType()) {
case 'mysql':
mysql_db::$host = self::$host;
mysql_db::$user = self::$user;
mysql_db::$pwd = self::$pwd;
mysql_db::$dbname = self::$dbname;
self::$instance = mysql_db::getInstance();
break;
default:
die('No database of type ' . self::getType() . ' found');
}
}
return self::$instance;
}
public function __construct($strategy)
{
$dbm = array('mysql', 'mysqli', 'pgsql');
if (in_array($strategy, $dbm) === false) {
throw new Exception('Invalid parameter for Data Base Strategy');
}
try {
switch ($strategy) {
case 'mysql':
$this->strategy = mysql_db::getInstance();
break;
case 'mysqli':
$this->strategy = mysqli_db::getInstance();
break;
case 'pgsql':
$this->strategy = pgsql_db::getInstance();
break;
}
} catch (Exception $e) {
echo $e->getMessage();
}
}
