/**
* 加载数据库
*/
public function load_db()
{
include_once LIBS_DIR . 'pdo.class.php';
$dbh = new DB_PDO(DB_DSN, DB_USER, DB_PASSWORD);
$dbh->set_table_prefix(DB_TABLE_PREFIX);
$dbh->set_options(array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8'));
return $dbh;
}
