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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 * limitations under the License.
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 */
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 */
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// Please reply this code with your actual implementation
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// Please replace this code with your actual implementation
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db_connect('localhost', 'root', '');
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db_select_db('logviewer');
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# ---
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// Liefert die Anzahl der Zeilen im Ergebnis
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function db_num_rows($result) {
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        if (!$result) {
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                $err = db_error();
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                throw new Exception("Called db_num_rows() with an erroneous argument.".($err == '' ? '' : " Possible cause: $err"));
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        }
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        return $result->num_rows;
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}
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// Liefert eine Ergebniszeile als Objekt
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function db_fetch_object($result, $class_name="stdClass", $params=null) {
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        if (!$result) {
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                $err = db_error();
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                throw new Exception("Called db_fetch_object() with an erroneous argument.".($err == '' ? '' : " Possible cause: $err"));
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        }
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        if ($params) {
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                return $result->fetch_object($class_name, $params);
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        } else {
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                return $result->fetch_object($class_name);
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        }
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}
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// Öffnet eine Verbindung zu einem MySQL-Server
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function db_connect($server=null, $username=null, $password=null, $new_link=false, $client_flags=0) {
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        global $vts_mysqli;
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        $ary = explode(':', $server);
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        $host = $ary[0];
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        $ini_port = ini_get("mysqli.default_port");
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        $port = isset($ary[1]) ? (int)$ary[1] : ($ini_port ? (int)$ini_port : 3306);
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        if (is_null($server)) $port = ini_get("mysqli.default_host");
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        if (is_null($username)) $port = ini_get("mysqli.default_user");
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        if (is_null($password)) $port = ini_get("mysqli.default_password");
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        $vts_mysqli = new mysqli($host, $username, $password, /*dbname*/'', $port, ini_get("mysqli.default_socket"));
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        return (empty($vts_mysqli->connect_error) && ($vts_mysqli->connect_errno == 0)) ? $vts_mysqli : false;
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}
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// Schließt eine Verbindung zu MySQL
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function db_close($link_identifier=NULL) {
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        global $vts_mysqli;
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        $li = is_null($link_identifier) ? $vts_mysqli : $link_identifier;
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        if (is_null($li)) throw new Exception("Cannot execute db_close(). No valid connection to server.");
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        return $li->close();
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}
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// Liefert den Fehlertext der zuvor ausgeführten MySQL Operation
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function db_error($link_identifier=NULL) {
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        global $vts_mysqli;
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        $li = is_null($link_identifier) ? $vts_mysqli : $link_identifier;
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        if (is_null($li)) throw new Exception("Cannot execute db_error(). No valid connection to server.");
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        return !empty($li->connect_error) ? $li->connect_error : $li->error;
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}
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// Maskiert spezielle Zeichen innerhalb eines Strings für die Verwendung in einer SQL-Anweisung
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function db_real_escape_string($unescaped_string, $link_identifier=NULL) {
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        global $vts_mysqli;
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        $li = is_null($link_identifier) ? $vts_mysqli : $link_identifier;
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        if (is_null($li)) throw new Exception("Cannot execute db_real_escape_string(). No valid connection to server.");
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        return $li->escape_string($unescaped_string);
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}
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// Sendet eine Anfrage an MySQL
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function db_query($query, $link_identifier=NULL) {
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        global $vts_mysqli;
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        $li = is_null($link_identifier) ? $vts_mysqli : $link_identifier;
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        if (is_null($li)) throw new Exception("Cannot execute db_query(). No valid connection to server.");
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        return $li->query($query, $resultmode=MYSQLI_STORE_RESULT);
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}
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// Auswahl einer MySQL Datenbank
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function db_select_db($database_name, $link_identifier=NULL) {
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        global $vts_mysqli;
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        $li = is_null($link_identifier) ? $vts_mysqli : $link_identifier;
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        if (is_null($li)) throw new Exception("Cannot execute db_select_db(). No valid connection to server.");
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        return $li->select_db($database_name);
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}
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// Liefert die ID, die in der vorherigen Abfrage erzeugt wurde
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function db_insert_id($link_identifier=NULL) {
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        global $vts_mysqli;
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        $li = is_null($link_identifier) ? $vts_mysqli : $link_identifier;
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        if (is_null($li)) throw new Exception("Cannot execute db_insert_id(). No valid connection to server.");
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        return $li->insert_id;
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}
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mysql_connect('localhost', 'root', '');
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mysql_select_db('logviewer');
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