(1) $HTTP_SESSION_VAR ==> $_SESSION
(2) $HTTP_POST_VAR ==> $_POST
(3) $HTTP_GET_VAR ==> $_GET
(1) mysql_select_db("dbname") ==> mysqli_select_db($conn,"dbname")
(2) mysql_query("SET CHARACTER SET Big5"); ==> mysqli_query($conn, "SET CHARACTER SET Big5");
(3) mysql_connect ==> mysqli_connect
(4) mysql_num_rows($result) ==> mysqli_num_rows($result)
(5) mysql_fetch_object($result) ==> mysqli_fetch_object($result)