Chat programs using row-write (part 2)

Lt1.php (as the mainstream development language): This program is the portal of the entire system. It contains two global parameters: chat_hh. the uname records the maximum number of speakers and the name of the Speaker respectively. & lt ;? Session_start (); session_register (chat_hh); session_register (uname); // obtain the largest lt1.php database (as the mainstream development language ):
This program is the entrance of the entire system, containing two global parameters: chat_hh, uname, respectively, recording the current maximum number of speakers and the speaker name

Session_start ();
Session_register ("chat_hh ");
Session_register ("uname ");


// Obtain the maximum number of a database
Include ("g_fun.php (as the mainstream development language )");
F_connectdb ();
$ Query = "select max (lt_id) as rmaxid from lt_t_content ";
$ Res = MySQL (the best combination with PHP) _ query ($ query, $ dbh );
$ Row = MySQL (the best combination with PHP) _ fetch_array ($ res );
$ F_chat_hh = $ row ["rmaxid"];
If (empty ($ f_chat_hh) {$ f_chat_hh = 0 ;}
If ($ f_chat_hh> 12 ){
$ Chat_hh = $ f_chat_hh-12;
} Else
$ Chat_hh = $ f_chat_hh;

$ Un_len = strlen ($ name );
$ Uname = $ name;

// Add online personnel information
$ Query = "select count (*) as rcount from lt_t_online where lt_username =". $ name ."";
$ Res = MySQL (the best combination with PHP) _ query ($ query, $ dbh );
$ Row = MySQL (the best combination with PHP) _ fetch_array ($ res );
$ Lcount = $ row ["rcount"];
If ($ lcount = 0 ){
$ Query = "insert into lt_t_online (lt_username, lt_lasttime) values (";
$ Query. = "". $ name. ", now ())";
$ Res = MySQL (the best combination with PHP) _ query ($ query, $ dbh );
}
$ Query = "update lt_t_online set lt_lasttime = now (), lt_state = 0 ";
$ Query. = "where lt_username =". $ name ."";
$ Res = MySQL (the best combination with PHP) _ query ($ query, $ dbh );
?>


Php (as the mainstream development language) does not refresh the chat room