PHP implementation of online User computing _php tutorial

Include "class/config.inc.php"; Include the configuration file in
$DB = new db;
$db-Db_connect (); Connecting to a database
$user = new User; Initialization
$session = new Session;
Start session
Session_Start ();
Delete a user who has expired in the session table (ie not online) because this file is always called to ensure that the current user is displayed online
$curtime =time ();
$con = "lastactivity< $curtime";
$session->del ($con);
Online users need to constantly update the lastactivity time in the session table, and reset the user's Cookies
if ($HTTP _session_vars["online"]== "on") {//Here is also available $_session["online"]
$userid = $HTTP _session_vars["userid"]; UserID of the current online user
$ipaddress =substr ($REMOTE _addr,0,50);
$lastactivity =time () +3600; The last active time is updated, if the page is not mobilized within one hours, the user is considered offline and will be deleted.
$session->update ($userid, $ipaddress, $lastactivity);
}else{
If not logged in then go directly to the login page
$firstpage = "logon.php";
Header ("Location: $firstpage");
Exit
}

Insert ($userid, $ipaddress, $lastactivity) inserts a successful user into the table
Update ($userid, $ipaddress, $lastactivity) updates the last active time for online users
Del ($con) Remove the user who satisfies the condition, use it to clear the offline user
Get_from_condition ($con) returns the recordset that satisfies the query criteria

if ($hiddenField = = "0") {//test form has not been submitted
$con = "Username= ' $username ' and userpwd= ' $userpwd '";
$result = $user->get_from_condition ($con);
if ($user->counter==1) {
if (!session_is_registered ("online")) {//detection is registered
Session_register ("online"); Register a new variable for the session variable
}
if (!session_is_registered ("Ccauser")) {
Session_register ("Ccauser");
}
if (!session_is_registered ("userid")) {
Session_register ("userid");
}
$ccauser = $username; Assigning a value to a session variable
$online = "on"; This variable is used in global.php to update the last active time lastactivity
$userid = $user->userid;
$ipaddress =substr ($REMOTE _addr,0,50);
$lastactivity =time () +3600;
$con = "Userid= $userid";
$session->get_from_condition ($con);
To determine if a session exists, it is possible that you can log on to a different machine two times.
if ($session->counter==1) {
$session->update ($userid, $ipaddress, $lastactivity); If present, update
}else{
$session->insert ($userid, $ipaddress, $lastactivity); If not present, insert
}
Setting cookies on the client
Setcookie ("Ccauser", $username, Time () +3600);
Header ("Location:test.php");//Then guide the test page
}
}
?>
if ($HTTP _session_vars["online"]== "") {//determine if logged in
?>
The following is a signed-in form

Name:
Password:

}else{
echo "Netizen:". $HTTP _cookie_vars["Ccauser"]. " You are already logged in. "; Show a prompt if you are logged in
$str = "

Exit the community ";
Echo $str;
}
?>

Include "global.php"; Include the global.php file in
$strWelcome = "Welcome". $_session[' Ccauser ']. "
";
Echo $strWelcome; Show welcome Message
$str = "Current Online User:
===================
”;
$con = "1=1";
All the records in the session table are the current online users, not counting the visitors.
$result = $session->get_from_condition ($con);
while ($row =mysql_fetch_array ($result)) {
$con 1= "userid= $row [UserID]";
$user->get_from_condition ($con 1);
$str. = $user->username. " ";
}
Echo $str;
?>

Exit the Community

http://www.bkjia.com/PHPjc/630494.html www.bkjia.com true http://www.bkjia.com/PHPjc/630494.html techarticle Include class/config.inc.php;//include the configuration file in $db = new db; $db-db_connect ();//Connect database $user = new user;//Initialize $session = New session; Start Session ...

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