PHP User online tutorial

This tutorial show you php script that count how many users are active on your site.

Overview

In this tutorial, create 1 PHP file for testing this code.
1. user_online.php

Steps
1. Create table "user_online" in mysql in database "test".
2. Create file user_online.php.

STEP1: Create table "user_online"


CREATE TABLE `user_online` (
`session` char(100) NOT NULL default '',
`time` int(11) NOT NULL default '0'
) TYPE=MyISAM;

STEP2: Create file - user_online.php

############### Code

<?php

session_start();
$session=session_id();
$time=time();
$time_check=$time-600; //SET TIME 10 Minute

$host="localhost"; // Host name
$username=""; // Mysql username
$password=""; // Mysql password
$db_name="test"; // Database name
$tbl_name="user_online"; // Table name

// Connect to server and select databse
mysql_connect("$host", "$username", "$password")or die("cannot connect to server");
mysql_select_db("$db_name")or die("cannot select DB");

$sql="SELECT * FROM $tbl_name WHERE session='$session'";
$result=mysql_query($sql);

$count=mysql_num_rows($result);

if($count=="0"){

$sql1="INSERT INTO $tbl_name(session, time)VALUES('$session', '$time')";
$result1=mysql_query($sql1);
}

else {
"$sql2=UPDATE $tbl_name SET time='$time' WHERE session = '$session'";
$result2=mysql_query($sql2);
}

$sql3="SELECT * FROM $tbl_name";
$result3=mysql_query($sql3);

$count_user_online=mysql_num_rows($result3);

echo "User online : $count_user_online ";

// if over 10 minute, delete session
$sql4="DELETE FROM $tbl_name WHERE time<$time_check";
$result4=mysql_query($sql4);

// Open multiple browser page for result


// Close connection

mysql_close();
?>


Similar Post

PHP Script Image of the day

In this script shows you how to display image of the day. You can adapt this script to display quote of the day, knowledge of the day or something else you want. You don't have to change image everyday just change images once a week.

PHP Multiple files upload

You can upload multiple files with one time submittion. Array is a big role in this tutorial, let's see the scripts.