<?php
$host = "mysql14.000webhost.com"; // Host name
$username = "a6524640_member"; // Mysql username
$password = "password"; // Mysql password
$db_name = "a6524640_social"; // Database name

// Connect to server and select database.
mysql_connect($host, $username, $password) or die(mysql_error());
mysql_select_db($db_name) or die(mysql_error());

session_start();
$username = $_SESSION['username'];

$query = mysql_query("UPDATE member SET status='Online' WHERE username='$username'") or die(mysql_error());

?>