<?php
$host="localhost"; // Host name
$username="root"; // Mysql username
$password=""; // Mysql password
$db_name="preschool"; // Database name
$tbl_name="admin"; // Table name
mysql_connect($host,$username,$password) or die ('Could Not Connect.');
mysql_select_db("$db_name") or die ("No Database found.");
$username=$_POST['username'];
$password=$_POST['password'];
$username = stripslashes($username);
$password = stripslashes($password);
$username = mysql_real_escape_string($username);
$password = mysql_real_escape_string($password);
$sql="SELECT * FROM admin WHERE username='$username' and password='$password'";
$result=mysql_query($sql);
$count=mysql_num_rows($result);
if($count==1){
session_start();
if(!@session_is_registered('username')){
header("location:loginProcess.php");}
$_SESSION['session_name'] = 'username';
$_SESSION['session_name'] = 'password';
header("location:admin.php");}
else {
header("location:loginError.php");} ?>

<?php
 include("connect.php");
 $sql='SELECT * FROM online';
 $result=mysql_query($sql) or die("Cannot execute sql.");
.
.
?>