login.php
<?php session_start(); ?>
<html>
<head>
<title>Untitled Document</title>
</head>
<body>
<?php
$con=mysql_connect("localhost","root","");
mysql_select_db("test");
if(isset($_POST['submit'])&&($_POST['txtuser']!=""))
{
$sql="select * from login where username='".$_POST['txtuser']."' and password='".$_POST['txtpass']."'";
$nsql=mysql_query($sql);
$nofrow=mysql_num_rows($nsql);
if($nofrow>=1)
{
$_SESSION['user']=$_POST['txtuser'];
?>
<script language="javascript">
window.location="index.php";
</script>
<?php
}
if($nofrow<=0)
{
$_SESSION['user']="";
echo "Please enter Valid Username and Password";
}
}
?>
<form method="post">
<table align="center" border="1">
<tr>
<td>UserName</td>
<td><input type="text" name="txtuser" /></td>
</tr>
<tr>
<td>Password</td>
<td><input type="password" name="txtpass" /></td>
</tr>
<tr>
<td><input type="submit" name="submit" value="Submit" /></td>
<td><input type="reset" name="reset" value="Cancle" />
</tr>
</table>
</form>
</body>
</html>
index.php
<?php session_start(); ?>
<html>
<head>
<title>Untitled Document</title>
</head>
<body>
<a href="logout.php">Logout</a>
<br />
<?php
if($_SESSION['user']=="")
{
?>
<script language="javascript">
window.location="login.php";
</script>
<?php
}
if(isset($_SESSION['user']))
{
echo "Welcome to ".$_SESSION['user'];
}
else
{
header("Location:login.php");
}
?>
</body>
</html>
logout.php
<?php session_start();
if(isset($_SESSION['user']))
{
unset($_SESSION['user']);
$_SESSION['user']="";
?>
<script language="javascript">
window.location="login.php";
</script>
<?php
}
?>
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