Untitled

//file: login.php

...
if (!$_SESSION['username']) {
?>


<br>
<table width="300" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<form name="form1" method="post" action="checklogin.php">
<td>
<table width="100%" border="0" cellpadding="3" cellspacing="1" bgcolor="#FFFFFF">
<tr>
<td colspan="3"> <strong> Belépés </ strong> </ td>
</ TR>
<tr>
<td width="78"> Felhasználó </ td>
<td width="6">: </ td>
<td width="294"><input name="myusername" type="text" id="myusername"></ td>
</ TR>
<tr>
<td> jelszó </ td>
<td>: </ td>
<td><input name="mypassword" type="password" id="mypassword"></ td>
</ TR>
<tr>
<td> </ td>
<td> </ td>
<td><input type="submit" name="Submit" value="Login"></ td>
</TR>
</Table>
</Td>
</Form>
</TR>
</table><br>
<?
}
else {
  print "Már be vagy jelentkezve<br>
  kijelentkezés <a href="127.0.0.1/logout.php">kacc</a>";
};
...


/*-------------------------------------------*/

//file: checklogin.php

<?php
require_once("config.php");
require_once("connect.php");
ob_start();
$tbl_name="users"; // Table name

// Connect to server and select databse.
mysql_connect("$mysql_host", "$mysql_user", "$mysql_pass")or die("cannot connect");
mysql_select_db("$mysql_db")or die("cannot select DB");

// Define $myusername and $mypassword
$myusername=$_POST['myusername'];
$mypassword=md5($_POST['mypassword']);

// To protect MySQL injection (more detail about MySQL injection)
$myusername = stripslashes($myusername);
$mypassword = stripslashes($mypassword);
$myusername = mysql_real_escape_string($myusername);
$mypassword = mysql_real_escape_string($mypassword);

$sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'";
$result=mysql_query($sql);

// Mysql_num_row is counting table row
$count=mysql_num_rows($result);
// If result matched $myusername and $mypassword, table row must be 1 row

if($count==1){
// Register $myusername, $mypassword and redirect to file "login_success.php"
session_start();
$_SESSION['username'] = $myusername;
$_SESSION['password'] = $mypassword;
$_SESSION['time'] = time();
header("location:login_success.php");
}
else {
echo "Wrong Username or Password";
}

ob_end_flush();
?>


/*-------------------------------------------*/

//file: login_succes.php

<?php
session_start();
if(!session_is_registered(myusername)){
header("location:login.php");
}
$_SESSION["id"] = $id;
$_SESSION["username"] = $myusername;
$_SESSION["password"] = md5($_POST['mypassword']);
$_SESSION["gmlevel"] = $gmlevel;
?>

<html>
<body>
Login Successful
</body>
</html>
<?
?>

/*-------------------------------------------*/

//file: logout.php

<?
session_start();
session_destroy();
?>