PHP Secure Login - password encryption
Here is the login system to which the secure login is to be implemented/
main_login.php
<form name="form1" method="post" action="checklogin.php">
Username:<input name="myusername" type="text" id="myusername" /> <br />
Password:<input name="mypassword" type="password" id="mypassword" />
<input type="submit" name="Submit" value="Login" />
</form>
Checklogin.php
<?php
ob_start();
$host="localhost"; // Host name
$username="root"; // Mysql username
$password=""; // Mysql password
$db_name="cosmos"; // Database name
$tbl_name="members"; // Table name
// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
// Define $myusername and $mypassword
$myusername=$_POST['myusername'];
$mypassword=$_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, $mypassword and redirect to file "login_success.php"
session_register("myusername");
session_register("mypassword");
header("location:login_success.php");
}
else {
echo "Wrong Username or Password";
}
ob_end_flush();
?>
login_success.php
<?php
session_start();
if(isset($_SESSION['username']) && ($_SESSION['username'] == $myusername)){
header("location:main_login.php");
}
?>
<html>
<body>
Login Successful. <a href="logout.php">Logout</a>
</body>
</html>
logout.php
<?php
session_destroy();
header("location:main_login.php");
?>
the problem is that I want to make this secure login by password encryption or any other method (if any). I am beginner to PHP
Answer
You can encrypt the password to a degree with md5. You would need to md5 the password from when the user signs up and before the login md5....
Example:
// Define $myusername and $mypassword
$myusername=$_POST['myusername'];
$mypassword=$_POST['mypassword'];
$mypassword = md5($mypassword);
You would also need to use this whenever you have a user sign up.