the login code of php
<pre><code>&lt;?php
 //Start session
 session_start();

 //Define the users and passwords.
 $users = array(
   array("username1","password1"),
   array("username2","password2"),
   array("username2","password2") 
 );

 //Define the log in page if login failed.
 $exitpage = "login.htm";
</code></pre>

<p>This code is from the internet (user login code ). But I don't know this part means. Why it declares three users? And why the last two ones are same?</p>
