title: Undefined index on page load
body: <p>the message is</p>
  
  <blockquote>
    <p>Notice: Undefined index: flag in C:\xampp\htdocs\myfiles\mobile tracking\index.php on line 63</p>
  </blockquote>
  
  <p>my code is</p>
  
  <pre><code>&lt;?php 
     $stat=$_REQUEST['flag'];
     if($stat=="FAILED")
         {
        echo "Username/password doesnot exists";
     }
  ?&gt;
  </code></pre>