title: Notice Undefined Index php 5.6
body: <p>I have write the code as:</p>
  
  <pre><code> // session_start();
   $auid = isset($_POST['auid']) ? $_POST['auid'] : $_SESSION['auid'];
   $pwd = isset($_POST['pwd']) ? $_POST['pwd'] : $_SESSION['pwd'];
  </code></pre>
  
  <p>Getting error</p>
  
  <blockquote>
    <p>Notice: Undefined index: auid, pwd</p>
  </blockquote>
  
  <p>What is substitute of isset() in this case? Assume the code is being called without any initialization or the first calling code of application.</p>
  
  <p><strong>Based upon this short syntax, the value can only be passed of either of these two index variables.</strong></p>