title: Getting error while capturing payment in RazorPay. Undefined index, razorpay_signature
body: <p>I've integrated Razorpay payments using PHP, and I'm getting error while capturing the payment, with the following errors.</p>
  
  <pre><code>Notice: Undefined index: razorpay_signature in /Applications/XAMPP/xamppfiles/htdocs/feedback/dashboard/admin/verify.php on line 27
  
  Warning: hash_equals(): Expected user_string to be a string, null given in /Applications/XAMPP/xamppfiles/htdocs/feedback/dashboard/admin/razorpay-php/src/Utility.php on line 32
  </code></pre>
  
  <p>Screenshot:</p>
  
  <blockquote>
    <p>Undefined index: Razorpay Signature</p>
  </blockquote>
  
  <p><a href="https://i.stack.imgur.com/nte01.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nte01.png" alt="enter image description here"></a>
  <em>Note: Amount generated for paying is dynamic in my case!</em></p>