Submit form using anchor tag

Question

I'm currently working on my webpage where I'm using an anchor tag to process the request. Here is the portion of my code:

<a href="?redirect=Pro" target="_blank">I AGREE</a>

It works okay. However, I added an input field and I have to include that in my process on "?redirect=Pro" . My input field value is not being processed because the form is not being submitted/processed. I already tried the:

<form id="discount">
      <input type="hidden" id="coupon_applied">
</form>
<a id = "agree" onclick="document.getElementById('discount').submit()" href="?redirect=Pro" target="_blank">I AGREE</a>

But I still can't get it to work.

I can't remove the ?redirect=Pro because that's where all my process is happening. Any advice on how I i will modify my code to accommodate this would be much appreciated.

EDIT: This is a preview of my pricing.php file for more info:

<?php
     session_start();
     $link=$_GET['redirect'];
     $discount_amount = $_POST['coupon_applied'];
if ($link == 'Pro')
     {
        echo "<script type='text/javascript'>alert('$discount_amount')</script>";
    }
?>

<form id="discount" action="pricing.php" method="post">
     <input type="hidden" id="coupon_applied">
</form>
<a onclick="document.getElementById('discount').submit()" href="?redirect=Pro" target="_blank">I AGREE</a>

With my current code, echo is returning blank/null.

Answer 1

您应该在表单中使用method和action ，例如： <form action="/action_page.php" method="post">