how can i prevent spam in subscriber in php

Question

  <form action="newsletter" method="POST">
                        <div class="input-group">
                          <input type="email" class="form-control box-style-1" size="50" name="email" placeholder="Your email" required>
                          <input type="hidden" name="code" value="<?php echo $code; ?>" >
                          <div class="input-group-btn">

                            <button type="submit" class="btn subscribe-btn">Subscribe</button>
                          </div>
                        </div>
                     </form>

I have tried to send a hidden code (randomly generated) through form but i am not able to prevent the spam.

use captcha with session follow this https://www.phpjabbers.com/captcha-image-verification-php19.html — pravindot17, Jun 19 '17 at 12:30
use double hidden input, the first to define the anti-spam method and the second to pass the verification value — Nolwennig, Jun 19 '17 at 12:30
Random code has to be a part of JS, otherwise it'll be simply parsed by bots — FieryCat, Jun 19 '17 at 12:37

FieryCat · Accepted Answer · 2017-06-19T12:37:42.810

-1

Random code has to be a part of JavaScript, otherwise it'll be simply parsed by bots

Use reCapcha for that; or extra-header for each request (that will be a part of JS); or check RELATIVE_URL to validate that submit was done from your site.

edited Jun 19 '17 at 12:37

answered Jun 19 '17 at 12:29

FieryCat

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how can i prevent spam in subscriber in php

1 Answers1