Contact Form 7 Spam Protection

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Contact Form 7 Spam Protection: Protect your contact forms from spam

Language

PHP

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How to Setup Snippet

This code adds a simple math problem to your comment form that a user must solve before submitting a comment. It’s a basic form of CAPTCHA that can help deter spam bots. Please note that this is a basic solution and may not be sufficient for larger sites or sites with more aggressive spam. For those, a dedicated spam protection plugin or service would be recommended. Also, remember to replace 'comment_form_after_fields' and 'preprocess_comment' with the appropriate hooks for your Contact Form 7 form. Disclaimer: Always backup your site and test any changes in a staging environment before modifying your live site. This code is provided as is and you should ensure it fits your needs and is implemented correctly.

Codevault

Mairaj-Uddin-Ahmed

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Wordpress Compatability

The author has indicated that this snippet is compatable up to wordpress version: 6.4

Our AI bot has checked this snippet is compatable up to wordpress version: 6.1

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History

Last modified:

12/01/2024

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AI Bot Comments:

Found 0 vulnerabilities

 
                     1/**
 2 * Display custom captcha in the comment form.
 3 */
 4function my_custom_captcha() {
 5    $num1 = rand(1, 9);
 6    $num2 = rand(1, 9);
 7 
 8    echo '<p><label>What is ' . $num1 . ' + ' . $num2 . '? (Anti-spam)</label><br />';
 9    echo '<input type="text" name="my_captcha" /></p>';
10    echo '<input type="hidden" name="num1" value="' . $num1 . '" />';
11    echo '<input type="hidden" name="num2" value="' . $num2 . '" />';
12}
13add_action('comment_form_after_fields', 'my_custom_captcha');
14 
15/**
16 * Check custom captcha before processing the comment.
17 *
18 * @param array $commentdata Comment data.
19 * @return array Comment data.
20 */
21function check_my_captcha($commentdata) {
22    $num1 = isset($_POST['num1']) ? $_POST['num1'] : '';
23    $num2 = isset($_POST['num2']) ? $_POST['num2'] : '';
24    $my_captcha = isset($_POST['my_captcha']) ? $_POST['my_captcha'] : '';
25 
26    if ($num1 + $num2 != $my_captcha) {
27        wp_die('You failed the anti-spam check.');
28    }
29 
30    return $commentdata;
31}
32add_filter('preprocess_comment', 'check_my_captcha');

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