YS - Subscribe form

/**Display Form using short-code**/

[subscription_form]



/**Custom Subscribe Form Style Start**/



#subscribe-form {
    display: flex;
    gap: 10px;
}

#subscribe-form input[type="email"] {
		width: 100%;
		height: 40px;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 3px;
    font-size: 16px;
    flex: 1;
}
#subscribe-form input:focus,input:hover{
	border-color: #3498db;
}

#subscribe-form button {
		line-height: 1rem;
    padding: 10px 20px;
    border: none;
    background-color: black;
    color: white;
    font-size: 1rem;
    border-radius: 3px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#subscribe-form button:hover {
    background-color: #333;
}

#form-message {
    margin-top: 10px;
    font-size: 16px;
}

#form-message.success {
    color: green;
}

#form-message.error {
    color: red;
}


@media only screen and (max-width: 600px){
	#subscribe-form {
		flex-wrap: wrap;
}
	#subscribe-form input[type="email"] {
	width: 100%;
}

#subscribe-form button {
	width: 100%;
}
}

/**Custom Subscribe Form Style End**/





/** Form PHP start**/

//**this snippet will going to register user as wordpress subscriber on form submit.
  
 /*you can use any snippet plugin or directly add this snippet into your theme function.php file*/
  
<?php

function subscription_form_handler() {
    $output = '';

    // Check if the form is submitted
    if ($_SERVER['REQUEST_METHOD'] == 'POST' && isset($_POST['subscribe'])) {
        if (isset($_POST['email']) && is_email($_POST['email'])) {
            $email = sanitize_email($_POST['email']);

            if (email_exists($email)) {
                $message = 'already_registered';
            } else {
                $username = sanitize_user(explode('@', $email)[0] . '_' . wp_generate_password(4, false));
                $password = wp_generate_password();

                $user_id = wp_create_user($username, $password, $email);
                if (is_wp_error($user_id)) {
                    $message = 'subscription_failed';
                } else {
                    $user = new WP_User($user_id);
                    $user->set_role('subscriber');
                    $message = 'subscription_successful';
                }
            }
        } else {
            $message = 'invalid_email';
        }

        // Redirect to the same page with the message parameter
        wp_redirect(add_query_arg('message', $message, get_permalink()));
        exit;
    }

    // Always display the form
    $output .= '
    <form id="subscribe-form" method="post">
        <input type="email" name="email" placeholder="E-Mail" required>
        <button type="submit" name="subscribe">Subscribe</button>
    </form>';

    // Display the message if it exists in the URL parameters
    if (isset($_GET['message'])) {
        switch ($_GET['message']) {
            case 'already_registered':
                $output .= '<div id="form-message" class="error">Already Registered</div>';
                break;
            case 'subscription_failed':
                $output .= '<div id="form-message" class="error">Subscription failed.</div>';
                break;
            case 'subscription_successful':
                $output .= '<div id="form-message" class="success">Subscription successful!</div>';
                break;
            case 'invalid_email':
                $output .= '<div id="form-message" class="error">Invalid email address.</div>';
                break;
        }
    }

    return $output;
}

add_shortcode('subscription_form', 'subscription_form_handler');

function enqueue_custom_script() {
    ?>
    <script type="text/javascript">
        document.addEventListener('DOMContentLoaded', function() {
            const url = new URL(window.location);
            if (url.searchParams.has('message')) {
                url.searchParams.delete('message');
                window.history.replaceState({}, document.title, url.toString());
            }
        });
    </script>
    <?php
}

add_action('wp_footer', 'enqueue_custom_script');

?>


/**Form Php End **/