tex0gen

This WordPress plugin ensures that search engine indexing is automatically turned OFF if the site’s URL doesn’t match the provided live site URL. It’s especially useful for development and staging environments, where you might not want content to be indexed by search engines.
Features: 
– Automatically turns off search engine indexing for non-live sites. 
– Provides an admin settings page to specify the live site URL. 
– Displays an admin notice if indexing has been turned off due to URL mismatch. 
– Encodes the live site URL to prevent inadvertent changes when using migration tools. 
– Admin notice prompts for setting the live site URL if it hasn’t been configured yet.
<h3>Usage</h3>
<ol>
<li>After activating the plugin, go to the admin dashboard.</li>
<li>Navigate to <code>Settings</code> -> <code>Prevent Indexing</code>.</li>
<li>Enter your live site URL in the provided input field and save.</li>
<li>If the current site’s URL doesn’t match the provided live site URL, search engine indexing will be turned off, and an admin notice will inform you of the same.</li>
</ol>
<h3>License</h3>
<a href="https://www.gnu.org/licenses/gpl-2.0.html" rel="nofollow ugc">GPLv2 or later</a>

Prevent Indexing on Non-Live Sites

Prevent your WordPress website from being indexed by search engines when it's not on the live site.

ctomczyk

Spam Prevention for WP Contact Form 7 and WordPress Comments. 
This plugin adds a small code snippet to determine page scroll and add dynamically a unique token. 
It also supports the “Contact Form 7 Database Addon – CFDB7” and prevents contact form submissions from being saved if validation fails.
If the token doesn’t exists while submitting or call directly API then the incoming request will be rejected.
You can see how it works on <a href="https://www.sitelint.com/contact" rel="nofollow ugc">SiteLint</a> website.

Spam Prevention for Contact Form 7 and Comments

Spam Prevention for WP Contact Form 7 (manage multiple contact forms) and WordPress Comments.

Prevent Indexing on Non-Live Sites vs Spam Prevention for Contact Form 7 and Comments