Takayuki Miyoshi

<p>Really Simple CAPTCHA does not work alone and is intended to work with other plugins. It is originally created for <a href="https://contactform7.com/" rel="nofollow ugc">Contact Form 7</a>, however, you can use it with your own plugin.</p>
<p>Note: This product is “really simple” as its name suggests, i.e., it is not strongly secure. If you need perfect security, you should try other solutions.</p>
<h4>How does it work?</h4>
<p>Really Simple CAPTCHA does not use PHP “Sessions” for storing states, unlike many other PHP CAPTCHA solutions, but stores them as temporary files. This allows you to embed it into WordPress without worrying about conflicts.</p>
<p>When you generate a CAPTCHA, Really Simple CAPTCHA creates two files for it; one is an image file of CAPTCHA, and the other is a text file which stores the correct answer to the CAPTCHA.</p>
<p>The two files have the same (random) prefix in their file names, for example, “a7hk3ux8p.png” and “a7hk3ux8p.txt.” In this case, for example, when the respondent answers “K5GF” as an answer to the “a7hk3ux8p.png” image, then Really Simple CAPTCHA calculates hash of “K5GF” and tests it against the hash stored in the “a7hk3ux8p.txt” file. If the two match, the answer is confirmed as correct.</p>
<h4>How to use with your plugin</h4>
<p>Note: Below are instructions for plugin developers.</p>
<p>First, create an instance of ReallySimpleCaptcha class:</p>
<pre><code>$captcha_instance = new ReallySimpleCaptcha();
</code></pre>
<p>You can change the instance variables as you wish.</p>
<pre><code>// Change the background color of CAPTCHA image to black
$captcha_instance->bg = array( 0, 0, 0 );
</code></pre>
<p>See really-simple-captcha.php if you are interested in other variables.</p>
<p>Generate a random word for CAPTCHA.</p>
<pre><code>$word = $captcha_instance->generate_random_word();
</code></pre>
<p>Generate an image file and a corresponding text file in the temporary directory.</p>
<pre><code>$prefix = wp_rand();
$captcha_instance->generate_image( $prefix, $word );
</code></pre>
<p>Then, show the image and get an answer from respondent.</p>
<p>Check the correctness of the answer.</p>
<pre><code>$correct = $captcha_instance->check( $prefix, $the_answer_from_respondent );
</code></pre>
<p>If the $correct is true, go ahead. Otherwise, block the respondent — as it would appear not to be human.</p>
<p>And last, remove the temporary image and text files, as they are no longer in use.</p>
<pre><code>$captcha_instance->remove( $prefix );
</code></pre>
<p>That’s all.</p>
<p>If you wish to see a live sample of this, you can try <a href="https://contactform7.com/captcha/" rel="nofollow ugc">Contact Form 7</a>.</p>


Really Simple CAPTCHA

Needed this for an installation with custom forms. I used the plugin developers instructions and was able to make a fully custom implementation based on server side validation within 30 minutes. No more spam bots misusing the forms. Thank you!

Great work - easy to implement

Really Simple CAPTCHA is a CAPTCHA module intended to be called from other plugins. It is originally created for my Contact Form 7 plugin.

yonifre

WpMaspik

<p>No more fake leads and bot submissions – Every email will be real and valuable, Spam block guarantee!<br />
<strong>Lets bring back the excitement</strong> of getting new leads.</p>
<h3>Why to block spam with Maspik?</h3>
<ul>
<li>🚀 <strong>Works immediately</strong>: Works when you activate the plugin</li>
<li>🎯 <strong>High Success Rate</strong>: Better protection than traditional CAPTCHA</li>
<li>🔍 <strong>Smart Detection</strong>: Identifies spam patterns automatically</li>
<li>🌐 <strong>Wide Compatibility</strong>: Works with all major form plugins and registration forms</li>
<li>🛠️ <strong>Fully Customizable</strong>: Adapt to your specific needs you can block any spam you want with Blacklist system</li>
<li>👥 <strong>Spam Block Guarantee</strong>: We are committed to help you to block spam, See <a href="#spam-block-guarantee" rel="nofollow ugc">Spam Block Guarantee</a> paragraph.</li>
</ul>
<h3>Key Features</h3>
<p>✅ Works instantly with popular form plugins and registration forms<br />
✅ No CAPTCHA needed<br />
✅ Smart blacklist system, block any word that you want, if exist in the submission, it will be blocked.<br />
✅ IP blacklist & API integrations<br />
✅ Phone number validation<br />
✅ Several methods to block spam with advanced honeypot fields<br />
✅ Multi-language support<br />
✅ AI spam check – Enable it from the Maspik settings page.</p>
<h3>Detailed Features: Our Advanced Spam Protection & Filtering</h3>
<ul>
<li><strong>Blacklisting by Field Type:</strong>
<ul>
<li>Text fields (Name/Subject)</li>
<li>Email fields (supports regex/wildcard patterns)</li>
<li>Text area fields</li>
<li>Phone number verification with regex/wildcard format</li>
</ul>
</li>
<li><strong>Blocking:</strong>
<ul>
<li>Specific IP addresses</li>
<li>Spam submissions in WordPress comments/registration/contact forms</li>
<li>Option to block submissions with emojis in textarea fields</li>
</ul>
</li>
<li><strong>Advance Blocking:</strong>
<ul>
<li>Honeypot</li>
<li>IP verification (100 checks/month)</li>
<li>Block submissions post by bot</li>
<li>Advance key check </li>
<li>AI spam check (Free for all users) with Google Gemini, OpenAI, and Mistral AI</li>
</ul>
</li>
<li><strong>Character Control:</strong>
<ul>
<li>Maximum number of characters in text fields</li>
<li>Maximum number of characters in text area fields</li>
</ul>
</li>
<li><strong>Link Limitation:</strong>
<ul>
<li>Limit the number of links allowed in text areas (ideally 0)</li>
</ul>
</li>
<li><strong>API Integrations:</strong>
<ul>
<li>Proxycheck.io (check IP address against proxy/VPN/TOR)</li>
<li>AbuseIPDB.com (check IP address against abuse/spam/malicious/proxy/VPN/TOR)</li>
<li>Numverify.com (validate phone number to block spam phone numbers)</li>
</ul>
</li>
<li><strong>Spam Log:</strong>
<ul>
<li>Review blocked submissions</li>
<li>understand way spam being blocked</li>
</ul>
</li>
<li><strong>Detailed Statistics:</strong>
<ul>
<li>Track blocked spam</li>
<li>Analyze patterns</li>
<li>Monitor protection</li>
<li>Advanced spam statistics dashboard</li>
</ul>
</li>
</ul>
<h3>Supported Forms</h3>
<p>Maspik integrates seamlessly with a wide range of popular contact forms and comments:</p>
<ul>
<li>Elementor forms</li>
<li>Contact Form 7</li>
<li>Hello Plus</li>
<li>NinjaForms</li>
<li>Everest Forms</li>
<li>Formidable forms</li>
<li>JetFormBuilder</li>
<li>Forminator forms</li>
<li>Fluentforms</li>
<li>Bricksbuilder forms</li>
<li>Breakdance Builder forms</li>
<li>BuddyPress</li>
<li>Bitforms</li>
<li>Metform</li>
<li>WordPress comments</li>
<li>WordPress registration form</li>
<li>Custom PHP forms</li>
<li>WPForms*</li>
<li>GravityForms*</li>
<li>WooCommerce registration form*</li>
<li>WooCommerce review*</li>
</ul>
<p>(*) Pro license required</p>
<h3>We offer also a Pro version!</h3>
<h3>Pro Version Features 🌟</h3>
<p>⭐ Advanced IP verification (10,000 checks/month)<br />
⭐ Custom spam dashboard for multiple sites, manage your spam settings from one place<br />
⭐ Country-based filtering, allow you to block spam by country, or allow only specific country<br />
⭐ Language-based filtering, allow you to block spam by language, or allow only specific language<br />
⭐ Settings Import/Export<br />
⭐ Premium support</p>
<h3>Important Note</h3>
<p>Be cautious when selecting words to blacklist as each website has different needs. For example, if you’re a digital marketing agency and blacklist the word “SEO,” you may lose some valid leads.<br />
The plugin is provided “as is” and the user assumes full responsibility for configuring and using it appropriately for their specific needs.</p>
<p>The plugin is GDPR compliant.</p>
<h3>Support & Community</h3>
<ul>
<li>🚀 <a href="https://wpmaspik.com/documentation/getting-started/?readme-file" rel="nofollow ugc">Get Started guide</a></li>
<li>📚 <a href="https://wpmaspik.com/documentation/?readme-file" rel="nofollow ugc">Documentation</a></li>
<li>💬 <a href="https://www.facebook.com/groups/maspik" rel="nofollow ugc">Community Forum</a></li>
<li>🐛 <a href="https://wpmaspik.com/#support?readme-file" rel="nofollow ugc">Report Issues</a></li>
<li>💡 <a href="https://wpmaspik.com/#support?readme-file" rel="nofollow ugc">Feature Requests</a></li>
<li>💰 <a href="https://wpmaspik.com/get-maspik-pro-for-free-share-your-expertise/?readme-file" rel="nofollow ugc">Recive Pro for free</a></li>
<li>💖 <a href="https://wordpress.org/support/plugin/contact-forms-anti-spam/reviews/#new-post" rel="ugc">Support us with 5 stars review</a></li>
<li>💎 <a href="https://paypal.me/yonifre" rel="nofollow ugc">Donate to support our work</a></li>
<li>✨ <a href="https://wpmaspik.com/?readme-file" rel="nofollow ugc">WP Maspik</a></li>
</ul>
<h3>🛡️ Spam Block Guarantee – for all users!</h3>
<p>We stand behind our protection! If spam is getting through your forms, Our team is here to help and guide you to block the spam.</p>
<h3>Getting Help is Easy:</h3>
<ol>
<li>Join our <a href="https://www.facebook.com/groups/maspik" rel="nofollow ugc">Community Forum</a></li>
<li>Create a new post with:
<ul>
<li>Your website URL and form page URL (optional)</li>
<li>Description of the spam you’re receiving, attach the spam submission screenshot or text</li>
<li>Your Maspik version</li>
<li>Screenshot or export of your current spam settings</li>
</ul>
</li>
</ol>
<p>Our team will guide you to block the spam effectively!</p>
<h3>Getting Started 🚀</h3>
<ol>
<li>
<p><strong>Installation</strong></p>
<ul>
<li>Search for “Maspik” in WordPress plugins</li>
<li>Click Install & Activate </li>
</ul>
</li>
<li>
<p><strong>Basic Setup</strong></p>
<ul>
<li>Go to Maspik Settings</li>
<li>Enable desired protections</li>
<li>Save changes</li>
</ul>
</li>
<li>
<p><strong>Advanced Configuration</strong> (Optional)</p>
<ul>
<li>Add custom spam phrases</li>
<li>Toggle relevant settings for each field type</li>
<li>Set up phone validation</li>
</ul>
</li>
<li>
<p><strong>Playground</strong></p>
<ul>
<li>Test your settings with the playground form and in the live form</li>
<li>Check the spam log to see if spam is being blocked</li>
</ul>
</li>
</ol>


Maspik – Ultimate Spam Protection


Easily the best solution for fighting spam. Their support is top notch as well.


Excellent solution

🛡️ No more fake leads, and unwanted spam - Every email will be real and valuable (For all Contact-forms/Comments and Registration forms).

Really Simple CAPTCHA vs Maspik – Ultimate Spam Protection