Really Simple CAPTCHA vs Prosopo Procaptcha

Really Simple CAPTCHA does not work alone and is intended to work with other plugins. It is originally created for Contact Form 7, however, you can use it with your own plugin. 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. How does it work? 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. 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. 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. How to use with your plugin Note: Below are instructions for plugin developers. First, create an instance of ReallySimpleCaptcha class: $captcha_instance = new ReallySimpleCaptcha(); You can change the instance variables as you wish. // Change the background color of CAPTCHA image to black $captcha_instance->bg = array( 0, 0, 0 ); See really-simple-captcha.php if you are interested in other variables. Generate a random word for CAPTCHA. $word = $captcha_instance->generate_random_word(); Generate an image file and a corresponding text file in the temporary directory. $prefix = wp_rand(); $captcha_instance->generate_image( $prefix, $word ); Then, show the image and get an answer from respondent. Check the correctness of the answer. $correct = $captcha_instance->check( $prefix, $the_answer_from_respondent ); If the $correct is true, go ahead. Otherwise, block the respondent — as it would appear not to be human. And last, remove the temporary image and text files, as they are no longer in use. $captcha_instance->remove( $prefix ); That’s all. If you wish to see a live sample of this, you can try Contact Form 7.

Prosopo Procaptcha is a GDPR-compliant, privacy-first CAPTCHA solution, offering seamless bot protection without compromising user data. Key Features of Procaptcha Private & GDPR Friendly – No data storage ensures full compliance with privacy laws. Seamless Integration – A drop-in replacement for reCaptcha and hCaptcha, allowing setup within minutes. Customizable Defense – Easily adjust bot protection settings to meet your site’s specific needs. Affordable – Enjoy a top-value CAPTCHA solution with a generous free tier. Why Use Procaptcha in WordPress? Official WordPress Plugin – Specifically built for WordPress, ensuring secure and reliable integration. Multiple Built-In Integrations – Works seamlessly with core WordPress forms and popular form plugins. Supported list provided below. Multilingual – Completely translated into German (DE), Spanish (ES), French (FR), Italian (IT), and Portuguese (PT). Documentation – Plugin documentation is available to help you get the most out of the plugin. Third-Party Service Notice For proper functionality, the plugin loads the Prosopo Procaptcha JavaScript on your chosen forms to display the CAPTCHA on the client side. Upon form submission, the plugin communicates with the Prosopo Procaptcha API server-side to verify the CAPTCHA response. Please review the Prosopo Privacy Policy and Terms and Conditions to fully understand data handling practices. Supported forms Form Plugins: Contact Form 7 – Add the [prosopo_procaptcha] field to your form. Everest Forms – Add the Prosopo Procaptcha field to your form (the Advanced Fields group). Fluent Forms – Add the Prosopo Procaptcha field to your form (the Advanced Fields group). Formidable Forms – Add the Prosopo Procaptcha field to your form. Gravity Forms – Add the Prosopo Procaptcha field to your form (the Advanced Fields group). Ninja Forms – Add the Prosopo Procaptcha field to your form (the Miscellaneous group). User Registration – Add the Prosopo Procaptcha field to your form (the Extra Fields group). WP Forms – Add the Prosopo Procaptcha field to your form (the Standard Fields group). WordPress Core Forms: Login Registration Lost Password Comments Post/Page password protection Visit the plugin settings to enable protection for these forms. Account Plugins: The Procaptcha plugin is officially compatible with the following plugins, that extend the WordPress account features: Security: 1. All-In-One Security (Hide backend feature) 2. LWS Hide Login (Hide backend feature) 3. Login With Ajax (AJAXify Login Forms feature) 4. Security Optimizer (Hide backend feature) 5. Solid Security (Hide backend feature) 6. WPS Hide Login Branding: 1. Branda White Labeling 2. Custom Login 3. Login Customizer 4. Login Designer 5. Login Page Customizer by Colorlib 6. Loginpress 7. Theme My Login 8. Ultimate Dashboard 9. White label 10. YITH Custom Login Account-related: 1. Simple Membership 2. User Registration 3. Memberpress – Login, Reset password: via Procaptcha plugin settings -> Core forms. Membership register – via on-membership settings While only the items above are tested, overall, the Procaptcha plugin supports all the plugins with custom account forms that use the native WordPress account hooks. Other Integrations: BBPress – Account forms from the shortcodes; Forum forms: Open the target forum settings to enable topic and reply forms protection. Elementor Pro – Form widgets: use the Prosopo Procaptcha field. Login widgets: use the Prosopo Procaptcha checkbox in the Form Fields tab (Login must be enabled in the Procaptcha plugin settings->Core forms). JetPack (Forms) – Gutenberg form block: Add the Group block with the prosopo_procaptcha shortcode inside the target form block. WooCommerce – My Account forms; Classic Checkout, Blocks Checkout, Order Tracking forms: enable protection in the WooCommerce tab of the plugin settings. Spectra – Form block: add hidden input with the prosopo_procaptcha name Beaver Builder – Contact, Subscribe forms: enabled protection in the target form settings; Login form: Procaptcha plugin settings->Core forms. Built-In Integrations: Some of the plugins have Procaptcha support in its core, so you don’t need this plugin to use Procaptcha with them: Mailchimp for WordPress Site reviews More integrations coming soon!