Really Simple CAPTCHA

Really Simple CAPTCHA

Wordpress plugin

Install on Wordpress

App Details

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.

Pricing

Starting from $0 per month.

Check Out the Facebook Feed Widget

By Common Ninja

Facebook FeedTry For Free!

App Info

Rating

Reviewers

126 reviews

Tags

captcha

Developed By

Takayuki Miyoshi

Quick & Easy

Find the Best Wordpress plugins for you

Common Ninja has a large selection of powerful Wordpress plugins that are easy to use, fully customizable, mobile-friendly and rich with features — so be sure to check them out!

Testimonial

Testimonial plugins for Wordpress

Contact Form

Contact Form plugins for Wordpress

Maps

Maps plugins for Wordpress

Translation

Translation plugins for Wordpress

Chat

Chat plugins for Wordpress

Slider

Slider plugins for Wordpress

Reviews

Reviews plugins for Wordpress

Contact

Contact plugins for Wordpress

Galleries

Galleries plugins for Wordpress

SEO

SEO plugins for Wordpress

Forms

Forms plugins for Wordpress

Comments

Comments plugins for Wordpress

Backup

Backup plugins for Wordpress

Privacy

Privacy plugins for Wordpress

Optimize

Optimize plugins for Wordpress

Tabs

Tabs plugins for Wordpress

Social Sharing

Social Sharing plugins for Wordpress

Events Calendar

Events Calendar plugins for Wordpress

Comments

Comments plugins for Wordpress

Social Feeds

Social Feeds plugins for Wordpress

Social Sharing

Social Sharing plugins for Wordpress

Portfolio

Portfolio plugins for Wordpress

Video Player

Video Player plugins for Wordpress

popup

popup plugins for Wordpress

SiteMap

SiteMap plugins for Wordpress

Payment

Payment plugins for Wordpress

Coming Soon

Coming Soon plugins for Wordpress

Inventory

Inventory plugins for Wordpress

Testimonials

Testimonials plugins for Wordpress

Portfolio

Portfolio plugins for Wordpress

Membership

Membership plugins for Wordpress

Forms

Forms plugins for Wordpress

Analytics

Analytics plugins for Wordpress

Events Calendar

Events Calendar plugins for Wordpress

Sliders

Sliders plugins for Wordpress

Analytics

Analytics plugins for Wordpress

Reviews

Reviews plugins for Wordpress

Security

Security plugins for Wordpress

Ads

Ads plugins for Wordpress

Music Player

Music Player plugins for Wordpress

Countdown

Countdown plugins for Wordpress

Email Marketing

Email Marketing plugins for Wordpress

Membership

Membership plugins for Wordpress

Ecommerce

Ecommerce plugins for Wordpress

Customer Support

Customer Support plugins for Wordpress

Video Player

Video Player plugins for Wordpress

Tabs

Tabs plugins for Wordpress

Social Feeds

Social Feeds plugins for Wordpress

Common Ninja Apps

Some of the best Common Ninja plugins for Wordpress

Browse our extensive collection of compatible plugins, and easily embed them on any website, blog, online store, e-commerce platform, or site builder.

Facebook Feed for Wordpress logo

Facebook Feed

Show Facebook posts in a live Facebook feed that keeps content fresh, boosts social proof, and helps visitors engage more with your brand.

Wake Up Notifications for Wordpress logo

Wake Up Notifications

Use wake up notifications to re engage visitors with custom alerts that capture attention, boost interaction, and help increase conversions across your site.

Medium Feed for Wordpress logo

Medium Feed

Show Medium articles in a Medium feed that keeps content fresh, improves readability, and helps visitors discover more posts.

AdBlocker Detector for Wordpress logo

AdBlocker Detector

Detect ad blockers on your site to maintain visibility into user behavior and support sustainable ad-based monetization.

Flip Cards for Wordpress logo

Flip Cards

Use flip cards to present information interactively, improve visual design, and guide visitors toward clearer decisions that support conversions.

Coupon Popup for Wordpress logo

Coupon Popup

Use a coupon popup to highlight special offers, capture email leads, reduce cart abandonment, and turn more visitors into paying customers.

Social Media Links for Wordpress logo

Social Media Links

Use social media links with sticky buttons that keep your profiles visible, boost engagement, and help promote your content more effectively across your site.

3D Cards for Wordpress logo

3D Cards

3D cards that highlight important information with depth and motion, capture attention instantly, and help visitors navigate content more effectively.

Corner Button for Wordpress logo

Corner Button

Corner button that stays fixed on the screen to highlight promotions, improve navigation, and guide visitors toward important actions with clear visibility.

Section Builder for Wordpress logo

Section Builder

Create structured layouts with a section builder that lets you design custom website sections, customize styles, and organize content for a clearer user experience.

Twitch Feed for Wordpress logo

Twitch Feed

Show live streams and clips with a Twitch feed that keeps content fresh, boosts engagement, and helps visitors follow your channel more easily.

Cookies Consent Bar for Wordpress logo

Cookies Consent Bar

Display a cookies consent bar that explains usage and supports GDPR compliance, enhancing user trust and legal clarity.

More plugins

plugins You Might Like

Discover Apps By Platform

Discover the best apps for your website

WordPress
Wix
Shopify
Weebly
Webflow
Joomla
PrestaShop
Shift4Shop
WebsiteX5
MODX
Opencart
NopCommerce

Common Ninja Search Engine

The Common Ninja Search Engine platform helps website builders find the best site widgets, apps, plugins, tools, add-ons, and extensions! Compatible with all major website building platforms - big or small - and updated regularly, our Search Engine tool provides you with the business tools your site needs!

Multiple platforms