How does Really Simple CAPTCHA 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. 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 Really Simple CAPTCHA with your plugin?

First, create an instance of ReallySimpleCaptcha class: $captcha_instance = new ReallySimpleCaptcha(); You can change the instance variables as you wish. 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 = mt_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 );

Is Really Simple CAPTCHA secure?

Really Simple CAPTCHA is not strongly secure. If you need perfect security, you should try other solutions.

What is the purpose of Really Simple CAPTCHA?

Really Simple CAPTCHA is intended to work with other plugins. It is originally created for Contact Form 7, however, you can use it with your own plugin.

Where can I see a live sample of Really Simple CAPTCHA?

If you wish to see a live sample of Really Simple CAPTCHA, you can try Contact Form 7.

WordPress Plugin Really Simple CAPTCHA

Features Download’s trend Changelog Reviews

Easy Integration

Works seamlessly with other plugins, including Contact Form 7.

Simple and Lightweight

No need for PHP "Sessions", just temporary files for storing states.

Customizable Design

Change the background color of CAPTCHA image to match your website.

Reliable Security

Generates random word CAPTCHA and checks the correctness of the answer, blocking non-human respondents.

Author’s Site

2.3

Bumps up the minimum required WordPress version to 6.4.

2.2

Bumps up the minimum required WordPress version to 6.1.
Bumps up the minimum required PHP version to 7.4.
Replaces ReallySimpleCaptcha::normalize_path() with wp_normalize_path().
Updates Apache directives.

Good Simple Banner

By nicolasvsedeco on October 25, 2023

Helo, very simple banner for cookies but there is a little bug. The banner Cookies are shown in Widgets page.

Bad and not work to stabilite

By gurcantet on April 11, 2023

spam is continue to come...

test

By rahzan on September 16, 2022

c'est quoi ce truc

By laurentino7 on January 21, 2022

jamais vu une merde pareille !

Great work - easy to implement

By Blackbam on December 17, 2021

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!

perfect

By wonadoomore on January 21, 2021

Worked great for me a a simple solution to annoying emails. looked good

Spam keep comming!

By athinaok on January 16, 2021

Plug in is lack of templates and spam is continue to come...

Very helpful captcha

By gertrudew on November 18, 2020

Captcha so helpful as a tool for the spam protection. This plugin do everything what I'm looking for.

It's really simple but really don't work

By vlkplk on July 24, 2020

All set as should be, but after writing message I can send the message without captcha. It's there but without any function. Mailbots has no obstacle. I don't want miracles for free but at least some efect wooul be great.

Not efficient

By nolyann on October 17, 2019

This plugin is stable and handy to use, but not efficient, as its author says itself. I recommend not to select this captcha solution.

More Reviews

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Wordfence Login Security

Secure your website with Wordfence Login Security, providing two-factor authentication, login and registration CAPTCHA, and XML-RPC protection.

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Really Simple CAPTCHA

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

Try Demo

Screenshots

Author Site

Really Simple CAPTCHA

400000+

Apr 02, 2024

6.4 or higher

6.5.2

Easy Integration

Works seamlessly with other plugins, including Contact Form 7.

Simple and Lightweight

No need for PHP "Sessions", just temporary files for storing states.

Customizable Design

Change the background color of CAPTCHA image to match your website.

Reliable Security

Generates random word CAPTCHA and checks the correctness of the answer, blocking non-human respondents.

2.3

2.2

Good Simple Banner

Bad and not work to stabilite

test

c'est quoi ce truc

Great work - easy to implement

perfect

Spam keep comming!

Very helpful captcha

It's really simple but really don't work

Not efficient

Try other plugins too!

Add CAPTCHA to Contact Form 7

Secure your website with Wordfence Login Security, providing two-factor authentication, login and registration CAPTCHA, and XML-RPC protection.

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

Screenshots

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