Title: Mathematical Captcha Applier
Author: samiur6688
Published: <strong>Séptémber 15, 2025</strong>
Last modified: Méi 27, 2026

---

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![](https://ps.w.org/mathematical-captcha-applier/assets/icon-256x256.png?rev=3389368)

# Mathematical Captcha Applier

 By [samiur6688](https://profiles.wordpress.org/samiur6688/)

[Download](https://downloads.wordpress.org/plugin/mathematical-captcha-applier.1.0.1.zip)

 * [Details](https://su.wordpress.org/plugins/mathematical-captcha-applier/#description)
 * [Reviews](https://su.wordpress.org/plugins/mathematical-captcha-applier/#reviews)
 *  [Installation](https://su.wordpress.org/plugins/mathematical-captcha-applier/#installation)
 * [Development](https://su.wordpress.org/plugins/mathematical-captcha-applier/#developers)

 [Support](https://wordpress.org/support/plugin/mathematical-captcha-applier/)

## Description

**Mathematical Captcha Applier** is a lightweight WordPress plugin that lets you
easily apply a simple math-based captcha to form submit buttons on your website 
by specifying their CSS selector. Just provide a specific button’s CSS selector,
and the plugin will display a captcha prompt before the action is completed. This
could help to prevent spam and unwanted bot activity.

**Features:**
 – Add a mathematical captcha to form submit buttons (`<input type
="submit">` or `<button type="submit">`) by specifying their CSS selector (ID or
class). – Attempts to protect forms from automated submissions. – No external dependencies—
lightweight and fast. – Simple configuration via the WordPress dashboard. – If JavaScript
is disabled, this plugin will hide the selected buttons.

**How It Works:**
 When a user clicks the protected button, a small popup will appear
asking them to solve a basic math problem (e.g., `5 + 3 = ?`). If answered correctly,
the action will proceed.

If JavaScript is disabled in the browser, the plugin hides the selected submit button.

## Installation

 1. Upload the plugin files to the `/wp-content/plugins/mathematical-captcha-applier`
    directory, or install the plugin through the WordPress **Plugins** screen.
 2. Activate the plugin through the **Plugins** screen in WordPress.
 3. Go to **Settings > Mathematical Captcha Applier** to configure the buttons you 
    want to protect.

## FAQ

### Does this work with all forms?

Yes, as long as the submit button is either `<input type="submit">` or `<button 
type="submit">` and you specify its unique class or ID as the selector.

### Can I protect multiple buttons?

Yes, you can specify multiple selectors in the settings.

### Does it require JavaScript?

Yes, the captcha popup and validation rely on JavaScript.

### Is this plugin designed to handle all kinds of spamming threats?

No. This plugin is not designed to handle all types of spamming threats. It attempts
to stop spamming attempts by using a CSS and JS based method.

### Is it possible to include `input[type=”submit”]` or `button[type=”submit”]` as a selector?

No. Only specific selectors based on **ID or class** are allowed. Global selectors
like `input[type="submit"]` and `button[type="submit"]` are blocked.

## Reviews

There are no reviews for this plugin.

## Contributors & Developers

“Mathematical Captcha Applier” is open source software. The following people have
contributed to this plugin.

Contributors

 *   [ samiur6688 ](https://profiles.wordpress.org/samiur6688/)

[Translate “Mathematical Captcha Applier” into your language.](https://translate.wordpress.org/projects/wp-plugins/mathematical-captcha-applier)

### Interested in development?

[Browse the code](https://plugins.trac.wordpress.org/browser/mathematical-captcha-applier/),
check out the [SVN repository](https://plugins.svn.wordpress.org/mathematical-captcha-applier/),
or subscribe to the [development log](https://plugins.trac.wordpress.org/log/mathematical-captcha-applier/)
by [RSS](https://plugins.trac.wordpress.org/log/mathematical-captcha-applier/?limit=100&mode=stop_on_copy&format=rss).

## Changelog

#### 1.0

 * Initial release

#### 1.0.1

 * Updated “Tested up to” version.
 * Improved plugin code to follow WordPress coding standards.
 * Updated language file name.

## Meta

 *  Version **1.0.1**
 *  Last updated **1 month ago**
 *  Active installations **Fewer than 10**
 *  WordPress version ** 5.6 or higher **
 *  Tested up to **7.0**
 *  PHP version ** 7.4 or higher **
 *  Language
 * [English (US)](https://wordpress.org/plugins/mathematical-captcha-applier/)
 * Tags
 * [anti-spam](https://su.wordpress.org/plugins/tags/anti-spam/)[captcha](https://su.wordpress.org/plugins/tags/captcha/)
   [form security](https://su.wordpress.org/plugins/tags/form-security/)[math captcha](https://su.wordpress.org/plugins/tags/math-captcha/)
   [spam protection](https://su.wordpress.org/plugins/tags/spam-protection/)
 *  [Advanced View](https://su.wordpress.org/plugins/mathematical-captcha-applier/advanced/)

## Ratings

No reviews have been submitted yet.

[Your review](https://wordpress.org/support/plugin/mathematical-captcha-applier/reviews/#new-post)

[See all reviews](https://wordpress.org/support/plugin/mathematical-captcha-applier/reviews/)

## Contributors

 *   [ samiur6688 ](https://profiles.wordpress.org/samiur6688/)

## Support

Got something to say? Need help?

 [View support forum](https://wordpress.org/support/plugin/mathematical-captcha-applier/)