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Example code of forutan/fcaptcha

Informations about the package fcaptcha

📦 Install via Packagist
🐙 View source on GitHub

🛡️ FCaptcha — Laravel Image-Based CAPTCHA

A secure, modular, image-based CAPTCHA for Laravel with cryptographic protection and multi-context support (login, checkout, etc.). Effectively prevents automated spam in production forms.

Table of Contents 📚

Features

Requirements

To use the fcaptcha:prepare-images command, ImageMagick must be installed and available in your system's PATH:

You can verify the installation using:

Installation

Install via Composer:

Publish the config file (this will copy the default settings to config/fcaptcha.php):

Prepare CAPTCHA Images

FCaptcha requires categorized images to generate visual CAPTCHAs. You can prepare your image set using one of these four methods (in order of priority):

📁 Required Folder Structure (All Methods)

No matter which method you choose — whether a custom path, config value, built-in demo set, or published assets — the images folder must follow this categorized layout:

➊ Method 1: Custom folder path (CLI flag)

Pass the images folder path directly via --from:

➋ Method 2: Path via Config

Set your path in config/fcaptcha.php like this:

Then run:

➌ Method 3: Use Built-in Demo Images

If you don't specify --from and leave image_seed_path as null (in config/fcaptcha.php ), FCaptcha will automatically use the built-in demo images from:

In this case, just run:

➍ Method 4: Customize Built-in Images

To use and modify the internal demo set:

⚠️ Important: After modifying your image set or resetting the database, you must re-run the image preparation command to sync the new data.

🎉 FCaptcha is now ready to power your Laravel forms with strong, customizable CAPTCHA protection.
Enjoy secure, bot-resistant interactions — right out of the box 💻🛡️

Middleware Usage

Apply fcaptcha.verified:{context} middleware to any route.

Example: single route

Example: group of routes

Each context is verified separately.

Configuration

FCaptcha comes with customizable UI and behavior. You can tweak both via Blade views and config values.

🖌️ Customize the CAPTCHA UI

Publish the default Blade view:

Edit the files under:

You can modify layout, texts, styles, or add your own branding.

🛠️ Change Behavior & Limits

Configuration file is located at config/fcaptcha.php. It controls core behavior of FCaptcha — including image sizes, retry limits, category logic, and redirect behavior.

Key options:

Probability of Random Success

The probability of randomly solving the CAPTCHA (by pure guessing) is shown below:

🎯 Formula:
P = 1 / C(n, k)
where n = total images and k = required correct selections

Correct Images (k) Combinations (C(12, k)) Probability
3 220 ~0.45%
4 495 ~0.20%
5 792 ~0.13%
6 924 ~0.11%

Average success chance: < 0.4% — providing strong protection against bots.

Contributing

Have ideas for improvements? Found a bug?
Pull requests and issues are warmly welcome — let's make FCaptcha even better together!

Support

If you find FCaptcha helpful:

👉 Donate here

Commercial License

This project is licensed under a custom non-commercial license. Usage is permitted only for personal and academic purposes. Commercial use of any kind is strictly prohibited. For commercial inquiries, please contact:

👉 Request license

All versions of fcaptcha with dependencies

PHP Build Version
Package Version
Requires php Version ^8.1
illuminate/support Version ^9.0|^10.0|^11.0|^12.0
illuminate/routing Version ^9.0|^10.0|^11.0|^12.0
illuminate/http Version ^9.0|^10.0|^11.0|^12.0
illuminate/database Version ^9.0|^10.0|^11.0|^12.0
illuminate/console Version ^9.0|^10.0|^11.0|^12.0
Composer command for our command line client (download client) This client runs in each environment. You don't need a specific PHP version etc. The first 20 API calls are free. Standard composer command

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