| Repository | Description |
|------------|-------------|
| lucasnpinheiro/php-license-manager | Full admin panel + API |
| Hashen110/PHP-License-Key-System | Simple generator & validator |
| mikehaertl/php-pdflib (not license system) – ignore; search for php-license |
Use GitHub search:
php license key system stars:>50
Creating a PHP License Key System: A Step-by-Step Guide
Are you looking to protect your PHP-based software or application from unauthorized use? Implementing a license key system is an effective way to ensure that only legitimate users can access your product. In this blog post, we'll show you how to create a basic PHP license key system using a GitHub repository.
What is a License Key System?
A license key system is a mechanism that verifies the authenticity of a software or application by checking a unique key or code provided by the vendor. This key is usually generated based on specific parameters, such as the user's name, email, or hardware configuration.
Why Use a License Key System?
Implementing a license key system provides several benefits:
PHP License Key System using GitHub
To create a basic PHP license key system, we'll use a GitHub repository as a starting point. Here's a step-by-step guide:
Step 1: Create a GitHub Repository
Create a new GitHub repository for your license key system. You can name it something like "php-license-key-system".
Step 2: Install Required Libraries
In your repository, create a new PHP file (e.g., composer.json) and add the following dependencies:
"require":
"php": "^7.2",
"symfony/console": "^5.2"
Run composer install to install the required libraries. php license key system github install
Step 3: Generate License Keys
Create a new PHP file (e.g., LicenseKeyGenerator.php) and add the following code:
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
class LicenseKeyGenerator extends Command
protected function execute(InputInterface $input, OutputInterface $output)
$userData = [
'name' => 'John Doe',
'email' => 'john.doe@example.com',
];
$licenseKey = md5(serialize($userData));
$output->writeln("License Key: $licenseKey");
// Save the license key to a database or file
This code generates a license key based on user data (e.g., name and email).
Step 4: Validate License Keys
Create another PHP file (e.g., LicenseKeyValidator.php) and add the following code:
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
class LicenseKeyValidator extends Command
protected function execute(InputInterface $input, OutputInterface $output)
$licenseKey = $input->getOption('license-key');
// Retrieve the stored license key data
$storedLicenseKey = ' stored_license_key_data ';
if ($licenseKey === $storedLicenseKey)
$output->writeln('License key is valid');
else
$output->writeln('License key is invalid');
This code validates a provided license key against stored data.
Step 5: Integrate with Your Application
Integrate the license key system with your PHP application by including the LicenseKeyValidator.php file and calling the validate method:
require_once 'LicenseKeyValidator.php';
$validator = new LicenseKeyValidator();
$validator->validate(' provided_license_key ');
Conclusion
In this blog post, we've shown you how to create a basic PHP license key system using a GitHub repository. By following these steps, you can protect your PHP-based software or application from unauthorized use.
Example Use Cases
Future Enhancements
Resources
A PHP license key system typically consists of two parts: a server-side generator to create and track keys and a client-side validator to verify them within your application. Popular GitHub PHP License Key Projects PHP License Key System using GitHub To create
msbatal/PHP-License-Key-Generator: A simple, robust class for generating serial-number-style product keys with custom templates.
keygen-sh/example-php-activation-server: An example implementation using the Keygen.sh API to manage machine fingerprints and floating licenses.
AyrA/Licensing: A free, open-source system designed for both key generation and thorough validation, including gross format violation checks.
cubiclesoft/php-license-server: A high-performance server system for managing multiple products, versions, and software licenses with a dedicated SDK. General Installation and Setup Steps
Installing these systems generally follows a standard procedure:
Clone the Repository: Use Git to bring the project files into your local environment. git clone https://github.com Use code with caution. Copied to clipboard
Environment Setup: Most PHP projects require a local server like XAMPP. Place the cloned folder into the htdocs directory to make it accessible via localhost.
Database Configuration: If the system includes an .sql file, you must create a database in phpMyAdmin and import that file to set up the necessary tables for tracking keys. Integration:
Generator: To create a key, you typically include the generator class and call its main function (e.g., $license->generate()).
Validator: Place the validation script (often requiring curl for remote checks) into your application's entry point to verify the user's key against your server. Implementation Example (SunLicense)
For a simple local generator like SunLicense, you can get started quickly with these code snippets: PHP-based Software License Server - GitHub
Now that the server is set up, you need your software to check the license. The GitHub repository should provide a client script. Here is a typical API Validation Endpoint.
Create a validate.php file in your project root (the protected software):
<?php header('Content-Type: application/json');if ($_SERVER['REQUEST_METHOD'] !== 'POST') http_response_code(405); exit(json_encode(['valid' => false, 'message' => 'Method not allowed'])); "require": "php": "^7
$input = json_decode(file_get_contents('php://input'), true); $license_key = $input['key'] ?? null; $domain = $_SERVER['SERVER_NAME'];
if (!$license_key) exit(json_encode(['valid' => false, 'message' => 'License key required']));
// Call your central license server (the GitHub system you installed) $ch = curl_init('https://license-server.com/api/verify'); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_POST, true); curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode(['key' => $license_key, 'domain' => $domain])); curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
$response = curl_exec($ch); $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE); curl_close($ch);
if ($http_code === 200) $data = json_decode($response, true); if ($data['valid']) // License is good - store in session/cache session_start(); $_SESSION['license_valid'] = true; echo json_encode(['success' => true]); else echo json_encode(['error' => $data['message']]); else echo json_encode(['error' => 'License server unreachable']);
Create install.php:
<?php // Download latest license system $repo = "https://github.com/varunpathak/LicenseCraft/archive/main.zip"; file_put_contents('license.zip', fopen($repo, 'r')); $zip = new ZipArchive; $zip->open('license.zip'); $zip->extractTo(__DIR__); $zip->close(); unlink('license.zip');
// Setup database $config = [ 'db_host' => 'localhost', 'db_name' => 'licenses', 'db_user' => 'root', 'db_pass' => '' ]; file_put_contents('config.php', '<?php return ' . var_export($config, true) . ';');
In the world of commercial software, protecting your code and managing user access is paramount. Whether you are developing a SaaS script, a WordPress plugin, a desktop application with a PHP backend, or a membership platform, you need a robust License Key System.
While building one from scratch is possible (hashing algorithms, database management, expiration checks), it is often smarter to leverage open-source solutions. GitHub is a treasure trove of PHP license systems. This guide will walk you through everything you need to know about selecting, installing, and configuring a PHP license key system sourced from GitHub.
Before you clone any repository, ensure your environment meets these requirements:
Quick check: Run php -v and composer --version on your server.
If the project has a composer.json file:
composer install
If no Composer, ensure required extensions are enabled (PDO, openssl, json).