GitHub: darkain/php-license-key
One of the oldest and most straightforward implementations. It generates license keys using a cryptographic hash and a secret salt.
Best for: Developers who want to embed key generation into their existing admin area without a full management system.
Repository Focus: david-szabo97/php-license-handler or similar single-file classes.
php-license-key-system/ ├── api/ │ ├── generate.php │ ├── validate.php │ └── status.php ├── database/ │ └── license.sql ├── includes/ │ ├── config.php │ └── License.php ├── examples/ │ ├── client-example.php │ └── admin-generate.php └── README.md
## Installation
git clone https://github.com/yourusername/php-license-key-system.git
</code></pre>
<ol start="2">
<li>
<p>Import <code>database/license.sql</code> into your MySQL database.</p>
</li>
<li>
<p>Update <code>includes/config.php</code> with your database credentials.</p>
</li>
</ol>
<h2>Database Schema</h2>
<pre><code class="language-sql">CREATE TABLE `licenses` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`license_key` varchar(64) NOT NULL,
`product_id` int(11) DEFAULT 1,
`customer_email` varchar(255) DEFAULT NULL,
`domain` varchar(255) DEFAULT NULL,
`expires_on` date DEFAULT NULL,
`status` enum('active','expired','blocked') DEFAULT 'active',
`created_at` timestamp NOT NULL DEFAULT current_timestamp(),
PRIMARY KEY (`id`),
UNIQUE KEY `license_key` (`license_key`)
);
</code></pre>
<h2>API Usage</h2>
<h3>Generate License</h3>
<pre><code>POST /api/generate.php
</code></pre>
<p>Params: <code>product_id</code>, <code>customer_email</code>, <code>expires_days</code>, <code>domain</code></p>
<h3>Validate License</h3>
<pre><code>GET /api/validate.php?license_key=XXXX&domain=example.com
</code></pre>
<p>Response: <code> valid: true, message: "License is active", expires_on: "2025-12-31" </code></p>
<h2>Example Client Code</h2>
<pre><code class="language-php"><?php
$licenseKey = "USER_INPUT_KEY";
$domain = $_SERVER['HTTP_HOST'];
$response = file_get_contents("https://your-server.com/api/validate.php?license_key=$licenseKey&domain=$domain");
$data = json_decode($response, true);
if ($data['valid'])
echo "✅ License valid until " . $data['expires_on'];
else
echo "❌ " . $data['message'];
?>
</code></pre>
<h2>Security Notes</h2>
<ul>
<li>Always validate licenses server-side.</li>
<li>Use HTTPS for API calls.</li>
<li>Hash license keys before storing in DB (we provide <code>hash_hmac</code> example).</li>
<li>Optionally implement IP whitelisting.</li>
</ul>
<h2>License</h2>
<p>MIT – Use freely for personal/commercial projects.</p>
<pre><code>
---
## 🔧 Core PHP Files
### `includes/config.php`
```php
<?php
define('DB_HOST', 'localhost');
define('DB_NAME', 'license_db');
define('DB_USER', 'root');
define('DB_PASS', '');
define('SECRET_KEY', 'your-strong-secret-key-here'); // used for hashing
try
$pdo = new PDO("mysql:host=" . DB_HOST . ";dbname=" . DB_NAME, DB_USER, DB_PASS);
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
catch(PDOException $e)
die("Database connection failed: " . $e->getMessage());
?>
</code></pre>
<h3><code>includes/License.php</code></h3>
<pre><code class="language-php"><?php
class License
private $db;
public function __construct($pdo)
$this->db = $pdo;
public function generate($productId, $email, $expiresDays, $domain = null)
$licenseKey = bin2hex(random_bytes(16)) . '-' . strtoupper(bin2hex(random_bytes(4)));
$expiresOn = date('Y-m-d', strtotime("+$expiresDays days"));
$stmt = $this->db->prepare("INSERT INTO licenses (license_key, product_id, customer_email, domain, expires_on) VALUES (?, ?, ?, ?, ?)");
$stmt->execute([$licenseKey, $productId, $email, $domain, $expiresOn]);
return ['license_key' => $licenseKey, 'expires_on' => $expiresOn];
public function validate($licenseKey, $domain = null)
$stmt = $this->db->prepare("SELECT * FROM licenses WHERE license_key = ?");
$stmt->execute([$licenseKey]);
$license = $stmt->fetch(PDO::FETCH_ASSOC);
if (!$license)
return ['valid' => false, 'message' => 'License key not found'];
if ($license['status'] === 'blocked')
return ['valid' => false, 'message' => 'License key blocked'];
if ($license['expires_on'] < date('Y-m-d'))
return ['valid' => false, 'message' => 'License expired'];
if ($license['domain'] && $license['domain'] !== $domain)
return ['valid' => false, 'message' => 'Invalid domain for this license'];
return [
'valid' => true,
'message' => 'License is active',
'expires_on' => $license['expires_on']
];
?>
</code></pre>
<h3><code>api/generate.php</code></h3>
<pre><code class="language-php"><?php
require_once '../includes/config.php';
require_once '../includes/License.php';
header('Content-Type: application/json');
if ($_SERVER['REQUEST_METHOD'] !== 'POST')
http_response_code(405);
echo json_encode(['error' => 'Method not allowed']);
exit;
$productId = $_POST['product_id'] ?? 1;
$email = $_POST['customer_email'] ?? null;
$expiresDays = $_POST['expires_days'] ?? 365;
$domain = $_POST['domain'] ?? null;
$licenseSys = new License($pdo);
$result = $licenseSys->generate($productId, $email, $expiresDays, $domain);
echo json_encode(['success' => true, 'data' => $result]);
?>
</code></pre>
<h3><code>api/validate.php</code></h3>
<pre><code class="language-php"><?php
require_once '../includes/config.php';
require_once '../includes/License.php';
header('Content-Type: application/json');
$licenseKey = $_GET['license_key'] ?? null;
$domain = $_GET['domain'] ?? null;
if (!$licenseKey)
echo json_encode(['valid' => false, 'message' => 'License key required']);
exit;
$licenseSys = new License($pdo);
$result = $licenseSys->validate($licenseKey, $domain);
echo json_encode($result);
?>
</code></pre>
<hr>
<h2>✅ Next Steps for Your GitHub Repo</h2>
<ol>
<li>Create the repo: <code>php-license-key-system</code></li>
<li>Add the files above</li>
<li>Push to GitHub</li>
<li>Add a <code>LICENSE</code> file (MIT)</li>
<li>Optional: Add a demo GIF or badge for PHP version</li>
</ol>
Implementing a PHP License Key System: A Comprehensive Guide
As a developer, protecting your intellectual property is crucial. One way to achieve this is by implementing a license key system to control access to your software. In this article, we'll explore how to create a PHP license key system using GitHub as a repository for your license keys.
What is a License Key System?
A license key system is a mechanism that validates the authenticity of a software product by checking a unique key against a database of registered keys. This ensures that only authorized users can access and use the software.
Why Use a PHP License Key System?
PHP is a popular server-side scripting language used for web development. Implementing a license key system in PHP provides an additional layer of security and protection for your software products. Here are some benefits:
How to Implement a PHP License Key System
To implement a PHP license key system, you'll need to create a few components:
Using GitHub as a License Key Repository
GitHub provides a secure and scalable platform for storing and managing license keys. Here's how to integrate GitHub with your PHP license key system:
PHP License Key System Example
Here's a basic example of a PHP license key system using GitHub:
// config.php
define('GITHUB_REPO', 'https://api.github.com/repos/your-username/your-repo/contents/license-keys.json');
define('LICENSE_KEY_LENGTH', 32);
// generate_license_key.php
function generateLicenseKey()
$licenseKey = substr(md5(uniqid(mt_rand(), true)), 0, LICENSE_KEY_LENGTH);
return $licenseKey;
// store_license_key.php
function storeLicenseKey($licenseKey)
$ch = curl_init(GITHUB_REPO);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode(['license_key' => $licenseKey]));
$response = curl_exec($ch);
curl_close($ch);
return $response;
// validate_license_key.php
function validateLicenseKey($licenseKey)
$ch = curl_init(GITHUB_REPO);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);
$licenseKeys = json_decode($response, true);
return in_array($licenseKey, $licenseKeys);
Example Use Cases
Here are some example use cases for the PHP license key system: php license key system github
Best Practices
When implementing a PHP license key system, follow these best practices:
Conclusion
Implementing a PHP license key system with GitHub provides a scalable and secure way to protect your software products. By following the guidelines outlined in this article, you can create a comprehensive license key system that ensures only authorized users can access and use your software.
GitHub Repository
You can find an example implementation of the PHP license key system on GitHub:
https://github.com/your-username/php-license-key-system
Additional Resources
For more information on implementing a PHP license key system, check out these resources:
By following the guidelines outlined in this article, you can create a robust and secure PHP license key system using GitHub. Protect your software products and ensure only authorized users can access and use them.
Searching for a "solid" PHP license key system on GitHub generally leads to three main categories: standalone PHP libraries, WordPress-centric managers, and complete self-hosted servers.
Below is a review of the top-performing and most reputable open-source options currently available: 1. Most Robust Features: LicenseGate
LicenseGate is a modern, open-source licensing tool designed for developers who need more than just a key generator.
Key Features: It provides a full REST API and wrapper libraries, allowing you to create and manage keys with ease.
Best For: Developers who want a professional-grade "Licensing as a Service" (LaaS) experience but want to host it themselves.
Verdict: Solid for teams needing scalability and a clean API for multiple products.
2. Best for PHP/WordPress Integration: Software License Manager
Originally a WordPress plugin, this has become a go-to for many PHP developers due to its long-standing stability. GitHub: darkain/php-license-key One of the oldest and most
Key Features: Supports remote activation, deactivation, and status checks through a simple API. It also includes a standalone PHP class for non-WordPress projects.
Best For: Selling plugins, themes, or standalone PHP scripts where you need to track where keys are being used.
Verdict: Highly reliable; the "gold standard" for small-to-medium-scale software distribution. 3. Best Simple Key Generator: PHP-License-Key-Generator
If you don't need a management server and just need to generate secure, formatted keys, this is the most straightforward class.
Key Features: Allows for highly customizable templates (e.g., AA9A9A-AA-99) and prefixing (e.g., SLK-xxxx).
Best For: Simple internal projects or as a building block for your own custom system.
Verdict: Lightweight and effective for generating keys but lacks a built-in verification server. 4. Best Enterprise/Desktop Focus: php-license-manager
This project is unique because it focuses on licensing proprietary desktop applications via a LAMP-based server.
Key Features: Uses public/private key encryption to validate licenses, meaning users don't have to manually enter codes—the software handles it via machine identifiers.
Best For: Distributing compiled applications or desktop software rather than just web scripts.
Verdict: Advanced security model, but it lacks a graphical user interface, making it more difficult to set up. Quick Comparison Table Primary Strength LicenseGate Modern REST API Professional-grade API & wrapper libraries Software License Manager WordPress/PHP Scripts Remote activation & usage tracking PHP-License-Key-Generator Key Generation Simple, custom key formatting (templates) php-license-manager Desktop/Enterprise Public/private key encryption & hardware IDs
Pro Tip: If you want to avoid "reinventing the wheel" for a commercial product, experts often recommend using specialized "Licensing as a Service" (LaaS) providers like Cryptolens or Keygen, as they offer advanced features like offline licensing and piracy protection out of the box. AI responses may include mistakes. Learn more
leonjvr/php-license-manager: Open Source Software ... - GitHub
Summary
What these repos usually include
Strengths
Common weaknesses and risks
Security checklist (what to verify before using) or SaaS applications
When a project might be a good fit
Alternatives and recommendations
Verdict
Related search suggestions
(Note: these search terms can help you find specific projects, tutorials, or security guidance.)
This article explores how to implement or find a PHP license key system using GitHub as a resource. We’ll cover why you’d want one, how to find open-source options on GitHub, and the basic logic behind building your own. Building and Finding a PHP License Key System via GitHub
If you are developing premium PHP plugins, themes, or SaaS applications, protecting your intellectual property is a top priority. A PHP license key system allows you to control who uses your software, manage subscriptions, and prevent unauthorized distribution.
GitHub is the ultimate hub for finding both ready-made libraries and inspiration for building your own licensing logic. Why Use a License Key System?
Revenue Protection: Ensures only paying customers can access full features or updates.
Version Control: Restrict certain features to "Pro" vs "Lite" versions.
Remote Deactivation: Revoke access if a refund is issued or a subscription expires.
Usage Analytics: Track which versions of your software are most popular. Finding Open-Source Solutions on GitHub
Instead of reinventing the wheel, many developers turn to GitHub to find maintained licensing frameworks. When searching for php license key system on GitHub, you will generally find three types of repositories: 1. Client-Side Libraries
These are small PHP scripts you include in your application. They "call home" to a server to verify if a key is valid. Pros: Easy to integrate. Cons: Requires a backend server to handle the requests. 2. Full-Stack Managers
These repositories include both the Server (where you generate keys and manage customers) and the Client (the code that goes into your product).
Search Tip: Look for "Software License Manager" or "WooCommerce License Manager" if you use WordPress. 3. Key Generators
Simple scripts that use algorithms (like Hashids or UUIDs) to create unique, hard-to-guess strings. How a Basic PHP Licensing System Works
If you decide to build a custom solution inspired by GitHub projects, the logic usually follows these four steps: Step 1: Key Generation On your server, you generate a unique string.