Not all license systems are created equal. A quick search for "php license key system github install" yields hundreds of results. Here are three excellent, popular options to consider:
'error', 'message' => 'Missing parameters.']); exit; // Fetch license details $stmt = $pdo->prepare("SELECT * FROM licenses WHERE license_key = ?"); $stmt->execute([$license_key]); $license = $stmt->fetch(PDO::FETCH_ASSOC); if (!$license) echo json_encode(['status' => 'invalid', 'message' => 'License key does not exist.']); exit; if ($license['status'] !== 'active') echo json_encode(['status' => 'inactive', 'message' => 'This license is ' . $license['status']]); exit; // Check expiration date if ($license['expires_at'] && strtotime($license['expires_at']) < time()) echo json_encode(['status' => 'expired', 'message' => 'License has expired.']); exit; // Check if domain is already activated $stmt = $pdo->prepare("SELECT * FROM activations WHERE license_id = ? AND domain = ?"); $stmt->execute([$license['id'], $domain]); $already_active = $stmt->fetch(); if ($already_active) echo json_encode(['status' => 'valid', 'message' => 'License verified successfully.']); exit; // Check activation limits for new domains if ($license['current_activations'] >= $license['activation_limit']) echo json_encode(['status' => 'limit_reached', 'message' => 'Activation limit reached.']); exit; // Register new activation $pdo->prepare("INSERT INTO activations (license_id, domain) VALUES (?, ?)")->execute([$license['id'], $domain]); $pdo->prepare("UPDATE licenses SET current_activations = current_activations + 1 WHERE id = ?")->execute([$license['id']]); echo json_encode(['status' => 'valid', 'message' => 'License activated successfully.']); Use code with caution. 📦 Step 3: Integrating the Client-Side Verification
Even with offline tokens, it's a good practice to revalidate periodically to catch revocations or expirations. php license key system github install
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']]);
Use GitHub search: php license key system stars:>50 Not all license systems are created equal
with a password or use only via CLI
: PHP 8.1 or higher (for modern cryptography and security features). Database : MySQL 8.0+ or PostgreSQL. Web Server : Apache (with mod_rewrite enabled) or Nginx. Composer : Installed globally for dependency management. $_SESSION['license_valid'] = true
If you’re developing PHP applications or plugins, protecting your intellectual property is a top priority. Implementing a license key system ensures that only authorized users can access your software. Fortunately, several high-quality open-source projects on GitHub can help you get started quickly.
cp .env.example .env