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How to license and sell PHP software

Validate downloadable PHP software against the correct product, apply feature flags to editions, and let your Store turn a verified provider payment into a delivered license.

Build your Store Try live validation
0% PermitCore commission Your payment account Automatic license delivery
PHP 8+
Composer
composer require permitcore/sdk:2.1.1
<?php
require 'vendor/autoload.php';

use PermitCore\PermitCoreClient;

$client = new PermitCoreClient(
    'https://api.permitcore.dev'
);
$result = $client->validate(
    $licenseKey,
    expectedProductId: $productId
);

if (!$result->isValid) exit($result->message);
One connected workflow

From product record to paid customer

Use PermitCore for the licensing layer and Store checkout. Verified paid evidence triggers the configured license issuance and queues the delivery email; test actual delivery before launch.

  1. 01
    Create

    Create the product and license policy

    In Products, create the software your key unlocks. Choose its activation limit, validity, offline grace period, version range, and feature flags.

    • Create the plugin or downloadable product
    • Choose activations and validity
    • Define paid feature flags
    • Copy the product ID
  2. 02
    Implement

    Install the PHP SDK and scope the key

    Put license activation in the first-run flow and validation at startup. Pass your product ID so a valid key for another product cannot unlock this one.

    These are application fragments: supply your own key/product variables and UI or host flow. A validation call does not register a device or reserve a floating session. Check failure before protected work. Offline use needs explicitly configured trusted public keys; follow the SDK 2.1.1 offline setup. For C++, use the vcpkg registry and pinned baseline in its installation reference, rather than assuming a built-in public port.

    composer require permitcore/sdk:2.1.1
    • Install the official Composer package
    • Activate per installation when needed
    • Validate before protected operations
    • Scope the key to this product
    Read the complete PHP SDK reference
  3. 03
    Verify

    Test the real validation path

    Create a test key for the PHP product and call the same code from a clean installation. Then try a key from another product and confirm expectedProductId returns WrongProduct instead of granting access.

    Run the public demoSee a real PermitCore API response Open the SandboxExplore the product before signup
  4. 04
    Sell

    Publish the product in your Store

    Connect your chosen Stripe, Paddle or Lemon Squeezy account, add the product to your branded PermitCore Store, and publish. Account credentials, matching catalog prices and signed webhook configuration are required. PermitCore processes the verified payment and handles Store license fulfillment.

    • Create a Store listing and pricing
    • Connect the selected Store payment provider
    • Publish the checkout
    • Let payment create and deliver the key
    Follow the Store setup guide
    PermitCore branded Store showing software products ready to buy
    Verified payment triggers license issuance and the delivery email queue.
Before you ship

PHP production checklist

The sample is intentionally small. Add these safeguards before making licensing part of a paid release.

  • Perform checks server-side and keep the stored customer key out of public logs.
  • Cache only according to your revocation and offline-grace requirements.
  • Use feature flags for editions instead of distributing multiple validation secrets.
  • Test shared-hosting environments with cURL, JSON, and OpenSSL extensions enabled.
The complete commercial path

Stop at a working sale, not a working API call.

Create the license policy, ship the PHP integration, and give buyers a Store where they can purchase it.

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