How can developers ensure that their PHP modules are only used by licensed users and not shared across multiple websites?

Developers can ensure that their PHP modules are only used by licensed users by implementing a licensing system that checks for a valid license key before allowing access to the module. This can be done by generating unique license keys for each user and validating them against a central server. Additionally, developers can include code obfuscation techniques to make it harder for users to share the module across multiple websites. 

// Example PHP code snippet for implementing a licensing system

$license_key = $_GET['license_key']; // Get the license key from the user

$valid_license_keys = array("abc123", "xyz456"); // Array of valid license keys

if (in_array($license_key, $valid_license_keys)) {
    // Module code here
    echo "Module code executed successfully.";
} else {
    echo "Invalid license key. Please purchase a valid license.";
}

Keywords

PHP modules licensing user authentication session management security restrictions

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