What are the differences between using the REST-API Sandbox key and the "Zugang produktive Daten" key in the ImmoScout24 API in PHP?

When working with the ImmoScout24 API in PHP, the main difference between using the REST-API Sandbox key and the "Zugang produktive Daten" key is that the Sandbox key is used for testing and development purposes, while the "Zugang produktive Daten" key is used for accessing live production data. To switch between the two keys, you need to update the API key in your PHP code.

// Using the REST-API Sandbox key
$api_key = "YOUR_SANDBOX_API_KEY";

// Using the "Zugang produktive Daten" key
$api_key = "YOUR_PRODUCTION_API_KEY";