What are the best practices for obtaining permission to display data from external sources on a PHP website?

When displaying data from external sources on a PHP website, it is important to obtain proper permission to avoid any legal issues. The best practice is to always check the terms of use or licensing agreements of the external data source to see if displaying their data is allowed. If permission is required, reach out to the data source to request authorization before displaying their data on your website.

// Example code to obtain permission before displaying data from an external source

// Check terms of use or licensing agreements of external data source
// If permission is required, request authorization before displaying data

$externalDataSource = "https://example.com/data.json";
$permissionGranted = false;

// Check if permission is required
if($permissionRequired) {
    // Request permission from external source
    $permissionGranted = requestPermission($externalDataSource);
}

if($permissionGranted) {
    // Display data from external source on website
    $data = file_get_contents($externalDataSource);
    echo $data;
} else {
    echo "Permission to display data from external source not granted.";
}

function requestPermission($source) {
    // Code to request permission from external source
    // Return true if permission is granted, false otherwise
}