function invokeGetRequest($requestUrl)
{
    global $apiKey, $base_url, $source, $destination, $doj;

    // Construct URL with query parameters
    $queryParams = http_build_query([
        'source'      => $source,
        'destination' => $destination,
        'doj'         => $doj
    ]);
    $url = $base_url . $requestUrl . '?' . $queryParams;

    // Set up headers (API Key sent in a custom header)
    $headers = [
        "Content-Type: application/json",
        "authorization: ApiKey $apiKey"  
    ];

    try {
        // Initialize cURL
        $ch = curl_init();
        if (!$ch) {
            throw new Exception("cURL initialization failed");
        }
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ch, CURLOPT_TIMEOUT, 120);

        $response = curl_exec($ch);
        if ($response === false) {
            throw new Exception("cURL Error: " . curl_error($ch));
        }
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);

        // Return the response in the desired format
        return [
            "status"   => $httpCode,
            "response" => json_decode($response, true)
        ];
    } catch (Exception $e) {
        // Handle the exception as needed (e.g., logging, rethrowing, etc.)
        echo "Request failed: " . $e->getMessage();
    }
}