“Now the Bereans were more noble-minded than the Thessalonians, for they received the message with great eagerness and examined the Scriptures every day to see if these teachings were true.” – Acts 17:11
'Method Not Allowed']); exit(); // Get posted data $data = json_decode(file_get_contents("php://input")); if (!empty($data->card_number)) $validationResult = CardValidator::validate($data->card_number); if ($validationResult['valid']) http_response_code(200); else http_response_code(422); // Unprocessable Entity echo json_encode($validationResult); else http_response_code(400); echo json_encode(['error' => 'Missing "card_number" parameter.']); Use code with caution. 4. Crucial Security and PCI-DSS Compliance Rules