Always clean user inputs using functions like preg_replace('/\D/', '', $input) to strip away formatting spaces or hyphens before running your math logic. This prevents formatting differences from breaking your code. 3. Rate Limiting
Payment gateways provide documented test card numbers that behave predictably in sandbox environments. Stripe, for example, offers test cards for Visa (4012 8888 8888 1881), Mastercard (5555 5555 5555 4444), American Express (3782 8224 6310 005), and many specialized testing scenarios.
Below is a modular, clean object-oriented PHP class that sanitizes input, identifies the card type, and runs the Luhn algorithm. cc checker script php
Advanced scripts use APIs to check if a BIN is still active or to identify the specific bank and country of origin. This is particularly useful for fraud prevention in e-commerce. 3. Real-time Frontend Validation
The script uses cURL to mimic a real browser. The critical part is sending an authorization request to a payment API. Rate Limiting Payment gateways provide documented test card
The Payment Card Industry Data Security Standard (PCI-DSS) prohibits storing raw credit card numbers or CVV codes in your databases unless you have specialized, heavily audited infrastructure.
curl_setopt($ch, CURLOPT_POSTFIELDS, $payload); $response = curl_exec($ch); $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE); curl_close($ch); Advanced scripts use APIs to check if a
Starts with 51 through 55 , or 2221 through 2720 . American Express (Amex): Starts with 34 or 37 .
: Implement strict rate-limiting (e.g., via Redis) to prevent "carding" bots from using your script to test stolen databases. Stripe Elements to handle card data without it ever touching your server?
is a Stripe-focused tool that checks the validity of Stripe Secret Keys and credit card information against multiple Stripe API configurations. It includes authentication, Telegram notifications, and a credit card generator for creating test numbers.
$sum += $digit; "Valid $type" "Invalid Card" Use code with caution. Copied to clipboard Important Security & Ethics Note Offline vs. Online : This script only checks if a number is mathematically valid
