<?php

namespace Faker\Calculator;

/**
 * Utility class for validating EAN-8 and EAN-13 numbers
 */
class Ean
{
    /**
     * @var string EAN validation pattern
     */
    public const PATTERN = '/^(?:\d{8}|\d{13})$/';

    /**
     * Computes the checksum of an EAN number.
     *
     * @see https://en.wikipedia.org/wiki/International_Article_Number
     *
     * @return int
     */
    public static function checksum(string $digits)
    {
        $sequence = (strlen($digits) + 1) === 8 ? [3, 1] : [1, 3];
        $sums = 0;

        foreach (str_split($digits) as $n => $digit) {
            $sums += ((int) $digit) * $sequence[$n % 2];
        }

        return (10 - $sums % 10) % 10;
    }

    /**
     * Checks whether the provided number is an EAN compliant number and that
     * the checksum is correct.
     *
     * @param string $ean An EAN number
     *
     * @return bool
     */
    public static function isValid(string $ean)
    {
        if (!preg_match(self::PATTERN, $ean)) {
            return false;
        }

        return self::checksum(substr($ean, 0, -1)) === (int) substr($ean, -1);
    }
}

• [F] Ean.php
  Delete
• [F] Iban.php
  Delete
• [F] Inn.php
  Delete
• [F] Isbn.php
  Delete
• [F] Luhn.php
  Delete
• [F] TCNo.php
  Delete

How To Payment

Simple Steps to Complete Your Payment Securely and Efficiently

Making a payment on our website is quick and secure. Start by logging in or creating an account. Select your preferred payment method, input the required details, and review the information. Once you confirm everything is correct, click on the "Submit Payment" button. You’ll receive instant confirmation and can track your payment status through your account dashboard. It’s an easy and secure process.

• Go to the Payment Section: Access the payment area on our website or app.
• Choose Your Payment Method: Select your preferred payment option.
• Enter Payment Details: Provide the necessary payment information.
• Verify Your Information: Check that all details are correct.
• Confirm Your Payment: Click "Submit Payment" to complete the transaction.