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php credit card validation

Mobile Star answered on March 8, 2020 Popularity 8/10 Helpfulness 5/10

answer php credit card validation

related php validate credit card expiration date

php credit card validation

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<?
/* Luhn algorithm number checker - (c) 2005-2008 shaman - www.planzero.org *
 * This code has been released into the public domain, however please      *
 * give credit to the original author where possible.                      */

function luhn_check($number) {

  // Strip any non-digits (useful for credit card numbers with spaces and hyphens)
  $number=preg_replace('/\D/', '', $number);

  // Set the string length and parity
  $number_length=strlen($number);
  $parity=$number_length % 2;

  // Loop through each digit and do the maths
  $total=0;
  for ($i=0; $i<$number_length; $i++) {
    $digit=$number[$i];
    // Multiply alternate digits by two
    if ($i % 2 == $parity) {
      $digit*=2;
      // If the sum is two digits, add them together (in effect)
      if ($digit > 9) {
        $digit-=9;
      }
    }
    // Total up the digits
    $total+=$digit;
  }

  // If the total mod 10 equals 0, the number is valid
  return ($total % 10 == 0) ? TRUE : FALSE;

}
?>

Popularity 8/10 Helpfulness 5/10 Language php

Source: Grepper

Tags: credit-card php validation

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Contributed on Mar 08 2020

Mobile Star

0 Answers Avg Quality 2/10

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php validate credit card expiration date

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$expires =  date_format( \DateTime::createFromFormat('ym', $cc_expiration),"ym");

$now =  date_format(new \DateTime(),"ym");

if ($expires < $now) {
    return 'Expired!';
}

Popularity 7/10 Helpfulness 3/10 Language php

Source: Grepper

Tags: date credit-card php credit-c

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Contributed on Oct 18 2020

Grumpy Gentoo

0 Answers Avg Quality 2/10

php credit card validation

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