function commerce_coupon_generate_coupon_code in Commerce Coupon 7

Same name and namespace in other branches

1. 7.2 commerce_coupon.module \commerce_coupon_generate_coupon_code()

Generates a new unique coupon code.

Parameters

$length: Optional The length of the new code.

Return value

String The new coupon code.

1 call to commerce_coupon_generate_coupon_code()

CommerceCouponEntityController::save in classes/commerce_coupon.inc

Saves a coupon.

File

./commerce_coupon.module, line 171

Coupon System for Drupal Commerce.

Code

function commerce_coupon_generate_coupon_code($length = NULL) {

  // We define the possible characters. No 'l','1', 'i' to prevent
  // reconisation problems.
  $characters = array(
    'A',
    'B',
    'C',
    'D',
    'E',
    'F',
    'G',
    'H',
    'J',
    'K',
    'L',
    'M',
    'N',
    'P',
    'Q',
    'R',
    'S',
    'T',
    'U',
    'V',
    'W',
    'X',
    'Y',
    'Z',
    'a',
    'b',
    'c',
    'd',
    'e',
    'f',
    'g',
    'h',
    'j',
    'k',
    'm',
    'n',
    'o',
    'p',
    'q',
    'r',
    's',
    't',
    'u',
    'v',
    'w',
    'x',
    'y',
    'z',
    '2',
    '3',
    '4',
    '5',
    '6',
    '7',
    '8',
    '9',
  );
  $numberOfCharacters = count($characters);
  $codeFound = FALSE;
  if ($length == NULL) {
    $length = variable_get('commerce_coupon_default_code_size', 8);
  }

  // We need to check if the produced coupon code is already in the
  // database. We try this for 1000 iteration. If we then not found a
  // a code, we stop. There must be an error in this case.
  for ($i = 0; $i < 1000 && $codeFound == FALSE; $i++) {
    $code = '';

    // Create the code per character
    for ($c = 0; $c < $length; $c++) {
      $randIndex = mt_rand(0, $numberOfCharacters - 1);
      $code .= $characters[$randIndex];
    }

    // Check in the database if the generated code is already defined.
    if (commerce_coupon_code_exists($code) == FALSE) {
      $codeFound = TRUE;
    }
  }
  return $code;
}