Barcode.php
| 1 | <?php |
| 2 | |
| 3 | namespace Faker\Provider; |
| 4 | |
| 5 | /** |
| 6 | * @see http://en.wikipedia.org/wiki/EAN-13 |
| 7 | * @see http://en.wikipedia.org/wiki/ISBN |
| 8 | */ |
| 9 | class Barcode extends Base |
| 10 | { |
| 11 | private function ean($length = 13) |
| 12 | { |
| 13 | $code = static::numerify(str_repeat('#', $length - 1)); |
| 14 | |
| 15 | return $code . static::eanChecksum($code); |
| 16 | } |
| 17 | |
| 18 | /** |
| 19 | * Utility function for computing EAN checksums |
| 20 | * |
| 21 | * @param string $input |
| 22 | * |
| 23 | * @return integer |
| 24 | */ |
| 25 | protected static function eanChecksum($input) |
| 26 | { |
| 27 | $sequence = (strlen($input) + 1) === 8 ? array(3, 1) : array(1, 3); |
| 28 | $sums = 0; |
| 29 | foreach (str_split($input) as $n => $digit) { |
| 30 | $sums += $digit * $sequence[$n % 2]; |
| 31 | } |
| 32 | return (10 - $sums % 10) % 10; |
| 33 | } |
| 34 | |
| 35 | /** |
| 36 | * ISBN-10 check digit |
| 37 | * @link http://en.wikipedia.org/wiki/International_Standard_Book_Number#ISBN-10_check_digits |
| 38 | * |
| 39 | * @param string $input ISBN without check-digit |
| 40 | * @throws \LengthException When wrong input length passed |
| 41 | * |
| 42 | * @return integer Check digit |
| 43 | */ |
| 44 | protected static function isbnChecksum($input) |
| 45 | { |
| 46 | // We're calculating check digit for ISBN-10 |
| 47 | // so, the length of the input should be 9 |
| 48 | $length = 9; |
| 49 | |
| 50 | if (strlen($input) !== $length) { |
| 51 | throw new \LengthException(sprintf('Input length should be equal to %d', $length)); |
| 52 | } |
| 53 | |
| 54 | $digits = str_split($input); |
| 55 | array_walk( |
| 56 | $digits, |
| 57 | function (&$digit, $position) { |
| 58 | $digit = (10 - $position) * $digit; |
| 59 | } |
| 60 | ); |
| 61 | $result = (11 - array_sum($digits) % 11) % 11; |
| 62 | |
| 63 | // 10 is replaced by X |
| 64 | return ($result < 10)?$result:'X'; |
| 65 | } |
| 66 | |
| 67 | /** |
| 68 | * Get a random EAN13 barcode. |
| 69 | * @return string |
| 70 | * @example '4006381333931' |
| 71 | */ |
| 72 | public function ean13() |
| 73 | { |
| 74 | return $this->ean(13); |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Get a random EAN8 barcode. |
| 79 | * @return string |
| 80 | * @example '73513537' |
| 81 | */ |
| 82 | public function ean8() |
| 83 | { |
| 84 | return $this->ean(8); |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Get a random ISBN-10 code |
| 89 | * @link http://en.wikipedia.org/wiki/International_Standard_Book_Number |
| 90 | * |
| 91 | * @return string |
| 92 | * @example '4881416324' |
| 93 | */ |
| 94 | public function isbn10() |
| 95 | { |
| 96 | $code = static::numerify(str_repeat('#', 9)); |
| 97 | |
| 98 | return $code . static::isbnChecksum($code); |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * Get a random ISBN-13 code |
| 103 | * @link http://en.wikipedia.org/wiki/International_Standard_Book_Number |
| 104 | * |
| 105 | * @return string |
| 106 | * @example '9790404436093' |
| 107 | */ |
| 108 | public function isbn13() |
| 109 | { |
| 110 | $code = '97' . static::numberBetween(8, 9) . static::numerify(str_repeat('#', 9)); |
| 111 | |
| 112 | return $code . static::eanChecksum($code); |
| 113 | } |
| 114 | } |
| 115 |