| commit | author | age | ||
| 175a52 | 1 | <?php |
| JK | 2 | class checksum { |
| 3 | static function EAN($kod) { | |
| 4 | $kod = str_split($kod); | |
| 5 | ||
| 6 | $now = 1; | |
| 7 | foreach($kod as $v) { | |
| 8 | if($now==1) { | |
| 9 | $sum += $v; | |
| 10 | $now = 3; | |
| 11 | } | |
| 12 | else | |
| 13 | { | |
| 14 | $sum += $v*3; | |
| 15 | $now = 1; | |
| 16 | } | |
| 17 | } | |
| 18 | ||
| 19 | return (10 - ($sum%10)) % 10; | |
| 20 | } | |
| 21 | ||
| 22 | static function ISBN($kod) { | |
| 23 | $kod = str_split($kod); | |
| 24 | ||
| 25 | foreach($kod as $k => $v) { | |
| 26 | $sum += (10-$k)*$v; | |
| 27 | } | |
| 28 | ||
| 29 | $sum = (11 - ($sum % 11)) % 11; | |
| 30 | if($sum == 10) { | |
| 31 | $sum = 'X'; | |
| 32 | } | |
| 33 | ||
| 34 | return $sum; | |
| 35 | } | |
| 36 | ||
| 37 | static function ISSN($kod) { | |
| 38 | $kod = str_split($kod); | |
| 39 | ||
| 40 | foreach($kod as $k => $v) { | |
| 41 | $sum += (8-$k)*$v; | |
| 42 | } | |
| 43 | ||
| 44 | $sum = (11 - ($sum % 11)) % 11; | |
| 45 | if($sum == 10) { | |
| 46 | $sum = 'X'; | |
| 47 | } | |
| 48 | ||
| 49 | return $sum; | |
| 50 | } | |
| 51 | } | |
| 52 | ?> | |
