1 |
jonen |
1.1 |
<? |
2 |
|
|
/* |
3 |
|
|
|
4 |
|
|
* Built-In Encoders |
5 |
|
|
* Part of PHP-Barcode 0.3pl1 |
6 |
|
|
|
7 |
|
|
* (C) 2001,2002,2003,2004 by Folke Ashberg <folke@ashberg.de> |
8 |
|
|
|
9 |
|
|
* The newest version can be found at http://www.ashberg.de/bar |
10 |
|
|
|
11 |
|
|
* This program is free software; you can redistribute it and/or modify |
12 |
|
|
* it under the terms of the GNU General Public License as published by |
13 |
|
|
* the Free Software Foundation; either version 2 of the License, or |
14 |
|
|
* (at your option) any later version. |
15 |
|
|
|
16 |
|
|
* This program is distributed in the hope that it will be useful, |
17 |
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
18 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
19 |
|
|
* GNU General Public License for more details. |
20 |
|
|
|
21 |
|
|
* You should have received a copy of the GNU General Public License |
22 |
|
|
* along with this program; if not, write to the Free Software |
23 |
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
24 |
|
|
|
25 |
|
|
*/ |
26 |
|
|
|
27 |
|
|
function barcode_gen_ean_sum($ean){ |
28 |
|
|
$even=true; $esum=0; $osum=0; |
29 |
|
|
for ($i=strlen($ean)-1;$i>=0;$i--){ |
30 |
|
|
if ($even) $esum+=$ean[$i]; else $osum+=$ean[$i]; |
31 |
|
|
$even=!$even; |
32 |
|
|
} |
33 |
|
|
return (10-((3*$esum+$osum)%10))%10; |
34 |
|
|
} |
35 |
|
|
|
36 |
|
|
/* barcode_encode_ean(code [, encoding]) |
37 |
|
|
* encodes $ean with EAN-13 using builtin functions |
38 |
|
|
* |
39 |
|
|
* return: |
40 |
|
|
* array[encoding] : the encoding which has been used (EAN-13) |
41 |
|
|
* array[bars] : the bars |
42 |
|
|
* array[text] : text-positioning info |
43 |
|
|
*/ |
44 |
|
|
function barcode_encode_ean($ean, $encoding = "EAN-13"){ |
45 |
|
|
$digits=array(3211,2221,2122,1411,1132,1231,1114,1312,1213,3112); |
46 |
|
|
$mirror=array("000000","001011","001101","001110","010011","011001","011100","010101","010110","011010"); |
47 |
|
|
$guards=array("9a1a","1a1a1","a1a"); |
48 |
|
|
|
49 |
|
|
$ean=trim($ean); |
50 |
|
|
if (eregi("[^0-9]",$ean)){ |
51 |
|
|
return array("text"=>"Invalid EAN-Code"); |
52 |
|
|
} |
53 |
|
|
$encoding=strtoupper($encoding); |
54 |
|
|
if ($encoding=="ISBN"){ |
55 |
|
|
if (!ereg("^978", $ean)) $ean="978".$ean; |
56 |
|
|
} |
57 |
|
|
if (ereg("^978", $ean)) $encoding="ISBN"; |
58 |
|
|
if (strlen($ean)<12 || strlen($ean)>13){ |
59 |
|
|
return array("text"=>"Invalid $encoding Code (must have 12/13 numbers)"); |
60 |
|
|
} |
61 |
|
|
|
62 |
|
|
$ean=substr($ean,0,12); |
63 |
|
|
$eansum=barcode_gen_ean_sum($ean); |
64 |
|
|
$ean.=$eansum; |
65 |
|
|
$line=$guards[0]; |
66 |
|
|
for ($i=1;$i<13;$i++){ |
67 |
|
|
$str=$digits[$ean[$i]]; |
68 |
|
|
if ($i<7 && $mirror[$ean[0]][$i-1]==1) $line.=strrev($str); else $line.=$str; |
69 |
|
|
if ($i==6) $line.=$guards[1]; |
70 |
|
|
} |
71 |
|
|
$line.=$guards[2]; |
72 |
|
|
|
73 |
|
|
/* create text */ |
74 |
|
|
$pos=0; |
75 |
|
|
$text=""; |
76 |
|
|
for ($a=0;$a<13;$a++){ |
77 |
|
|
if ($a>0) $text.=" "; |
78 |
|
|
$text.="$pos:12:{$ean[$a]}"; |
79 |
|
|
if ($a==0) $pos+=12; |
80 |
|
|
else if ($a==6) $pos+=12; |
81 |
|
|
else $pos+=7; |
82 |
|
|
} |
83 |
|
|
|
84 |
|
|
return array( |
85 |
|
|
"encoding" => $encoding, |
86 |
|
|
"bars" => $line, |
87 |
|
|
"text" => $text |
88 |
|
|
); |
89 |
|
|
} |
90 |
|
|
|
91 |
|
|
?> |