forked from Wavyzz/dolibarr
91 lines
2.6 KiB
PHP
91 lines
2.6 KiB
PHP
<?php
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/*
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*
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* Built-In Encoders
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* Part of PHP-Barcode 0.3pl1
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*
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* (C) 2001,2002,2003,2004 by Folke Ashberg <folke@ashberg.de>
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*
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* The newest version can be found at http://www.ashberg.de/bar
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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function barcode_gen_ean_sum($ean){
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$even=true; $esum=0; $osum=0;
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for ($i=strlen($ean)-1;$i>=0;$i--){
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if ($even) $esum+=$ean[$i]; else $osum+=$ean[$i];
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$even=!$even;
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}
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return (10-((3*$esum+$osum)%10))%10;
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}
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/* barcode_encode_ean(code [, encoding])
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* encodes $ean with EAN-13 using builtin functions
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*
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* return:
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* array[encoding] : the encoding which has been used (EAN-13)
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* array[bars] : the bars
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* array[text] : text-positioning info
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*/
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function barcode_encode_ean($ean, $encoding = "EAN-13"){
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$digits=array(3211,2221,2122,1411,1132,1231,1114,1312,1213,3112);
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$mirror=array("000000","001011","001101","001110","010011","011001","011100","010101","010110","011010");
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$guards=array("9a1a","1a1a1","a1a");
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$ean=trim($ean);
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if (preg_match("/[^0-9]/i",$ean)){
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return array("text"=>"Invalid EAN-Code");
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}
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$encoding=strtoupper($encoding);
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if ($encoding=="ISBN"){
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if (!preg_match("/^978/", $ean)) $ean="978".$ean;
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}
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if (preg_match("/^978/", $ean)) $encoding="ISBN";
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if (strlen($ean)<12 || strlen($ean)>13){
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return array("text"=>"Invalid $encoding Code (must have 12/13 numbers)");
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}
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$ean=substr($ean,0,12);
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$eansum=barcode_gen_ean_sum($ean);
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$ean.=$eansum;
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$line=$guards[0];
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for ($i=1;$i<13;$i++){
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$str=$digits[$ean[$i]];
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if ($i<7 && $mirror[$ean[0]][$i-1]==1) $line.=strrev($str); else $line.=$str;
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if ($i==6) $line.=$guards[1];
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}
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$line.=$guards[2];
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/* create text */
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$pos=0;
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$text="";
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for ($a=0;$a<13;$a++){
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if ($a>0) $text.=" ";
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$text.="$pos:12:{$ean[$a]}";
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if ($a==0) $pos+=12;
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else if ($a==6) $pos+=12;
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else $pos+=7;
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}
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return array(
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"encoding" => $encoding,
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"bars" => $line,
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"text" => $text
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);
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}
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?>
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