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<?php
/**
* BCGcode11.barcode.php
*--------------------------------------------------------------------
*
* Sub-Class - Code 11
*
*--------------------------------------------------------------------
* Revision History
* v2.0.0 23 apr 2008 Jean-Sébastien Goupil New Version Update
* v1.2.3b 30 dec 2005 Jean-Sébastien Goupil Checksum separated + PHP5.1 compatible + Error in checksum
* v1.2.2 23 jul 2005 Jean-Sébastien Goupil WS Fix
* v1.2.1 27 jun 2005 Jean-Sébastien Goupil Font support added
* V1.00 17 jun 2004 Jean-Sebastien Goupil
*--------------------------------------------------------------------
* $Id: BCGcode11.barcode.php,v 1.11 2009/11/09 04:08:41 jsgoupil Exp $
*--------------------------------------------------------------------
* Copyright (C) Jean-Sebastien Goupil
* http://www.barcodephp.com
*/
include_once('BCGBarcode1D.php');
class BCGcode11 extends BCGBarcode1D {
/**
* Constructor
*/
public function __construct() {
parent::__construct();
$this->keys = array('0','1','2','3','4','5','6','7','8','9','-');
$this->code = array( // 0 added to add an extra space
'000010', /* 0 */
'100010', /* 1 */
'010010', /* 2 */
'110000', /* 3 */
'001010', /* 4 */
'101000', /* 5 */
'011000', /* 6 */
'000110', /* 7 */
'100100', /* 8 */
'100000', /* 9 */
'001000' /* - */
);
}
/**
* Draws the barcode
*
* @param resource $im
*/
public function draw(&$im) {
$error_stop = false;
// Checking if all chars are allowed
$c = strlen($this->text);
for($i = 0; $i < $c; $i++) {
if(array_search($this->text[$i], $this->keys) === false) {
$this->drawError($im,'Char \'' . $this->text[$i] . '\' not allowed.');
$error_stop = true;
}
}
if($error_stop === false) {
// Starting Code
$this->drawChar($im, '001100', true);
// Chars
for($i = 0; $i < $c; $i++) {
$this->drawChar($im, $this->findCode($this->text[$i]), true);
}
// Checksum
$this->calculateChecksum();
$c = count($this->checksumValue);
for($i = 0; $i < $c; $i++) {
$this->drawChar($im, $this->code[$this->checksumValue[$i]], true);
}
// Ending Code
$this->drawChar($im, '00110', true);
$this->drawText($im);
}
}
/**
* Returns the maximal size of a barcode
*
* @return int[]
*/
public function getMaxSize() {
$p = parent::getMaxSize();
$w = 0;
$c = strlen($this->text);
for($i = 0; $i < $c; $i++) {
$index = $this->findIndex($this->text[$i]);
if($index !== false) {
$w += 6;
$w += substr_count($this->code[$index], '1');
}
}
$startlength = 8 * $this->scale;
$textlength = $w * $this->scale;
// We take the max length possible for checksums (it is 7 or 8...)
$checksumlength = 8 * $this->scale;
if($c >= 10) {
$checksumlength += 8 * $this->scale;
}
$endlength = 7 * $this->scale;
return array($p[0] + $startlength + $textlength + $checksumlength + $endlength, $p[1]);
}
/**
* Overloaded method to calculate checksum
*/
protected function calculateChecksum() {
// Checksum
// First CheckSUM "C"
// The "C" checksum character is the modulo 11 remainder of the sum of the weighted
// value of the data characters. The weighting value starts at "1" for the right-most
// data character, 2 for the second to last, 3 for the third-to-last, and so on up to 20.
// After 10, the sequence wraps around back to 1.
// Second CheckSUM "K"
// Same as CheckSUM "C" but we count the CheckSum "C" at the end
// After 9, the sequence wraps around back to 1.
$sequence_multiplier = array(10, 9);
$temp_text = $this->text;
$this->checksumValue = array();
for($z = 0; $z < 2; $z++) {
$c = strlen($temp_text);
// We don't display the K CheckSum if the original text had a length less than 10
if($c <= 10 && $z === 1) {
break;
}
$checksum = 0;
for($i = $c, $j = 0; $i > 0; $i--, $j++) {
$multiplier = $i % $sequence_multiplier[$z];
if($multiplier === 0) {
$multiplier = $sequence_multiplier[$z];
}
$checksum += $this->findIndex($temp_text[$j]) * $multiplier;
}
$this->checksumValue[$z] = $checksum % 11;
$temp_text .= $this->keys[$this->checksumValue[$z]];
}
}
/**
* Overloaded method to display the checksum
*/
protected function processChecksum() {
if($this->checksumValue === false) { // Calculate the checksum only once
$this->calculateChecksum();
}
if($this->checksumValue !== false) {
$ret = '';
$c = count($this->checksumValue);
for($i = 0; $i < $c; $i++) {
$ret .= $this->keys[$this->checksumValue[$i]];
}
return $ret;
}
return false;
}
};
?>
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