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<?php
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if(!defined('IN_CB'))die('You are not allowed to access to this page.');
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/**
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* ean13.php
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*--------------------------------------------------------------------
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*
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* Sub-Class - EAN-13
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*
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* You can provide a ISBN code (without dash), the code will transform
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* it into a EAN13 format.
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* EAN-13 contains
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* - 2 system digits (1 not displayed but coded with parity)
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* - 5 manufacturer code digits
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* - 5 product digits
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* - 1 checksum digit
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*
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*--------------------------------------------------------------------
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* Revision History
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* V1.00 17 jun 2004 Jean-Sebastien Goupil
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*--------------------------------------------------------------------
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* Copyright (C) Jean-Sebastien Goupil
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* http://other.lookstrike.com/barcode/
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*/
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class ean13 extends BarCode {
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protected $keys = array(), $code = array(), $codeParity = array();
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private $text;
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private $textfont;
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private $book;
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/**
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* Constructor
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*
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* @param int $maxHeight
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* @param FColor $color1
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* @param FColor $color2
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* @param int $res
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* @param string $text
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* @param int $textfont
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* @param bool $book
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*/
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public function __construct($maxHeight,FColor $color1,FColor $color2,$res,$text,$textfont,$book=false) {
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BarCode::__construct($maxHeight,$color1,$color2,$res);
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$this->keys = array('0','1','2','3','4','5','6','7','8','9');
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// Left-Hand Odd Parity starting with a space
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// Left-Hand Even Parity is the inverse (0=0012) starting with a space
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// Right-Hand is the same of Left-Hand starting with a bar
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$this->code = array(
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'2100', /* 0 */
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'1110', /* 1 */
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'1011', /* 2 */
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'0300', /* 3 */
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'0021', /* 4 */
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'0120', /* 5 */
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'0003', /* 6 */
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'0201', /* 7 */
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'0102', /* 8 */
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'2001' /* 9 */
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);
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// Parity, 0=Odd, 1=Even for manufacturer code. Depending on 1st System Digit
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$this->codeParity = array(
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array(0,0,0,0,0), /* 0 */
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array(0,1,0,1,1), /* 1 */
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array(0,1,1,0,1), /* 2 */
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array(0,1,1,1,0), /* 3 */
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array(1,0,0,1,1), /* 4 */
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array(1,1,0,0,1), /* 5 */
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array(1,1,1,0,0), /* 6 */
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array(1,0,1,0,1), /* 7 */
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array(1,0,1,1,0), /* 8 */
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array(1,1,0,1,0) /* 9 */
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);
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$this->setText($text);
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$this->textfont = $textfont;
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$this->book = $book;
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}
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/**
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* Saves Text
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*
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* @param string $text
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*/
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public function setText($text){
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$this->text = $text;
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}
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private function inverse($text,$inverse=1) {
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if($inverse == 1)
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$text = strrev($text);
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return $text;
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}
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/**
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* Draws the barcode
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*
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* @param ressource $im
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*/
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public function draw($im) {
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$error_stop = false;
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// Checking if all chars are allowed
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for($i=0;$i<strlen($this->text);$i++) {
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if(!is_int(array_search($this->text[$i],$this->keys))) {
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$this->DrawError($im,'Char \''.$this->text[$i].'\' not allowed.');
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$error_stop = true;
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}
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}
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if($error_stop == false) {
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if($this->book == true && strlen($this->text) != 10) {
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$this->DrawError($im,'Must contains 10 chars if ISBN is true.');
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$error_stop = true;
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}
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// If it's a book, we change the code to the right one
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if($this->book==true && strlen($this->text)==10)
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$this->text = '978'.substr($this->text,0,strlen($this->text)-1);
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// Must contains 12 chars
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if(strlen($this->text) != 12) {
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$this->DrawError($im,'Must contains 12 chars, the 13th digit is automatically added.');
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$error_stop = true;
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}
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if($error_stop == false) {
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// Calculating Checksum
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// Consider the right-most digit of the message to be in an "odd" position,
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// and assign odd/even to each character moving from right to left
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// Odd Position = 3, Even Position = 1
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// Multiply it by the number
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// Add all of that and do 10-(?mod10)
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$odd = true;
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$checksum=0;
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for($i=strlen($this->text);$i>0;$i--) {
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if($odd==true) {
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$multiplier=3;
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$odd=false;
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}
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else {
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$multiplier=1;
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$odd=true;
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}
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$checksum += $this->keys[$this->text[$i - 1]] * $multiplier;
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}
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$checksum = 10 - $checksum % 10;
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$checksum = ($checksum == 10)?0:$checksum;
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$this->text .= $this->keys[$checksum];
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// If we have to write text, we move the barcode to the right to have space to put system digit
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$this->positionX = ($this->textfont == 0)?0:10;
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// Starting Code
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$this->DrawChar($im,'000',1);
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// Draw Second Code
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$this->DrawChar($im,$this->findCode($this->text[1]),2);
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// Draw Manufacturer Code
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for($i=0;$i<5;$i++)
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$this->DrawChar($im,$this->inverse($this->findCode($this->text[$i + 2]),$this->codeParity[$this->text[0]][$i]),2);
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// Draw Center Guard Bar
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$this->DrawChar($im,'00000',2);
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// Draw Product Code
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for($i=7;$i<13;$i++){
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$this->DrawChar($im,$this->findCode($this->text[$i]),1);
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}
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// Draw Right Guard Bar
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$this->DrawChar($im,'000',1);
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$this->lastX = $this->positionX;
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$this->lastY = $this->maxHeight;
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$this->DrawText($im);
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}
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}
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}
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/**
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* Overloaded method for drawing special label
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*
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* @param ressource $im
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*/
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protected function DrawText($im) {
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if($this->textfont != 0) {
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$bar_color = (is_null($this->color1))?NULL:$this->color1->allocate($im);
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if(!is_null($bar_color)) {
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$rememberX = $this->positionX;
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$rememberH = $this->maxHeight;
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// We increase the bars
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$this->maxHeight = $this->maxHeight + 9;
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$this->positionX = 10;
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$this->DrawSingleBar($im,$this->color1);
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$this->positionX += $this->res*2;
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$this->DrawSingleBar($im,$this->color1);
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// Center Guard Bar
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$this->positionX += $this->res*44;
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$this->DrawSingleBar($im,$this->color1);
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$this->positionX += $this->res*2;
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$this->DrawSingleBar($im,$this->color1);
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// Last Bars
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$this->positionX += $this->res*44;
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$this->DrawSingleBar($im,$this->color1);
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$this->positionX += $this->res*2;
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$this->DrawSingleBar($im,$this->color1);
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$this->positionX = $rememberX;
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$this->maxHeight = $rememberH;
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imagechar($im,$this->textfont,1,$this->maxHeight-(imagefontheight($this->textfont)/2),$this->text[0],$bar_color);
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imagestring($im,$this->textfont,10+(3*$this->res+48*$this->res)/2-imagefontwidth($this->textfont)*(6/2),$this->maxHeight+1,substr($this->text,1,6),$bar_color);
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imagestring($im,$this->textfont,10+46*$this->res+(3*$this->res+46*$this->res)/2-imagefontwidth($this->textfont)*(6/2),$this->maxHeight+1,substr($this->text,7,6),$bar_color);
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}
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$this->lastY = $this->maxHeight + imagefontheight($this->textfont);
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}
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}
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};
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?>
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