<?php
require('fpdf.php');

class PDF_Code39 extends FPDF
{
function Code39($xpos, $ypos, $code, $baseline=0.5, $height=5){

	$wide = $baseline;
	$narrow = $baseline / 3 ; 
	$gap = $narrow;

	$barChar['0'] = 'nnnwwnwnn';
	$barChar['1'] = 'wnnwnnnnw';
	$barChar['2'] = 'nnwwnnnnw';
	$barChar['3'] = 'wnwwnnnnn';
	$barChar['4'] = 'nnnwwnnnw';
	$barChar['5'] = 'wnnwwnnnn';
	$barChar['6'] = 'nnwwwnnnn';
	$barChar['7'] = 'nnnwnnwnw';
	$barChar['8'] = 'wnnwnnwnn';
	$barChar['9'] = 'nnwwnnwnn';
	$barChar['A'] = 'wnnnnwnnw';
	$barChar['B'] = 'nnwnnwnnw';
	$barChar['C'] = 'wnwnnwnnn';
	$barChar['D'] = 'nnnnwwnnw';
	$barChar['E'] = 'wnnnwwnnn';
	$barChar['F'] = 'nnwnwwnnn';
	$barChar['G'] = 'nnnnnwwnw';
	$barChar['H'] = 'wnnnnwwnn';
	$barChar['I'] = 'nnwnnwwnn';
	$barChar['J'] = 'nnnnwwwnn';
	$barChar['K'] = 'wnnnnnnww';
	$barChar['L'] = 'nnwnnnnww';
	$barChar['M'] = 'wnwnnnnwn';
	$barChar['N'] = 'nnnnwnnww';
	$barChar['O'] = 'wnnnwnnwn'; 
	$barChar['P'] = 'nnwnwnnwn';
	$barChar['Q'] = 'nnnnnnwww';
	$barChar['R'] = 'wnnnnnwwn';
	$barChar['S'] = 'nnwnnnwwn';
	$barChar['T'] = 'nnnnwnwwn';
	$barChar['U'] = 'wwnnnnnnw';
	$barChar['V'] = 'nwwnnnnnw';
	$barChar['W'] = 'wwwnnnnnn';
	$barChar['X'] = 'nwnnwnnnw';
	$barChar['Y'] = 'wwnnwnnnn';
	$barChar['Z'] = 'nwwnwnnnn';
	$barChar['-'] = 'nwnnnnwnw';
	$barChar['.'] = 'wwnnnnwnn';
	$barChar[' '] = 'nwwnnnwnn';
	$barChar['*'] = 'nwnnwnwnn';
	$barChar['$'] = 'nwnwnwnnn';
	$barChar['/'] = 'nwnwnnnwn';
	$barChar['+'] = 'nwnnnwnwn';
	$barChar['%'] = 'nnnwnwnwn';

	$this->SetFont('Arial','',10);
	$this->Text($xpos, $ypos + $height + 4, $code);
	$this->SetFillColor(0);

	$code = '*'.strtoupper($code).'*';
	for($i=0; $i<strlen($code); $i++){
		$char = $code[$i];
		if(!isset($barChar[$char])){
			$this->Error('Invalid character in barcode: '.$char);
		}
		$seq = $barChar[$char];
		for($bar=0; $bar<9; $bar++){
			if($seq[$bar] == 'n'){
				$lineWidth = $narrow;
			}else{
				$lineWidth = $wide;
			}
			if($bar % 2 == 0){
				$this->Rect($xpos, $ypos, $lineWidth, $height, 'F');
			}
			$xpos += $lineWidth;
		}
		$xpos += $gap;
	}
}
}

?>