Personal Computer World 2005 October/PCWOCT05.iso/Software/FromTheMag/XAMPP 1.4.14/xampp-win32-1.4.14-installer.exe/xampp/php/pear/Image/Barcode/Code39.php

PHP Script | 2004-03-24 | 8.5 KB | 313 lines

<?php
/* vim: set expandtab tabstop=4 shiftwidth=4: */
// +----------------------------------------------------------------------+
// | PHP version 4                                                        |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2003 The PHP Group                                |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 of the PHP license,       |
// | that is bundled with this package in the file LICENSE, and is        |
// | available through the world-wide-web at                              |
// | http://www.php.net/license/2_02.txt.                                 |
// | If you did not receive a copy of the PHP license and are unable to   |
// | obtain it through the world-wide-web, please send a note to          |
// | [e-mail] so we can mail you a copy immediately.               |
// +----------------------------------------------------------------------+
// | Authors: Ryan Briones <[e-mail]>                   |
// |                                                                      |
// +----------------------------------------------------------------------+
//
// Last Modified: 2003/12/09 - Ryan Briones

/**
 *
 * Image_Barcode_Code39 creates Code 3 of 9 ( Code39 ) barcode images. It's
 * implementation borrows heavily for the perl module GD::Barcode::Code39
 *
 * @author Ryan Briones <[e-mail]>
 * @todo add a function to print images directly to browser not using the draw() function
 *
 */


require_once "PEAR.php";
require_once "Image/Barcode.php";

/*
 *
 * the function str_split() has been including, not part of the class for
 * it's ability to emulate Perl's split( //, $text ). This function was
 * stolen from the PHP function documentation comments on PHP's str_split()
 * which is to be included in PHP5.
 *
 * @param string $str
 * @param int number of characters you wish to split on
 * @return array|false Returns an array or false when $num is less than 1
 */
function str_split( $str, $num = '1' ) {
   if($num < 1) return FALSE;
   $arr = array();
   for ($j = 0; $j < strlen($str); $j= $j+$num) {
       $arr[] = substr($str,$j,$num);
   }
   return $arr;
}

class Image_Barcode_Code39 extends Image_Barcode {
    /**
     * Barcode type
     * @var string
     */
    var $_type = 'Code39';

    /**
     * Barcode height
     *
     * @var integer
     */
    var $_barcodeheight = 50;

    /**
     * Bar thin width
     *
     * @var integer
     */
    var $_barthinwidth = 1;

    /**
     * Bar thick width
     *
     * @var integer
     */
    var $_barthickwidth = 3;

    /**
     * Coding map
     * @var array
     */
    var $_coding_map = array(
        '0' => '000110100',
        '1' => '100100001',
        '2' => '001100001',
        '3' => '101100000',
        '4' => '000110001',
        '5' => '100110000',
        '6' => '001110000',
        '7' => '000100101',
        '8' => '100100100',
        '9' => '001100100',
        'A' => '100001001',
        'B' => '001001001',
        'C' => '101001000',
        'D' => '000011001',
        'E' => '100011000',
        'F' => '001011000',
        'G' => '000001101',
        'H' => '100001100',
        'I' => '001001100',
        'J' => '000011100',
        'K' => '100000011',
        'L' => '001000011',
        'M' => '101000010',
        'N' => '000010011',
        'O' => '100010010',
        'P' => '001010010',
        'Q' => '000000111',
        'R' => '100000110',
        'S' => '001000110',
        'T' => '000010110',
        'U' => '110000001',
        'V' => '011000001',
        'W' => '111000000',
        'X' => '010010001',
        'Y' => '110010000',
        'Z' => '011010000',
        '-' => '010000101',
        '*' => '010010100',
        '+' => '010001010',
        '$' => '010101000',
        '%' => '000101010',
        '/' => '010100010',
        '.' => '110000100',
        ' ' => '011000100'
    );

        /*
         *
         * constructor
         *
         * @param string $text
         * @param int $wThin Width of the thin lines on the barcode
         * @param int $wThick Width of the thick lines on the barcode
         *
         */
    function Image_Barcode_Code39( $text = '', $wThin = 0, $wThick = 0 ) {

        // Check $text for invalid characters
        if ( $this->checkInvalid( $text ) ) {
            return false;
        }

        $this->text = $text;
        if ( $wThin > 0 ) $this->_barthinwidth = $wThin;
        if ( $wThick > 0 ) $this->_barthickwidth = $wThick;

        return true;
    }

        /*
         *
         * make an image resource using the GD image library
         *
         * @param bool $noText Set to true if you'd like your barcode to be sans text
         * @param int $bHeight height of the barcode image including text
         * @return resource The Barcode Image (TM)
         *
         */
    function plot( $noText = false, $bHeight = 0 ) {
       // add start and stop * characters
       $final_text = "*" . $this->text . "*";

             if ( $bHeight > 0 ) {
                 $this->_barcodeheight = $bHeight;
             }

       $barcode = '';
       foreach ( str_split( $final_text ) as $character ) {
           $barcode .= $this->_dumpCode( $this->_coding_map[$character] . '0' );
       }

       $barcode_len = strlen( $barcode );

       // Create GD image object
       $img = imagecreate( $barcode_len, $this->_barcodeheight );

       // Allocate black and white colors to the image
       $black = imagecolorallocate( $img, 0, 0, 0 );
       $white = imagecolorallocate( $img, 255, 255, 255 );
       $font_height = ( $noText ? 0 : imagefontheight( "gdFontSmall" ) );
       $font_width = imagefontwidth( "gdFontSmall" );

       // fill background with white color
       imagefill( $img, 0, 0, $white );

       // Initialize X position
       $xpos = 0;

       // draw barcode bars to image
             if ( $noText ) {
                 foreach ( str_split( $barcode ) as $character_code ) {
                         if ( $character_code == 0 ) {
                                 imageline( $img, $xpos, 0, $xpos, $this->_barcodeheight, $white );
                         } else {
                                 imageline( $img, $xpos, 0, $xpos, $this->_barcodeheight, $black );
                         }

                         $xpos++;
                    }
                } else {
                     foreach ( str_split( $barcode ) as $character_code ) {
                             if ( $character_code == 0 ) {
                                     imageline( $img, $xpos, 0, $xpos, $this->_barcodeheight - $font_height - 1, $white );
                             } else {
                                     imageline( $img, $xpos, 0, $xpos, $this->_barcodeheight - $font_height - 1, $black );
                             }

                             $xpos++;
                        }

                        // draw text under barcode
                        imagestring( $img, "gdFontSmall",
                                ( $barcode_len - $font_width * strlen( $this->text ) )/2,
                                $this->_barcodeheight - $font_height,
                                $this->text,
                                $black );
                }

        return $img;
    }

        /*
         *
         * send image to the browser; for Image_Barcode compaitbility
         *
         * @param string $text
         * @param string $imgtype Image type; accepts jpg, png, and gif, but gif only works if you've payed for licensing
         * @param bool $noText Set to true if you'd like your barcode to be sans text
         * @param int $bHeight height of the barcode image including text
         * @return bool true or die
         *
         */
    function draw( $text, $imgtype = 'png', $noText = false, $bHeight = 0 ) {
                // Check $text for invalid characters
        if ( $this->checkInvalid( $text ) ) {
            return false;
        }

                $this->text = $text;
        $img = $this->plot( $noText, $bHeight );

                // Send image to browser
                switch($imgtype) {
                                case 'gif':
                            header("Content-type: image/gif");
                        imagegif($img);
                        imagedestroy($img);
                        break;

                    case 'jpg':
                        header("Content-type: image/jpg");
                        imagejpeg($img);
                        imagedestroy($img);
                    break;

                    default:
                        header("Content-type: image/png");
                        imagepng($img);
                        imagedestroy($img);
                    break;
                }

                return true;
    }

    /*
     *
     * _dumpCode is a PHP implementation of dumpCode from the Perl module
     * GD::Barcode::Code39. I royally screwed up when trying to do the thing
     * my own way the first time. This way works.
         *
         * @param string $code Code39 barcode code
         * @return string $result barcode line code
     *
     * @access private
     *
     */
    function _dumpCode( $code ) {
        $result = '';
        $color = 1;    // 1: Black, 0: White

        // if $bit is 1, line is wide; if $bit is 0 line is thin
        foreach ( str_split( $code ) as $bit ) {
            $result .= ( ( $bit == 1 ) ? str_repeat( "$color", $this->_barthickwidth ) : str_repeat( "$color", $this->_barthinwidth ) );
            $color = ( ( $color == 0 ) ? 1 : 0 );
        }

        return $result;
    }

    /*
     *
     * check for invalid characters
     *
     * @param string $text
     * @return bool returns true when invalid characters have been found
     *
     */
    function checkInvalid( $text ) {
        return preg_match( "/[^0-9A-Z\-*+\$%\/. ]/", $text );
    }
}

?>