php实现生成code128条形码的方法详解

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  private $valid_code = -1;
  private $type ='B';
  private $start_codes =array('A'=>self::STARTA,'B'=>self::STARTB,'C'=>self::STARTC);
  private $code ='';
  private $bin_code ='';
  private $text ='';
  public function __construct($code='',$text='',$type='B')
  {
    if (in_array($type,array('A','B','C')))
      $this->setType($type);
    else
      $this->setType('B');
    if ($code !=='')
      $this->setCode($code);
    if ($text !=='')
      $this->setText($text);
  }
  public function setUnitWidth($unit_width)
  {
    $this->unit_width = $unit_width;
    $this->quiet_zone = $this->unit_width*6;
    $this->font_height = $this->unit_width*15;
    if (!$this->is_set_height)
    {
      $this->heith = $this->unit_width*35;
    }
  }
  public function setFontType($font_type)
  {
    $this->font_type = $font_type;
  }
  public function setBgcolor($bgcoloe)
  {
    $this->bgcolor = $bgcoloe;
  }
  public function setColor($color)
  {
    $this->color = $color;
  }
  public function setCode($code)
  {
    if ($code !='')
    {
      $this->code= $code;
      if ($this->text ==='')
        $this->text = $code;
    }
  }
  public function setText($text)
  {
    $this->text = $text;
  }
  public function setType($type)
  {
    $this->type = $type;
  }
  public function setHeight($height)
  {
    $this->height = $height;
    $this->is_set_height = true;
  }
  private function getValueFromChar($ch)
  {
    $val = ord($ch);
    try
    {
      if ($this->type =='A')
      {
        if ($val > 95)
          throw new Exception(' illegal barcode character '.$ch.' for code128A in '.__FILE__.' on line '.__LINE__);
        if ($val < 32)
          $val += 64;
        else
          $val -=32;
      }
      elseif ($this->type =='B')
      {
        if ($val < 32 || $val > 127)
          throw new Exception(' illegal barcode character '.$ch.' for code128B in '.__FILE__.' on line '.__LINE__);
        else
          $val -=32;
      }
      else
      {
        if (!is_numeric($ch) || (int)$ch < 0 || (int)($ch) > 99)
          throw new Exception(' illegal barcode character '.$ch.' for code128C in '.__FILE__.' on line '.__LINE__);
        else
        {
          if (strlen($ch) ==1)
            $ch .='0';
          $val = (int)($ch);
        }
      }
    }
    catch(Exception $ex)
    {
      errorlog('die',$ex->getMessage());
    }
    return $val;
  }
  private function parseCode()
  {
    $this->type=='C'"Content-Type: image/".$image_type);
    }
    switch ($image_type)
    {
      case 'jpg':
      case 'jpeg':
        Imagejpeg($this->image,$file_name);
        break;
      case 'png':
        Imagepng($this->image,$file_name);
        break;
      case 'gif':
        break;
        Imagegif($this->image,$file_name);
      default:
        Imagepng($this->image,$file_name);
        break;
    }
  }
}
$barcode = new BarCode128('88888888');
$barcode->createBarCode();
"_blank" href="http://www.barcodebakery.com/" rel="external nofollow" >http://www.barcodebakery.com/


PS：这里再为大家推荐一款相似的条形码生成工具供大家参考使用：
在线条形码(一维码)生成/实时预览工具：

http://tools.jb51.net/aideddesign/tiaoxingma
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