PHP generated code128 barcode example sharing

This article mainly introduces the method of generating code128 barcode in PHP. It also gives the definition and usage of PHP barcode generation class in the form of a complete example. Friends who need it can refer to it. I hope it can help everyone.

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<?php
class BarCode128 {
  const STARTA = 103;
  const STARTB = 104;
  const STARTC = 105;
  const STOP = 106;
  private $unit_width = 1; //单位宽度 缺省1个象素
  private $is_set_height = false;
  private $width = -1;
  private $heith = 35;
  private $quiet_zone = 6;
  private $font_height = 15;
  private $font_type = 4;
  private $color =0x000000;
  private $bgcolor =0xFFFFFF;
  private $image = null;
  private $codes = array("212222","222122","222221","121223","121322","131222","122213","122312","132212","221213","221312","231212","112232","122132","122231","113222","123122","123221","223211","221132","221231","213212","223112","312131","311222","321122","321221","312212","322112","322211","212123","212321","232121","111323","131123","131321","112313","132113","132311","211313","231113","231311","112133","112331","132131","113123","113321","133121","313121","211331","231131","213113","213311","213131","311123","311321","331121","312113","312311","332111","314111","221411","431111","111224","111422","121124","121421","141122","141221","112214","112412","122114","122411","142112","142211","241211","221114","413111","241112","134111","111242","121142","121241","114212","124112","124211","411212","421112","421211","212141","214121","412121","111143","111341","131141","114113","114311","411113","411311","113141","114131","311141","411131","211412","211214","211412","2331112");
  private $valid_code = -1;
  private $type =&#39;B&#39;;
  private $start_codes =array(&#39;A&#39;=>self::STARTA,&#39;B&#39;=>self::STARTB,&#39;C&#39;=>self::STARTC);
  private $code =&#39;&#39;;
  private $bin_code =&#39;&#39;;
  private $text =&#39;&#39;;
  public function __construct($code=&#39;&#39;,$text=&#39;&#39;,$type=&#39;B&#39;)
  {
    if (in_array($type,array(&#39;A&#39;,&#39;B&#39;,&#39;C&#39;)))
      $this->setType($type);
    else
      $this->setType(&#39;B&#39;);
    if ($code !==&#39;&#39;)
      $this->setCode($code);
    if ($text !==&#39;&#39;)
      $this->setText($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 !=&#39;&#39;)
    {
      $this->code= $code;
      if ($this->text ===&#39;&#39;)
        $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 ($this->type ==&#39;A&#39;)
      {
        if ($val > 95)
          throw new Exception(&#39; illegal barcode character &#39;.$ch.&#39; for code128A in &#39;.__FILE__.&#39; on line &#39;.__LINE__);
        if ($val < 32)
          $val += 64;
        else
          $val -=32;
      }
      elseif ($this->type ==&#39;B&#39;)
      {
        if ($val < 32 || $val > 127)
          throw new Exception(&#39; illegal barcode character &#39;.$ch.&#39; for code128B in &#39;.__FILE__.&#39; on line &#39;.__LINE__);
        else
          $val -=32;
      }
      else
      {
        if (!is_numeric($ch) || (int)$ch < 0 || (int)($ch) > 99)
          throw new Exception(&#39; illegal barcode character &#39;.$ch.&#39; for code128C in &#39;.__FILE__.&#39; on line &#39;.__LINE__);
        else
        {
          if (strlen($ch) ==1)
            $ch .=&#39;0&#39;;
          $val = (int)($ch);
        }
      }
    }
    catch(Exception $ex)
    {
      errorlog(&#39;die&#39;,$ex->getMessage());
    }
    return $val;
  }
  private function parseCode()
  {
    $this->type==&#39;C&#39;?$step=2:$step=1;
    $val_sum = $this->start_codes[$this->type];
    $this->width = 35;
    $this->bin_code = $this->codes[$val_sum];
    for($i =0;$i<strlen($this->code);$i+=$step)
    {
      $this->width +=11;
      $ch = substr($this->code,$i,$step);
      $val = $this->getValueFromChar($ch);
      $val_sum += $val;
      $this->bin_code .= $this->codes[$val];
    }
    $this->width *=$this->unit_width;
    $val_sum = $val_sum%103;
    $this->valid_code = $val_sum;
    $this->bin_code .= $this->codes[$this->valid_code];
    $this->bin_code .= $this->codes[self::STOP];
  }
  public function getValidCode()
  {
    if ($this->valid_code == -1)
      $this->parseCode();
    return $this->valid_code;
  }
  public function getWidth()
  {
    if ($this->width ==-1)
      $this->parseCode();
    return $this->width;
  }
  public function getHeight()
  {
    if ($this->width ==-1)
      $this->parseCode();
    return $this->height;
  }
  public function createBarCode($image_type =&#39;png&#39;,$file_name=null)
  {
    $this->parseCode();
    $this->image = ImageCreate($this->width+2*$this->quiet_zone,$this->heith + $this->font_height);
    $this->bgcolor = imagecolorallocate($this->image,$this->bgcolor >> 16,($this->bgcolor >> 8)&0x00FF,$this->bgcolor & 0xFF);
    $this->color = imagecolorallocate($this->image,$this->color >> 16,($this->color >> 8)&0x00FF,$this->color & 0xFF);
    ImageFilledRectangle($this->image, 0, 0, $this->width + 2*$this->quiet_zone,$this->heith + $this->font_height, $this->bgcolor);
    $sx = $this->quiet_zone;
    $sy = $this->font_height -1;
    $fw = 10; //編號為2或3的字體的寬度為10，為4或5的字體寬度為11
    if ($this->font_type >3)
    {
      $sy++;
      $fw=11;
    }
    $ex = 0;
    $ey = $this->heith + $this->font_height - 2;
    for($i=0;$i<strlen($this->bin_code);$i++)
    {
      $ex = $sx + $this->unit_width*(int) $this->bin_code{$i} -1;
      if ($i%2==0)
        ImageFilledRectangle($this->image, $sx, $sy, $ex,$ey, $this->color);
      $sx =$ex + 1;
    }
    $t_num = strlen($this->text);
    $t_x = $this->width/$t_num;
    $t_sx = ($t_x -$fw)/2;    //目的为了使文字居中平均分布
    for($i=0;$i<$t_num;$i++)
    {
      imagechar($this->image,$this->font_type,6*$this->unit_width +$t_sx +$i*$t_x,0,$this->text{$i},$this->color);
    }
    if (!$file_name)
    {
      header("Content-Type: image/".$image_type);
    }
    switch ($image_type)
    {
      case &#39;jpg&#39;:
      case &#39;jpeg&#39;:
        Imagejpeg($this->image,$file_name);
        break;
      case &#39;png&#39;:
        Imagepng($this->image,$file_name);
        break;
      case &#39;gif&#39;:
        break;
        Imagegif($this->image,$file_name);
      default:
        Imagepng($this->image,$file_name);
        break;
    }
  }
}
$barcode = new BarCode128(&#39;88888888&#39;);
$barcode->createBarCode();
?>

Attach a powerful barcode generation expansion package:

http:// www.barcodebakery.com/

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