How to generate code128 barcode in php-PHP Tutorial-php.cn

How to generate code128 barcode in php

墨辰丷

Release： 2023-03-26 20:14:01

Original

2004 people have browsed it

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

The examples in this article describe PHP implements the method of generating code128 barcode. Share it with everyone for your reference, the details are as follows:

Rendering:

<?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();
?>

Copy after login

Related recommendations:

PHP is based on the phpqrcode class Detailed explanation of the steps to generate QR code

opcodedetailed explanation of cache usage in PHP

CodeIgniter uses redis steps explained in detail

The above is the detailed content of How to generate code128 barcode in php. For more information, please follow other related articles on the PHP Chinese website!