php实现生成code128条形码的方法详解

更新时间：2020-03-21 23:36:28 作者：startmvc

本文实例讲述了php实现生成code128条形码的方法。分享给大家供大家参考，具体如下：效果

本文实例讲述了php实现生成code128条形码的方法。分享给大家供大家参考，具体如下：

效果图:


<?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 ='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()
 {
 $this->type=='C'?$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 ='png',$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 ($image_type)
 {
 case 'jpg':
 case 'jpeg':
 Imagejpeg($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();
?>

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