php实现生成code128条形码的方法详解

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(); ?>

附加一个强大的条码生成扩展包：
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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希望本文所述对大家PHP程序设计有所帮助。

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方法 code128 条形码 PHP