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：

　　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：

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　　希望本文所述对大家PHP程序设计有所帮助。