时间:2021-07-01 10:21:17 帮助过:24人阅读
前一段时间我写了个验证码函数, 今天做成了验证码类 有助于面向对象编程。
img.php
1 font=ROOT_PATH.'/font/elephant.ttf';24 }25 //创建4个随机码26 private function createCode(){27 $_leng=strlen($this->charset);28 for($i=1;$i<=$this->codelen;$i++){29 $this->code.=$this->charset[mt_rand(0,$_leng)];30 }31 return $this->code;32 }33 34 //创建背景35 private function createBg(){36 //创建画布 给一个资源jubing37 $this->img=imagecreatetruecolor($this->width,$this->height);38 //背景颜色39 $color=imagecolorallocate($this->img,mt_rand(157,255),mt_rand(157,255),mt_rand(157,255));40 //画出一个矩形41 imagefilledrectangle($this->img,0,$this->height,$this->width,0,$color);42 }43 44 //创建字体45 private function createFont(){46 $_x=($this->width / $this->codelen); //字体长度47 for ($i=0;$i<$this->codelen;$i++){48 //文字颜色49 $color=imagecolorallocate($this->img,mt_rand(0,156),mt_rand(0,156),mt_rand(0,156));50 //资源句柄 字体大小 倾斜度 字体长度 字体高度 字体颜色 字体 具体文本51 imagettftext($this->img,$this->fontsize,mt_rand(-30,30),$_x*$i+mt_rand(1,5),$this->height/1.4,$color,$this->font,$this->code[$i]);52 }53 }54 //随机线条55 private function createLine(){56 //随机线条57 for ($i=0;$i<6;$i++){58 $color = imagecolorallocate($this->img,mt_rand(0,156),mt_rand(0,156),mt_rand(0,156));59 imageline($this->img,mt_rand(0,$this->width),mt_rand(0,$this->height),mt_rand(0,$this->width),mt_rand(0,$this->height),$color);60 }61 //随机雪花62 for ($i=0;$i<45;$i++){63 $color = imagecolorallocate($this->img,mt_rand(220,255),mt_rand(220,255),mt_rand(220,255));64 imagestring($this->img,mt_rand(1,5),mt_rand(0,$this->width),mt_rand(0,$this->height),'*',$color);65 }66 }67 //输出背景68 private function outPut(){69 //生成标头70 header('ContentType:img/png');71 //输出图片72 imagepng($this->img);73 //销毁结果集74 imagedestroy($this->img);75 }76 //对外输出77 public function doimg(){78 //加载背景79 $this->createBg();80 //加载文件81 $this->createCode();82 //加载线条83 $this->createLine();84 //加载字体85 $this->createFont();86 //加载背景87 $this->outPut();88 }89 90 //获取验证码91 public function getCode(){92 return strtolower($this->code);93 }94 95 }96 97 ?>
其他页面调用方法
index.php
require 'img.php';
$img=new ValidateCode();
echo $img->doimg();
?>
过往云烟 2011/07/29
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http://biancheng.dnbcw.info/php/341730.html pageNo:6