PHP 验证码如何生成类完整代码

1、 PHP 验证码如何生成类完整代码清源分享给大家的这款php 验证码生成类灵活好用，用户可以定义各个成员 有宽、高、画布、字数、类型、画类型同时我们只要修改 $Type就可以定义生成的是纯数字 , 纯小写字母, 大小写数字混合，有需要的朋友可以借鉴参考。代码：width = $num*20;$this->height = $height;$this->num = $num;$this->imgType = $imgType;$this->Type = $Type;$this->codestr = $this->codestr(;$this->zuhe(

2、;/ 2. 定义随机获取字符串函数private function codestr(switch($this->Typecase 1: / 类型为1 获取1-9随机数$str = implode("",array_rand(range(0,9,$this->num;break;case 2: / 类型为2 获取a-z 随机小写字母$str = implode("",array_rand(array_flip(range(a,z,$this->num;break; （PS ：T 不错的PHP Q扣峮：276167802，验证：wk ）ca

3、se 3: / 类型为3 获取数字, 小写字母, 大写字母 混合for($i=0;$i<$this->num;$i+$m = rand(0,2;switch($mcase 0:$o = rand(48,57;break;case 1: $o = rand(65,90;break;case 2:$o = rand(97,122;break;$str .= sprintf("%c",$o;break;return $str;/ 3. 初始化画布图像资源private function Hb($this->hb = imagecreatetruecolor($t

4、his->width,$this->height;/ 4. 生成背景颜色private function Bg(return imagecolorallocate($this->hb,rand(130,250,rand(130,250,rand(130,250; / 5. 生成字体颜色private function Font(return imagecolorallocate($this->hb,rand(0,100,rand(0,100,rand(0,100;/ 6. 填充背景颜色private function BgColor(imagefilledrectang

5、le($this->hb,0,0,$this->width,$this->height,$this->Bg(;/ 7. 干扰点private function ganrao($sum=floor($this->width*($this->height/3;for($i=0;$i<$sum;$i+imagesetpixel($this->hb,rand(0,$this->width,rand(0,$this->height,$this->Bg(; / 8. 随机直线 弧线private function huxian(for($i

6、=0;$i<$this->num;$i+imageArc($this->hb,rand(0,$this->width,rand(0,$this->height,rand(0,$this->width,rand(0,$this->height,rand(0,360,rand(0,360,$this->Bg(;/ 9. 写字private function xiezi( for($i=0;$i<$this->num;$i+$x=ceil($this->width/$this->num*$i;$y=rand(1,$this-&g

7、t;height-15;imagechar($this->hb,5,$x+4,$y,$this->codestr$i,$this->Font(; / 10. 输出private function OutImg($shuchu="image".$this->imgType;$header="Content-type:image/".$this->imgType;if(function_exists($shuchuheader($header;$shuchu($this->hb;elseexit("GD库没有此类图像"/ 11. 拼装private function zuhe($this->Hb(;$this->BgColor(;$this->ganrao(;$t