PHP implements verification code class

This article mainly introduces the use of php to implement the verification code class, which has certain reference value. Now I share it with everyone. Friends in need can refer to it

width = $num*20; $this->height = $height; $this->num = $num; $this->imgType = $imgType; $this->Type = $Type; $this->codestr = $this->codestr(); $this->zuhe(); } // 2. 定义随机获取字符串函数 private function codestr(){ switch($this->Type){ case 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; case 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++){ $m = rand(0,2); switch($m){ case 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(){ $this->hb = imagecreatetruecolor($this->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($this->hb,rand(0,100),rand(0,100),rand(0,100)); } // 6. 填充背景颜色 private function BgColor(){ imagefilledrectangle($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=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->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($shuchu)){ header($header); $shuchu($this->hb); }else{ exit("GD库没有此类图像"); } } // 11. 拼装 private function zuhe(){ $this->Hb(); $this->BgColor(); $this->ganrao(); $this->huxian(); $this->xiezi(); $this->OutImg(); } public function getCodeStr(){ return $this->codestr; } } $a = new Code(); $a ->getCodeStr(); ?>

Related recommendations:

Use PHP to implement a single linked list

php implements the Fibonacci sequence implementation

The above is the detailed content of PHP implements verification code class. For more information, please follow other related articles on the PHP Chinese website!