PHP はグラフィック検証コードを生成します (拡張干渉タイプ)

font = '/outputs/font/font.ttf'; } //创建4个随机码 private function createCode() { $_leng = strlen($this->charset) - 1; for ($i = 1; $i <= $this->codelen; $i++) { $this->code .= $this->charset[mt_rand(0, $_leng)]; } // session_start(); // $_SESSION['VerifyCode'] = strtolower($this->code); Session::set('VerifyCode', strtolower($this->code)); return $this->code; } //创建背景 private function createBg() { //创建画布 给一个资源jubing $this->img = imagecreatetruecolor($this->width, $this->height); //背景颜色 $color = imagecolorallocate($this->img, mt_rand(157, 255), mt_rand(157, 255), mt_rand(157, 255)); //画出一个矩形 imagefilledrectangle($this->img, 0, $this->height, $this->width, 0, $color); } //创建字体 private function createFont() { $_x = ($this->width / $this->codelen); //字体长度 for ($i = 0; $i < $this->codelen; $i++) { //文字颜色 $color = imagecolorallocate($this->img, mt_rand(0, 156), mt_rand(0, 156), mt_rand(0, 156)); //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 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]); } } //随机线条 private function createLine() { //随机线条 for ($i = 0; $i < 6; $i++) { $color = imagecolorallocate($this->img, mt_rand(0, 156), mt_rand(0, 156), mt_rand(0, 156)); imageline($this->img, mt_rand(0, $this->width), mt_rand(0, $this->height), mt_rand(0, $this->width), mt_rand(0, $this->height), $color); } //随机雪花 for ($i = 0; $i < 45; $i++) { $color = imagecolorallocate($this->img, mt_rand(220, 255), mt_rand(220, 255), mt_rand(220, 255)); imagestring($this->img, mt_rand(1, 5), mt_rand(0, $this->width), mt_rand(0, $this->height), '*', $color); } } //输出背景 private function outPut() { //生成标头 header('Content-type:image/png'); //输出图片 imagepng($this->img); //销毁结果集 imagedestroy($this->img); } //对外输出 public function doimg() { //加载背景 $this->createBg(); //加载文件 $this->createCode(); //加载线条 $this->createLine(); //加载字体 $this->createFont(); //加载背景 $this->outPut(); } //获取验证码 public function getCode() { return strtolower($this->code); } //验证验证码 public function checkCode($code, $clear = false) { // session_start(); if (Session::get('VerifyCode') == strtolower($code)) { if($clear) $this->clearCode(); return true; } if($clear) $this->clearCode(); return false; } //清除验证码 public function clearCode() { Session::del('VerifyCode'); // session_start(); // unset ($_SESSION['VerifyCode']); } }

ob_clean(); $verify = new Code(); $verify->doimg();

//随机线条 private function createLine() { //随机线条 for ($i = 0; $i < 6; $i++) { $color = imagecolorallocate($this->img, mt_rand(0, 156), mt_rand(0, 156), mt_rand(0, 156)); imageline($this->img, mt_rand(0, $this->width), mt_rand(0, $this->height), mt_rand(0, $this->width), mt_rand(0, $this->height), $color); } //随机雪花 for ($i = 0; $i < 45; $i++) { $color = imagecolorallocate($this->img, mt_rand(220, 255), mt_rand(220, 255), mt_rand(220, 255)); imagestring($this->img, mt_rand(1, 5), mt_rand(0, $this->width), mt_rand(0, $this->height), '*', $color); } }

         
         

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//验证验证码 public function checkCode($code, $clear = false) { if (Session::get('VerifyCode') == strtolower($code)) { if($clear) $this->clearCode(); return true; } if($clear) $this->clearCode(); return false; } //清除验证码 public function clearCode() { Session::del('VerifyCode'); }