public function img()
 {
     //实例化图像处理类,默认为GD库
     $image = new Image();
     //加载一张预处理的图片
     $image->open('./Public/images/1.jpg');
     //上面两句,可以用一句话包含
     //$image = new Image(Image::IMAGE_GD, './Public/images/1.jpg');
     //获取图片信息
     $arr['width'] = $image->width();
     $arr['height'] = $image->height();
     $arr['type'] = $image->type();
     $arr['mime'] = $image->mime();
     $arr['size'] = $image->size();
     //裁剪图片,高400,宽400
     $image->crop(400, 400)->save('./Public/images/1.jpg');
     $image->open('./Public/images/2.jpg');
     $image->thumb(300, 300, Image::IMAGE_THUMB_CENTER)->save('./Public/images/2.jpg');
     //在图片右下角添加水印并生成
     $image->open('./Public/images/3.jpg');
     $image->water('./Public/images/logo.png')->save('./Public/images/3.jpg');
     echo '<pre>' . print_r($arr, 1) . '</pre>';
 }
 private function do_upload()
 {
     // Make sure file is not cached (as it happens for example on iOS devices)
     header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
     header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
     header("Cache-Control: no-store, no-cache, must-revalidate");
     header("Cache-Control: post-check=0, pre-check=0", false);
     header("Pragma: no-cache");
     if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
         exit;
         // finish preflight CORS requests here
     }
     if (!empty($_REQUEST['debug'])) {
         $random = rand(0, intval($_REQUEST['debug']));
         if ($random === 0) {
             header("HTTP/1.0 500 Internal Server Error");
             exit;
         }
     }
     @set_time_limit(5 * 60);
     $uploadBaseDir = DOCUMENT_ROOT . DIRECTORY_SEPARATOR . 'uploads' . DIRECTORY_SEPARATOR;
     $targetDir = $uploadBaseDir . 'tmp';
     $uploadDir = $uploadBaseDir . date('Y' . DIRECTORY_SEPARATOR . 'm');
     $cleanupTargetDir = true;
     // Remove old files
     $maxFileAge = 5 * 3600;
     // Temp file age in seconds
     // Create target dir
     if (!file_exists($targetDir)) {
         @mkdir($targetDir);
     }
     // Create target dir
     if (!file_exists($uploadDir)) {
         @mkdir($uploadDir, 0777, true);
     }
     // Get a file name
     //        if (isset($_REQUEST["name"])) {
     //            $fileName = $_REQUEST["name"];
     //        } elseif (!empty($_FILES)) {
     //            $fileName = $_FILES["file"]["name"];
     //        } else {
     //            $fileName = uniqid("file_");
     //        }
     $fileName = uniqid("pic_") . '.jpg';
     $md5File = @file($uploadBaseDir . 'md5list2.txt', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
     $md5File = $md5File ? $md5File : array();
     if (isset($_REQUEST["md5"]) && array_search($_REQUEST["md5"], $md5File) !== FALSE) {
         die('{"jsonrpc" : "2.0", "result" : null, "id" : "id", "exist": 1}');
     }
     $filePath = $targetDir . DIRECTORY_SEPARATOR . $fileName;
     $uploadPath = $uploadDir . DIRECTORY_SEPARATOR . $fileName;
     // Chunking might be enabled
     $chunk = isset($_REQUEST["chunk"]) ? intval($_REQUEST["chunk"]) : 0;
     $chunks = isset($_REQUEST["chunks"]) ? intval($_REQUEST["chunks"]) : 0;
     // Remove old temp files
     if ($cleanupTargetDir) {
         if (!is_dir($targetDir) || !($dir = opendir($targetDir))) {
             die('{"jsonrpc" : "2.0", "error" : {"code": 100, "message": "Failed to open temp directory."}, "id" : "id"}');
         }
         while (($file = readdir($dir)) !== false) {
             $tmpfilePath = $targetDir . DIRECTORY_SEPARATOR . $file;
             // If temp file is current file proceed to the next
             if ($tmpfilePath == "{$filePath}.part") {
                 continue;
             }
             // Remove temp file if it is older than the max age and is not the current file
             if (preg_match('/\\.part$/', $file) && filemtime($tmpfilePath) < time() - $maxFileAge) {
                 @unlink($tmpfilePath);
             }
         }
         closedir($dir);
     }
     // Open temp file
     if (!($out = @fopen("{$filePath}.part", $chunks ? "ab" : "wb"))) {
         die('{"jsonrpc" : "2.0", "error" : {"code": 102, "message": "Failed to open output stream."}, "id" : "id"}');
     }
     if (!empty($_FILES)) {
         if ($_FILES["file"]["error"] || !is_uploaded_file($_FILES["file"]["tmp_name"])) {
             die('{"jsonrpc" : "2.0", "error" : {"code": 103, "message": "Failed to move uploaded file."}, "id" : "id"}');
         }
         // Read binary input stream and append it to temp file
         if (!($in = @fopen($_FILES["file"]["tmp_name"], "rb"))) {
             die('{"jsonrpc" : "2.0", "error" : {"code": 101, "message": "Failed to open input stream."}, "id" : "id"}');
         }
     } else {
         if (!($in = @fopen("php://input", "rb"))) {
             die('{"jsonrpc" : "2.0", "error" : {"code": 101, "message": "Failed to open input stream."}, "id" : "id"}');
         }
     }
     while ($buff = fread($in, 4096)) {
         fwrite($out, $buff);
     }
     @fclose($out);
     @fclose($in);
     // Check if file has been uploaded
     if (!$chunks || $chunk == $chunks - 1) {
         // Strip the temp .part suffix off
         rename("{$filePath}.part", $filePath);
         rename($filePath, $uploadPath);
         array_push($md5File, $this->mymd5($uploadPath));
         $md5File = array_unique($md5File);
         file_put_contents($uploadBaseDir . 'md5list2.txt', join($md5File, "\n"));
     }
     // Return Success JSON-RPC response
     $img = new Image();
     $img->open($uploadPath);
     $img->thumb(800, 800);
     $img->save($uploadPath);
     $imgSize = $img->size();
     $file_path = strtr($uploadPath, array(DOCUMENT_ROOT => '', '\\' => '/'));
     $photoData = array('uid' => $this->uid, 'file_path' => $file_path, 'status' => 1, 'w' => $imgSize[0], 'h' => $imgSize[1]);
     $pid = D('Photo')->add($photoData);
     $this->responseSuccess(compact('pid') + $photoData);
 }