/**     * 上传图片api     *      */    public function upload(){        $result = array('code' => 0, 'message' => 'ok');        ini_set('upload_max_filesize', '20M');        ini_set('post_max_size', '20M');        ini_set('memory_limit', '128M');        //接收上传的远程地址        $url = isset($_POST['url']) ? trim($_POST['url']) : '';        if (empty($url)) {            $result['code'] = 40001;            $result['message'] = 'url不能为空';            Helper_Http::writeJson(200,$result);        }        $file = $_FILES['file'];        if ($file['error'] != 0) {            $result['code'] = 40001;            $result['message'] = '上传出错';            Helper_Http::writeJson(200,$result);        } else {            $filename = $file['name'];            $tmpfile = $file['tmp_name'];            $filetype = $file['type'];            $data = $this->upload_file($url, $filename, $tmpfile, $filetype);            echo $data;            die;        }    }            /**     * curl上传文件     *      * @param unknown $url     * @param unknown $filename     * @param unknown $path     * @param unknown $type     */    function upload_file($url,$filename,$path,$type){        //php 5.5以上的用法        if (class_exists('\CURLFile')) {            $data = array('file' => new \CURLFile(realpath($path),$type,$filename));        } else {            $data = array(                'file'=>'@'.realpath($path).";type=".$type.";filename=".$filename            );        }        $ch = curl_init();        curl_setopt($ch, CURLOPT_URL, $url);        curl_setopt($ch, CURLOPT_POST, true );        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);        curl_setopt($ch, CURLOPT_HEADER, false);        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);        $return_data = curl_exec($ch);        curl_close($ch);        echo $return_data;    }

 远程代码的处理逻辑跟上传文件逻辑一样，这中间其实是有两部上传。