thinkphp3.2实现上传图片的控制器方法

public function file()
{
  $baseurl = str_replace('\', '/', dirname($_server['script_name']));
  import('org.net.uploadfile');
  import('org.util.services_json');
  $upload = new uploadfile();
  $upload->maxsize = 3145728;
  $upload->allowexts = array('jpg', 'gif', 'png', 'jpeg');
  $upload->savepath = './uploads/images/';
  $info = $upload->uploadone($_files['imgfile']);
  $file_url = $baseurl . 'uploads/images/' . $info['0']['savename'];
  if ($info) {
   header('content-type: text/html; charset=utf-8');
   $json = new services_json();
   echo $json->encode(array('error' => 0, 'url' => $file_url));
   exit;
  } else {
   $this->error($upload->geterrormsg());
  }
}
public function file_manager()
{
  import('org.util.services_json');
  $php_path = dirname(__file__) . '/';
  $php_url = dirname($_server['php_self']) . '/';
  $root_path = $php_path . './uploads/images/';
  $root_url = $php_url . './uploads/images/';
  $ext_arr = array('gif', 'jpg', 'jpeg', 'png', 'bmp');
  $dir_name = emptyempty($_get['dir']) ? '' : trim($_get['dir']);
  if (!in_array($dir_name, array('', 'image', 'flash', 'media', 'file'))) {
   echo "invalid directory name.";
   exit;
  }
  if ($dir_name !== '') {
   $root_path .= $dir_name . "/";
   $root_url .= $dir_name . "/";
   if (!file_exists($root_path)) {
    mkdir($root_path);
   }
  }
//根据path参数，设置各路径和url
  if (emptyempty($_get['path'])) {
   $current_path = realpath($root_path) . '/';
   $current_url = $root_url;
   $current_dir_path = '';
   $moveup_dir_path = '';
  } else {
   $current_path = realpath($root_path) . '/' . $_get['path'];
   $current_url = $root_url . $_get['path'];
   $current_dir_path = $_get['path'];
   $moveup_dir_path = preg_replace('/(.*?)[^/]+/$/', '$1', $current_dir_path);
  }
  echo realpath($root_path);
//排序形式，name or size or type
  $order = emptyempty($_get['order']) ? 'name' : strtolower($_get['order']);
//不允许使用..移动到上一级目录
  if (preg_match('/../', $current_path)) {
   echo 'access is not allowed.';
   exit;
  }
//最后一个字符不是/
  if (!preg_match('//$/', $current_path)) {
   echo 'parameter is not valid.';
   exit;
  }
//目录不存在或不是目录
  if (!file_exists($current_path) || !is_dir($current_path)) {
   echo 'directory does not exist.';
   exit;
  }
//遍历目录取得文件信息
  $file_list = array();
  if ($handle = opendir($current_path)) {
   $i = 0;
   while (false !== ($filename = readdir($handle))) {
    if ($filename{0} == '.') continue;
    $file = $current_path . $filename;
    if (is_dir($file)) {
     $file_list[$i]['is_dir'] = true; //是否文件夹
     $file_list[$i]['has_file'] = (count(scandir($file)) > 2); //文件夹是否包含文件
     $file_list[$i]['filesize'] = 0; //文件大小
     $file_list[$i]['is_photo'] = false; //是否图片
     $file_list[$i]['filetype'] = ''; //文件类别，用扩展名判断
    } else {
     $file_list[$i]['is_dir'] = false;
     $file_list[$i]['has_file'] = false;
     $file_list[$i]['filesize'] = filesize($file);
     $file_list[$i]['dir_path'] = '';
     $file_ext = strtolower(pathinfo($file, pathinfo_extension));
     $file_list[$i]['is_photo'] = in_array($file_ext, $ext_arr);
     $file_list[$i]['filetype'] = $file_ext;
    }
    $file_list[$i]['filename'] = $filename; //文件名，包含扩展名
    $file_list[$i]['datetime'] = date('y-m-d h:i:s', filemtime($file)); //文件最后修改时间
    $i++;
   }
   closedir($handle);
  }
//排序
  usort($file_list, 'cmp_func');
  $result = array();
//相对于根目录的上一级目录
  $result['moveup_dir_path'] = $moveup_dir_path;
//相对于根目录的当前目录
  $result['current_dir_path'] = $current_dir_path;
//当前目录的url
  $result['current_url'] = $current_url;
//文件数
  $result['total_count'] = count($file_list);
//文件列表数组
  $result['file_list'] = $file_list;
//输出json字符串
  header('content-type: application/json; charset=utf-8');
  $json = new services_json();
  echo $json->encode($result);
}