表单代码    <form name="form1" method="post" action="admin_upfile.php" enctype="multipart/form-data">      <input type="file" name="pic">      <input type="submit" name="Submit" value="开始上传" class="button">  </form>  

<?php                  //这里上传 $upsize判断上传文件的大小                  $uppath = "/attached/"; //文件上传路径                  //转换根目录的路径                  if (strpos($uppath, "/") == 0)                  {                      $i = 0;                      $thpath = $_SERVER["SCRIPT_NAME"];                      $thpath = substr($thpath, 1, strlen($thpath));                      while (strripos($thpath, "/") !== false)                      {                          $thpath = substr($thpath, strpos($thpath, "/") + 1, strlen($thpath));                          $i = ++$i;                      }                        $pp = "";                      for ($j = 0; $j < $i; ++$j)                      {                          $pp .= "../";                      }                        $uppaths = $pp . substr($uppath, 1, strlen($thpath));                  }                  $filename = date("y-m-d");                  if (is_dir($uppaths . $filename) != TRUE)                      mkdir($uppaths . $filename, 0777);                    $f = $_FILES['pic'];                    if ($f["type"] != "image/gif" && $f["type"] != "image/pjpeg" && $f["type"] != "image/jpeg" && $f["type"] != "image/x-png")                  {                      echo "<script>alert('只能上传图片格式的文件');window.close()</script>";                      return false;                  }                    //获得文件扩展名                  $temp_arr = explode(".", $f["name"]);                  $file_ext = array_pop($temp_arr);                  $file_ext = trim($file_ext);                  $file_ext = strtolower($file_ext);                    //新文件名                  $new_file_name = md5(date("YmdHis")) . '.' . $file_ext;                    echo $dest = $uppaths . $filename . "/" . date("ymdhis") . "_" . $new_file_name; //设置文件名为日期加上文件名避免重复 上传目录                  echo $dest1 = $uppath . $filename . "/" . date("ymdhis") . "_" . $new_file_name; //设置文件名为日期加上文件名避免重复                  $r = move_uploaded_file($f['tmp_name'], $dest);                  ?>