上传avi php错误

Question

我得到以下错误

     ( ! ) Notice: Undefined index: file in C:\wamp\www\upload_file.php on line 18 Call Stack
#   Time    Memory  Function    Location 1  0.0003  377944  {main}( )   ..\upload_file.php:0

( ! ) Notice: Undefined index: file in C:\wamp\www\upload_file.php on line 24 Call Stack
#   Time    Memory  Function    Location 1  0.0003  377944  {main}( )   ..\upload_file.php:0 Upload:

( ! ) Notice: Undefined index: file in C:\wamp\www\upload_file.php on line 25 Call Stack
#   Time    Memory  Function    Location 1  0.0003  377944  {main}( )   ..\upload_file.php:0 Type:

( ! ) Notice: Undefined index: file in C:\wamp\www\upload_file.php on line 26 Call Stack
#   Time    Memory  Function    Location 1  0.0003  377944  {main}( )   ..\upload_file.php:0 Size: 0 Kb

( ! ) Notice: Undefined index: file in C:\wamp\www\upload_file.php on line 27 Call Stack
#   Time    Memory  Function    Location 1  0.0003  377944  {main}( )   ..\upload_file.php:0 Temp file:

( ! ) Notice: Undefined index: file in C:\wamp\www\upload_file.php on line 29 Call Stack
#   Time    Memory  Function    Location 1  0.0003  377944  {main}( )   ..\upload_file.php:0

( ! ) Notice: Undefined index: file in C:\wamp\www\upload_file.php on line 31 Call Stack
#   Time    Memory  Function    Location 1  0.0003  377944  {main}( )   ..\upload_file.php:0 already exists.

现在，处理文件上传的文件如下所示

?php session_start();

ini_set('memory_limit', "400M");
ini_set('max_execution_time', "900");
ini_set('upload_max_filesize', "400M");
ini_set('post_max_size', "400M");



$user=$_SESSION['MM_Username'];

$path="video". "\\" . $user . "\\";

if(!(is_dir($path))){
mkdir(dirname(__FILE__) . "\\". $path,0777);
}

  if ($_FILES["file"]["error"] > 0)
    {
    echo "Return Code: " . $_FILES["file"]["error"] . "<br />";
    }
  else
    {
    echo "Upload: " . $_FILES["file"]["name"] . "<br />";
    echo "Type: " . $_FILES["file"]["type"] . "<br />";
    echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br />";
    echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br />";

    if (file_exists($path . $_FILES["file"]["name"]))
      {
      echo $_FILES["file"]["name"] . " already exists. ";
      }
    else
      {
      move_uploaded_file($_FILES["file"]["tmp_name"],
      $path. $_FILES["file"]["name"]);
      echo "Stored !";
      }
    }

?> 

如果我尝试上传一张图片，一切都很好，但是当我尝试上传300MB的电影剪辑时，它给出了上面发布的错误，我已经更改了wamp服务器上的php.ini文件，它允许上传更大的文件，但仍然没有结果，有人知道出了什么问题吗？

Answer 1

表单上缺少enctype属性。

Answer 2

代码中的另一个问题是，您甚至不检查$_FILES[]数组中是否存在'file‘索引。如果没有，您应该将其报告为错误，而不是尝试使用其内容。总的来说，这是一种更好的方法:在尝试使用表单之前，检查表单中的每个字段是否都存在。