Question

当我上传文件时，结果为空。代码来自here。

index.html文件：

<html>
<body>

<form action="upload_file.php" method="post"
enctype="multipart/form-data">
<label for="file">Filename:</label>
<input type="file" name="file" id="file"><br>
<input type="submit" name="submit" value="Submit">
</form>

</body>
</html>

upload_file.php：

<?php
  echo "Upload: " . $_FILES['file']['name'] . "<br>";
?>

结果是：

上载：

我配置我的php.ini，也启用file_upload，内存5000M和tmp位置。

我不知道它是maters但我使用的是Ubuntu。

phpinfo的结果就像我配置的那样。

怎么了？谢谢！

print_r是show Array（）

echo $ _FILES ['userfile'] ['error'];

HP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626+lfs/msql.so' - /usr/lib/php5/20090626+lfs/msql.so: cannot open shared object file: No such file or directory in Unknown on line 0
    [Wed Mar 05 17:48:16 2014] [notice] Apache/2.2.22 (Ubuntu) PHP/5.3.10-1ubuntu3.10 with Suhosin-Patch configured -- resuming normal operations
    [Wed Mar 05 17:50:05 2014] [error] [client 127.0.0.1] File does not exist: /var/www/favicon.ico
    [Wed Mar 05 17:50:05 2014] [error] [client 127.0.0.1] File does not exist: /var/www/404.html
    [Wed Mar 05 17:55:32 2014] [error] [client 127.0.0.1] PHP Notice:  Undefined index: file in /var/www/uploadart.php on line 2, referer: http://localhost/index.php

在原始文件中，错误日志为空。

Answer 1

“当我上传文件时，结果为空。代码来自here。”

您说从W3Schools获取的代码不是您为代码发布的代码，而且您提到的代码仅为：

<?php
  echo "Upload: " . $_FILES['file']['name'] . "<br>";
?>

W3Schools在其页面上（来自您提供的链接）的内容如下：

HTML表单：

<html>
<body>

<form action="upload_file.php" method="post"
enctype="multipart/form-data">
<label for="file">Filename:</label>
<input type="file" name="file" id="file"><br>
<input type="submit" name="submit" value="Submit">
</form>

</body>
</html>

PHP

<?php
if ($_FILES["file"]["error"] > 0)
  {
  echo "Error: " . $_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 "Stored in: " . $_FILES["file"]["tmp_name"];
  }
?>

然而，缺少最重要的组件move_uploaded_file()

包含在保存上传的文件下的页面下方，如下所示:(假设您只想在数组中允许("gif", "jpeg", "jpg", "png")。

<?php
$allowedExts = array("gif", "jpeg", "jpg", "png");
$temp = explode(".", $_FILES["file"]["name"]);
$extension = end($temp);
if ((($_FILES["file"]["type"] == "image/gif")
|| ($_FILES["file"]["type"] == "image/jpeg")
|| ($_FILES["file"]["type"] == "image/jpg")
|| ($_FILES["file"]["type"] == "image/pjpeg")
|| ($_FILES["file"]["type"] == "image/x-png")
|| ($_FILES["file"]["type"] == "image/png"))
&& ($_FILES["file"]["size"] < 20000)
&& in_array($extension, $allowedExts))
  {
  if ($_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("upload/" . $_FILES["file"]["name"]))
      {
      echo $_FILES["file"]["name"] . " already exists. ";
      }
    else
      {
      move_uploaded_file($_FILES["file"]["tmp_name"],
      "upload/" . $_FILES["file"]["name"]);
      echo "Stored in: " . "upload/" . $_FILES["file"]["name"];
      }
    }
  }
else
  {
  echo "Invalid file";
  }
?>

现在，您需要创建一个名为upload的文件夹，然后从根目录运行表单和PHP，并确保该文件夹存在且具有正确的写入权限。

Answer 2

你的代码很好。问题必须与服务器上的配置有关。在php.ini中检查这一行：

file_uploads，upload_max_filesize，upload_tmp_dir，post_max_size，max_input_time

你也可以回应这一行：

$_FILES['userfile']['error']

Php文件上传始终为空

2 个答案: