通过PHP上传文件不起作用 [英] Uploading file via PHP, doesn't work

问题描述

我从此页面复制了代码: http://www.w3schools.com/php/php_file_upload.asp

I copied the code from this page: http://www.w3schools.com/php/php_file_upload.asp

问题是上传文件时没有出现错误，而是 显示哪个应该正确:

Problem is that i don't get an error when uploading a file, instead this shows which should be correct:

上传:images.jpeg 类型:图片/jpeg 大小:5.8603515625 kB 临时文件:/tmp/phpZ67YXk 存储在:upload/images.jpeg

Upload: images.jpeg Type: image/jpeg Size: 5.8603515625 kB Temp file: /tmp/phpZ67YXk Stored in: upload/images.jpeg

但是没有文件保存在服务器上.

But no file is saved on the server.

我不知道出什么问题了，但是我在考虑许可的问题，仍然有一个文件夹 具有777权限的命名上传.

I don't know what is wrong but I'm thinking in terms of permission, still there is a folder named upload with 777 permissions.

这些php文件托管在在线虚拟主机上，因此我不在本地运行.

These php-files are hosted on a online web host so I don't run this locally.

HTML表单

HTML-form

<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

upload_file.php

<?php
$allowedExts = array("jpg", "jpeg", "gif", "png");
$extension = end(explode(".", $_FILES["file"]["name"]));
if ((($_FILES["file"]["type"] == "image/gif")
|| ($_FILES["file"]["type"] == "image/jpeg")
|| ($_FILES["file"]["type"] == "image/png")
|| ($_FILES["file"]["type"] == "image/pjpeg"))
&& ($_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";
  }
?>

推荐答案

我认为问题出在您的目标相对路径(相对于您当前的工作目录= .php文件的路径)，请尝试使其为绝对值像这样:

I suppose the problem is in your relative path of destination (relative according to your current working directory = path of your .php file), try to make it absolutem like this:

move_uploaded_file(
  $_FILES["file"]["tmp_name"],
  $_SERVER['DOCUMENT_ROOT'] . 'upload/' . $_FILES["file"]["name"]
);

这篇关于通过PHP上传文件不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！