php PHP无法上传文件到服务器？
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PHP can't upload files to server?
提问by J_rad
I have a php file that uploads images like jpegs and png onto a folder called uploads that is stored on the apache server and in the same location as the php file.
我有一个 php 文件，可以将 jpegs 和 png 等图像上传到一个名为 uploads 的文件夹中，该文件夹存储在 apache 服务器上，并且与 php 文件位于同一位置。
I have checked the code of both the HTML and the PHP and both seem to be perfectly fine, however whenever I try to upload a file I always get an error message and the file doesn't get uploaded.
我已经检查了 HTML 和 PHP 的代码，两者似乎都很好，但是每当我尝试上传文件时，我总是收到一条错误消息并且文件没有上传。
It would be much appreciated if someone with more experience than me can look at my code and tell me why it is behaving in this manner.
如果有比我更有经验的人可以查看我的代码并告诉我为什么它会以这种方式运行，我将不胜感激。
Here is the HTML form:
这是 HTML 表单：
<!--
To change this template, choose Tools | Templates
and open the template in the editor.
-->
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Upload Your File</title>
</head>
<body>
<?php
// put your code here
?>
<form enctype="multipart/form-data" method="post" action="fileHandler.php">
Select File:
<input name="uploaded_file" type="file"/><br/>
<input type="submit" value="Upload"/>
</form>
</body>
</html>
and here is the PHP file that is executed when the form is submitted:
这是提交表单时执行的 PHP 文件：
<?php
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
* PHP file that uploads files and handles any errors that may occur
* when the file is being uploaded. Then places that file into the
* "uploads" directory. File cannot work is no "uploads" directory is created in the
* same directory as the function.
*/
$fileName = $_FILES["uploaded_file"]["name"];//the files name takes from the HTML form
$fileTmpLoc = $_FILES["uploaded_file"]["tmp_name"];//file in the PHP tmp folder
$fileType = $_FILES["uploaded_file"]["type"];//the type of file
$fileSize = $_FILES["uploaded_file"]["size"];//file size in bytes
$fileErrorMsg = $FILES["uploaded_file"]["error"];//0 for false and 1 for true
$target_path = "uploads/" . basename( $_FILES["uploaded_file"]["name"]);
echo "file name: $fileName </br> temp file location: $fileTmpLoc<br/> file type: $fileType<br/> file size: $fileSize<br/> file upload target: $target_path<br/> file error msg: $fileErrorMsg<br/>";
//START PHP Image Upload Error Handling---------------------------------------------------------------------------------------------------
if(!$fileTmpLoc)//no file was chosen ie file = null
{
echo "ERROR: Please select a file before clicking submit button.";
exit();
}
else
if(!$fileSize > 16777215)//if file is > 16MB (Max size of MEDIUMBLOB)
{
echo "ERROR: Your file was larger than 16 Megabytes";
unlink($fileTmpLoc);//remove the uploaded file from the PHP folder
exit();
}
else
if(!preg_match("/\.(gif|jpg|jpeg|png)$/i", $fileName))//this codition allows only the type of files listed to be uploaded
{
echo "ERROR: Your image was not .gif, .jpg, .jpeg or .png";
unlink($fileTmpLoc);//remove the uploaded file from the PHP temp folder
exit();
}
else
if($fileErrorMsg == 1)//if file uploaded error key = 1 ie is true
{
echo "ERROR: An error occured while processing the file. Please try again.";
exit();
}
//END PHP Image Upload Error Handling---------------------------------------------------------------------------------------------------------------------
//Place it into your "uploads" folder using the move_uploaded_file() function
$moveResult = move_uploaded_file($fileTmpLoc, $target_path);
//Check to make sure the result is true before continuing
if($moveResult != true)
{
echo "ERROR: File not uploaded. Please Try again.";
unlink($fileTmpLoc);//remove the uploaded file from the PHP temp folder
}
else
{
//Display to the page so you see what is happening
echo "The file named <strong>$fileName</strong> uploaded successfully.<br/><br/>";
echo "It is <strong>$fileSize</strong> bytes.<br/><br/>";
echo "It is a <strong>$fileType</strong> type of file.<br/><br/>";
echo "The Error Message output for this upload is: $fileErrorMsg";
}
?>
采纳答案by Brombomb
make sure that the directory structure has write permissions. You can check within php by using is_writeable. By checking from within PHP you will also be making sure that the PHP user has write access.
确保目录结构具有写权限。您可以使用is_writeable在 php 中进行检查。通过在 PHP 内部进行检查，您还将确保 PHP 用户具有写入权限。
回答by adamdehaven
Check the folder permissions on the server. If incorrect, you can modify your php.ini file.
检查服务器上的文件夹权限。如果不正确，您可以修改您的 php.ini 文件。
