嗨，我是 PHP 新手（我是一名 asp.net 开发人员），刚刚切换到 PHP，因为我需要为我的朋友开发一个网站。我目前正在尝试将音乐文件上传到我网站上的文件夹中，但不断收到此错误：
注意：“未定义的索引：第 5 行 C:\xampp\htdocs\sitename\admin\uploader.php 中的上传文件”
我尝试了以下步骤：
- 将 max_upload_filesize 和 post_max_size 设置为“1028M”。
- 在我的表单标签中添加了“enctype="multipart/form-data"。
- 试过“print_r($_FILES);” 并且数组继续返回空。
- 在新网站中使用了上传脚本，它工作正常。
- 在线尝试了很多不同的脚本，但没有一个有效，最后我尝试了这个，但仍然面临同样的问题。
下面是我的代码：
HTML
<!DOCTYPE html>
<html >
<head>
<title>ControlHome</title>
<meta charset="utf-8">
<link rel="stylesheet" href="../css/style.css">
<link rel="stylesheet" href="css/admin.css">
<script src="../js/jquery-1.7.1.min.js"></script>
<script src="../js/superfish.js"></script>
<script src="../js/jquery.easing.1.3.js"></script>
<script src="../js/tms-0.4.1.js"></script>
<script src="../js/slider.js"></script>
<!--[if lt IE 8]>
<div style=' clear: both; text-align:center; position: relative;'>
<a href="http://windows.microsoft.com/en-US/internet-explorer/products/ie/home?ocid=ie6_countdown_bannercode">
<img src="http://storage.ie6countdown.com/assets/100/images/banners/warning_bar_0000_us.jpg" border="0" height="42" width="820" alt="You are using an outdated browser. For a faster, safer browsing experience, upgrade for free today." />
</a>
</div>
<![endif]-->
<!--[if lt IE 9]>
<script src="../js/html5.js"></script>
<link rel="stylesheet" href="css/ie.css">
<![endif]-->
</head>
<body>
<div class="main-bg">
<div class="page">
<form method="GET" action="uploader.php" enctype="multipart/form-data>
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td>
<form enctype="multipart/form-data" action="uploader.php" method="POST">
<!-- MAX_FILE_SIZE must precede the file input field -->
Choose a file to upload: <input name="uploadedfile" type="file" /><br />
<input type="submit" value="Upload File" />
</td>
<td> </td>
<td> </td>
<td> </td>
</tr>
</table>
</form>
</div>
</div>
</div>
</div>
</section>
<!-- Footer -->
<footer>
</footer>
</div>
</body>
</html>
PHP
<?php
ini_set('upload_max_filesize', '1028M');
ini_set('post_max_size', '1028M');
echo $_FILES['uploadedfile']['error'];
print_r($_FILES);
//**********************************************************************************************
echo "Please wait while we attempt to upload your file...<br><br>";
//**********************************************************************************************
$target_path = "uploads/";
$flag = 0; // Safety net, if this gets to 1 at any point in the process, we don't upload.
$filename = $_FILES['uploadedfile']['name'];
$filesize = $_FILES['uploadedfile']['size'];
$mimetype = $_FILES['uploadedfile']['type'];
$filename = htmlentities($filename);
$filesize = htmlentities($filesize);
$mimetype = htmlentities($mimetype);
$target_path = $target_path . basename( $filename );
if($filename != ""){
echo "Beginning upload process for file named: ".$filename."<br>";
echo "Filesize: ".$filesize."<br>";
echo "Type: ".$mimetype."<br><br>";
}
//First generate a MD5 hash of what the new file name will be
//Force a MP3 extention on the file we are uploading
$hashedfilename = md5($filename);
$hashedfilename = $hashedfilename.".mp3";
//Check for empty file
if($filename == ""){
$error = "No File Exists!";
$flag = $flag + 1;
}
//Now we check that the file doesn't already exist.
$existname = "uploads/".$hashedfilename;
if(file_exists($existname)){
if($flag == 0){
$error = "Your file already exists on the server!
Please choose another file to upload or rename the file on your
computer and try uploading it again!";
}
$flag = $flag + 1;
}
//Whitelisted files - Only allow files with MP3 extention onto server...
$whitelist = array(".mp3");
foreach ($whitelist as $ending) {
if(substr($filename, -(strlen($ending))) != $ending) {
$error = "The file type or extention you are trying to upload is not allowed!
You can only upload MP3 files to the server!";
$flag++;
}
}
//Now we check the filesize. If it is too big or too small then we reject it
//MP3 files should be at least 1MB and no more than 6.5 MB
if($filesize > 6920600){
//File is too large
if($flag == 0){
$error = "The file you are trying to upload is too large!
Your file can be up to 6.5 MB in size only.
Please upload a smaller MP3 file or encode your file with a lower bitrate.";
}
$flag = $flag + 1;
}
if($filesize < 1048600){
//File is too small
if($flag == 0){
$error = "The file you are trying to upload is too small!
Your file has been marked as suspicious because our system has
determined that it is too small to be a valid MP3 file.
Valid MP3 files must be bigger than 1 MB and smaller than 6.5 MB.";
}
$flag = $flag + 1;
}
//Check the mimetype of the file
if($mimetype != "audio/x-mp3" and $mimetype != "audio/mpeg"){
if($flag == 0){
$error = "The file you are trying to upload does not contain expected data.
Are you sure that the file is an MP3?";
}
$flag = $flag + 1;
}
//Check that the file really is an MP3 file by reading the first few characters of the file
$f = @fopen($_FILES['uploadedfile']['tmp_name'],'r');
$s = @fread($f,3);
@fclose($f);
if($s != "ID3"){
if($flag == 0){
$error = "The file you are attempting to upload does not appear to be a valid MP3 file.";
}
$flag++;
}
//All checks are done, actually move the file...
if($flag == 0){
if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
//Change the filename to MD5 hash and FORCE a MP3 extention.
if(@file_exists("uploads/".$filename)){
//Rename the file to an MD5 version
rename("uploads/".$filename, "uploads/".$hashedfilename);
echo "The file ". basename( $filename ). "
has been uploaded. Your file is <a href='uploads/$hashedfilename'>here</a>.";
}
else{
echo "There was an error uploading the file, please try again!";
}
} else{
echo "There was an error uploading the file, please try again!";
}
}
else {
echo "File Upload Failed!<br>";
if($error != ""){
echo $error;
}
}
?>