如何在上传文件之前或之后重命名文件？我只想重命名文件名，而不是扩展名。
$changeTXT = $_SESSION['username'];
$uploaderName = strtolower($changeTXT);
$changeTXT = strtolower($changeTXT);
$changeTXT = ucfirst($changeTXT);
$filelocation = $_POST['userfile'];
$filename = $_POST['filename'];
$max_size = $_POST['MAX_FILE_SIZE'];
$file = $_FILES['userfile'];
$allowedExtensions = array("wma", "mp3", "wav");
function isAllowedExtension($fileName) {
global $allowedExtensions;
return in_array(end(explode(".", $fileName)), $allowedExtensions);
}
if($file['error'] == UPLOAD_ERR_OK) {
if(isAllowedExtension($file['name'])) {
$uploaddir = "uploads/".$uploaderName."/";
$uploadfile = $uploaddir . basename($_FILES['userfile']['name']);
if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
echo "Thank you for uploading your music!<br /><br />";
} else {
echo "Your file did not upload.<br /><br />";
}
echo "\n";
echo "<a href='index.php'>Return</a> to index.<br /><br />$uploaddir";
} else {
echo "You have tried to upload an invalid file type.<br /><br />";
}
} else die("Cannot upload");
答案 0 :(得分：22)
使用move_uploaded_file时，您可以选择文件名，这样您就可以选择任何想要的内容。
当您上传文件时，它会被放入一个带有临时名称的临时目录，move_uploaded_file()允许您移动该文件，并且您还需要设置该文件的名称。
答案 1 :(得分：6)
我建议您查看Verot的文件上传类。它可以治愈很多通过php上传文件的痛苦，并使你的代码更具可读性/可维护性。
以下是link to the class和文档。
关于你问题的确切答案： 要为上载的文件指定新名称，请将其作为move_uploaded_file（）函数的第二个参数。
由于您要保留扩展名，请先将其存储在变量中：
$ext = explode('.',$_FILES['uploaded']['name']);
$extension = $ext[1];
您可以使用文件根名称生成新名称（此处附加时间戳）：
$newname = $ext[0].'_'.time();
假设您上传了一个文件，并且您的表单输入变量名称为“myfile.png”，它将变为“myfile_2343544.png”;
现在，结合目标目录的本地路径，$ newname var和文件的扩展名来设置函数的第二个参数：
$full_local_path = 'path/to/your/filefolder/'.$newname.'.'.$extension ;
move_uploaded_file($_FILES['uploaded']['tmp_name'], $full_local_path);
答案 2 :(得分：3)
为什么不用其他名称保存：
只需更改$ uploadfile变量的名称：
$uploadfile = $uploaddir . "somefilename" . end(explode(".", $file['name']));
如果你稍微重构一下代码，那就不会有什么坏处。
答案 3 :(得分：1)
当你这样做时
$uploadfile = $uploaddir . basename($_FILES['userfile']['name']);
if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
只需将$ upload文件设置为所需文件名的整个路径;即“uploads / newfilename.jpg”
答案 4 :(得分：1)
您可以使用move_uploaded_file中的第二个参数来设置文件名。第一个参数是/ tmp文件夹中文件的文件名，第二个参数是文件目录和新文件名。
move_uploaded_file($_FILES['file']['tmp_name'], "/new/file/dir/".[the new file name]);
我知道这是一个老问题，但没有一个明确的答案。
答案 5 :(得分：0)
<?php
/*
Just change the $path variable to your uploads path
and dont forget the / at the end of the path.
The way this function works is .When the user submits the form
the uniqueFilename() function checks to see if there is a filename
in your uploads folder, that has the same name as the one you intend
to upload. If it finds a filename that has the same name as the one you want to
upload it goes through the next steps
Step 1
strrpos($arg1,$arg2) - we use it to find the location where upload path ends and where the filename begins
$arg1 = the filepath including the filename ex. uploads/myFile.jpg
$arg2 = basename($filename); what this does is it strips the path from the string and returns only the filename.
When we use strrpos($arg1,$arg2) we basically tell the function to find the position of the path and exclude the filename
Step 2
substr($arg1,$arg2,$arg3) - looks in a string and extrats only the parts from the string that you want. We use it now to extract the uploads path.
$arg1 = the full path of the uploaded file. ex. uploads/myFile.jpg
$arg2 = 0 because we want to start from the begginning of the string
$arg3 = $pathlocation which is the location of where the uploadpath ends and the file beggins
when we use substr() here we intend to extract the uploads path.
Step 3
basename($arg1) strips out a path and returns the filename
- we use this to save the original filename
Notice that so far we have the path to the files saved and also
the filename with its extension. We also have the file extension (.jpg|.png) or whatever
Step 4
pathinfo() - extracts the extension from the filename
Step 5
we us strrpos() to find the location of the last dot ( . ) in the filename because in step 6
we use this location to cut the string where the dot ( . ) is
Step 6
substr() gets the file without the extension
Step 7
substr() takes the filename without extension and clips out the last charcter
so if the filename is myFile this function would return myFil
Step 8
substr() again we use it to save the last character of the file so
if our file is called myFile it would return e.
Step 9
Here we check to see if the last character of our file is numeric.
Why do this? Because if the last character of a file is numeric we can just add a number to the
file and end up with a new file with an added number so our file is
myFile1 the 1 is numeric so our intention is to add to it
so my myFile1 would end up being myFile2. But what happens if our last character is not numeric?
then we just add -1 to the file so that myFile would end up being myFile-1
Step 10
Since our filename exists in the database we must call the function uniqueFilename() again so that we can
check and see if the new name exists in the database.
This function basically keeps calling itself until it finds a filename that does not exists.
*/
if(isset($_POST['submit'])){
$path = "uploads/";
$fullPath = $path.$_FILES['uploadFile']['name'];
$full_local_path = $path.uniqueFilename($fullPath) ;
move_uploaded_file($_FILES['uploadFile']['tmp_name'], $full_local_path);
}
/*
* Function returns a unique filename
* Param 1 is the path of the filename and the filename
* returns filename with no path
*/
function uniqueFilename($filepathAndFilename){
// check to see if file exists
if (file_exists($filepathAndFilename))
{
/* step 1 */
//Get the path location without the basename
$filePathWithoutFilenameLocationInString = strrpos($filepathAndFilename,basename($filepathAndFilename));
/* step 2 */
//Get the path and cut the basename
$path = substr($filepathAndFilename,0,$filePathWithoutFilenameLocationInString);
/* Step 3*/
//Get the base filename
$filename = basename($filepathAndFilename);
/* Step 4 */
// get the extension
$fileExtension = pathinfo($filename, PATHINFO_EXTENSION);
/* Step 5 */
// find the position of the last dot
$dotLocation = strrpos($filename,'.');
/* Step 6 */
// Get the filename without the dot
$fileWithNoExtension = substr($filename,0,$dotLocation);
/* Step 7 */
//Get the name without the last character
$filenameMinusLastCharacter = substr($fileWithNoExtension,0,-1);
/* Step 8 */
//save the last character
$lastFilenameCharacter = substr($fileWithNoExtension,-1);
/* Step 9*/
//if the last character is numeric add 1
if (is_numeric($lastFilenameCharacter))
{
$newFilename = $path.$filenameMinusLastCharacter.($lastFilenameCharacter+1).'.'.$fileExtension;
//recursively call itself
/* Step 10*/
$results = uniqueFilename($newFilename);
return basename($results);
}else{
// if the last character is not numeric then add 1
$newFilename = $path.$fileWithNoExtension.'-1'.'.'.$fileExtension;
/* Step 10*/
//recursively call itself
$results = uniqueFilename($newFilename);
return basename($results);
}
}
return basename($filepathAndFilename);
}
?>
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Untitled Document</title>
</head>
<body>
<form method="post" enctype="multipart/form-data"/>
<label>Upload File</label>
<input type="file" name="uploadFile"/>
<input type="submit" name="submit" value="submit"/>
</form>
</body>
</html>`enter code here`