如果我想在文件名转到服务器的永久位置(而不是临时位置)之前更改文件名,我该如何执行此操作。
代码如下:
<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>
<?php
if ((($_FILES["file"]["type"] == "image/gif")
|| ($_FILES["file"]["type"] == "image/jpeg")
|| ($_FILES["file"]["type"] == "image/pjpeg"))
&& ($_FILES["file"]["size"] < 20000))
{
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";
}
?>
我不确定我是否明白你的意思。如果您只想在将文件存储在“upload”目录中时重命名该文件,请在使用时这样做move_uploaded_file()
:
$destination = "upload/" . $new_filename;
if (file_exists($destination)) {
echo 'File ', $destination, ' already exists!';
} else {
move_uploaded_file($temp_filename, $destination);
}
您还可以让用户定义$new_filename
通过在 HTML 表单中提供额外的“重命名”文本字段。
EDIT: 代码可能是这样的:
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 />
<!-- NEW TEXTBOX -->
<label for="newname">Rename to (optional):</label>
<input type="text" name="newname" id="newname" />
<br />
<input type="submit" name="submit" value="Submit" />
</form>
PHP:
$upload_dir = realpath('upload') . DIRECTORY_SEPARATOR;
$file_info = $_FILES['file'];
// Check if the user requested to rename the uploaded file
if (!empty($_POST['newname'])) {
$new_filename = $_POST['newname'];
} else {
$new_filename = $file_info['name'];
}
// Make sure that the file name is valid.
if (strpos($new_filename, '/') !== false || strpos($new_filename, '\\') !== false) {
// We *have* to make sure that the user cannot save the file outside
// of $upload_dir, so we don't allow slashes.
// ATTENTION: You should do more serious checks here!
die("Invalid filename");
}
$destination = $upload_dir . $new_filename;
// ... if (file_exists(... move_uploaded_file(...
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