[英]Upload file and rename before saving
我從w3school獲得了這段代碼,將文件上傳到服務器,如何將文件名更改為隨機數,以免出現重復問題。 有人可以幫我顯示上傳文件的正確和最安全的方法。
// Change folder permission so that files can be uploaded
chmod('_data/cvs/', 0777);
// Upload File to Server
$target_dir = "_data/cvs/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
// Check if image file is a actual image or fake image
if(isset($_POST["submit"])) {
$check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
if($check !== false) {
echo "File is an image - " . $check["mime"] . ".";
$uploadOk = 1;
} else {
echo "File is not an image.";
$uploadOk = 0;
}
}
// Check if file already exists
if (file_exists($target_file)) {
echo "Sorry, file already exists.";
$uploadOk = 0;
}
// Check file size
if ($_FILES["fileToUpload"]["size"] > 500000) {
echo "Sorry, your file is too large.";
$uploadOk = 0;
}
// Allow certain file formats
if($imageFileType != "doc" && $imageFileType != "docs" && $imageFileType != "pdf"
&& $imageFileType != "gif" ) {
echo "Sorry, only Doc, Docs and PDF files are allowed.";
$uploadOk = 0;
}
// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
echo "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
} else {
if (
move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
} else {
echo "Sorry, there was an error uploading your file.";
}
}
// Change folder permission so that nothing can be uploaded
chmod('_data/cvs/', 0644);
提前致謝!
我通常要做的是使用time()
函數。
我將更改這部分代碼:
$target_file = $target_dir .time(). basename($_FILES["fileToUpload"]["name"]);
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