如何重命名上传的文件之前保存到一个目录？

下面是我用来将文件上传到目录中的代码。我的主要问题是:

Move _ load _ file () 是将上传的文件保存到目录中的文件，而且我猜测 Move _ download _ file ()是为其设置名称的文件。

如何将文件名更改为随机数？

我试图这样做:

$allowedExts = array("gif", "jpeg", "jpg", "png");
$temp = explode(".", $_FILES["file"]["name"]);
$extension = end($temp);
if ((($_FILES["file"]["type"] == "image/gif") || ($_FILES["file"]["type"] == "image/jpeg") || ($_FILES["file"]["type"] == "image/jpg") || ($_FILES["file"]["type"] == "image/pjpeg") || ($_FILES["file"]["type"] == "image/x-png") || ($_FILES["file"]["type"] == "image/png")) && ($_FILES["file"]["size"] < 100000) && in_array($extension, $allowedExts)) {
if ($_FILES["file"]["error"] > 0) {
echo "Return Code: " . $_FILES["file"]["error"] . "<br>";
} else {


$fileName = $temp[0] . "." . $temp[1];
$temp[0] = rand(0, 3000); //Set to random number
$fileName;


if (file_exists("../img/imageDirectory/" . $_FILES["file"]["name"])) {
echo $_FILES["file"]["name"] . " already exists. ";
} else {
move_uploaded_file($_FILES["file"]["tmp_name"], "../img/imageDirectory/" . $_FILES["file"]["name"]);
echo "Stored in: " . "../img/imageDirectory/" . $_FILES["file"]["name"];
}
}
} else {
echo "Invalid file";
}

我尝试更改变量，如 $_ FILES [“ file”][“ name”]，并用 $fileName;变量替换它，以便可以存储新名称。

320950

小开

最佳答案

You can simply change the name of the file by changing the name of the file in the second parameter of move_uploaded_file.

Instead of

move_uploaded_file($_FILES["file"]["tmp_name"], "../img/imageDirectory/" . $_FILES["file"]["name"]);

Use

$temp = explode(".", $_FILES["file"]["name"]);
$newfilename = round(microtime(true)) . '.' . end($temp);
move_uploaded_file($_FILES["file"]["tmp_name"], "../img/imageDirectory/" . $newfilename);

Changed to reflect your question, will product a random number based on the current time and append the extension from the originally uploaded file.

小开

You guess correctly. Read the manual page for move_uploaded_file. Set the second parameter to whereever your want to save the file.

If it doesn't work, there is something wrong with your $fileName. Please post your most recent code.

小开

You can Try this,

$newfilename= date('dmYHis').str_replace(" ", "", basename($_FILES["file"]["name"]));


move_uploaded_file($_FILES["file"]["tmp_name"], "../img/imageDirectory/" . $newfilename);

小开

The move_uploaded_file will return false if the file was not successfully moved you can put something into your code to alert you in a log if that happens, that should help you figure out why your having trouble renaming the file

小开

/* create new name file */
$filename   = uniqid() . "-" . time(); // 5dab1961e93a7-1571494241
$extension  = pathinfo( $_FILES["file"]["name"], PATHINFO_EXTENSION ); // jpg
$basename   = $filename . "." . $extension; // 5dab1961e93a7_1571494241.jpg


$source       = $_FILES["file"]["tmp_name"];
$destination  = "../img/imageDirectory/{$basename}";


/* move the file */
move_uploaded_file( $source, $destination );


echo "Stored in: {$destination}";