How Can I Rename Uploaded Files Before Saving Them to a Directory?

Renaming Uploaded Files Prior to Directory Storage

Your code for uploading files to a directory is efficient. However, you seek to rename the uploaded file using a random number before saving it to the directory.

move_uploaded_file()'s Function

You correctly identified move_uploaded_file() as responsible for saving the uploaded file and potentially setting its name. This function accepts two parameters:

1. The temporary location of the uploaded file ($_FILES["file"]["tmp_name"])
2. The target destination, including the file's name in the directory ("../img/imageDirectory/" . $_FILES["file"]["name"])

Renaming the File

To rename the file to a random number, you can modify the second parameter as follows:

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

Here, round(microtime(true)) generates a random number based on the current time, which is then combined with the file's original extension (end($temp)).

Modified Code:

Replace this line in your code:

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

With:

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

This modification will rename the uploaded file to a random number while preserving the original file extension.

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