How to Rename Uploaded Files Before Saving Using PHP?

File Renaming Before Saving into a Directory

The question revolves around renaming uploaded files before storing them in a specific directory. The code provided utilizes the move_uploaded_file() function to handle file saving and potentially name setting. The objective is to modify the file name using a random number.

The attempted modification, involving the use of $fileName and its subsequent manipulation, didn't lead to the desired renaming. Instead, the $fileName mechanism will not alter the file name used by move_uploaded_file().

To effectively rename the file with a random number, the following approach can be implemented:

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

This modified code introduces a new variable, $newfilename, which generates a unique file name using the current time as a basis. The file name is constructed by appending the extension of the original file, retrieved using end($temp). This $newfilename is then employed as the second parameter for move_uploaded_file(), ensuring that the file is stored with the desired random name.

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