PHP: How to sanitize uploaded filenames?

Question

I have a PHP application.

I allow users to upload files to my web application.

Question: What\'s the best way for me to sanitize the file n

Answer 1

Ciao, this function also removes all the points and then I create the clean string with the extension.

function sanitaze_upload_file($data)
{
    $imgName   = $data;
    $indexOFF  = strrpos($imgName, '.');
    $nameFile  = substr($imgName, 0,$indexOFF);
    $extension = substr($imgName, $indexOFF);
    $clean     = preg_replace("([^\w\s\d\-_~,;\[\]\(\)])", "", 
    $nameFile);
    $NAMEFILE  = str_replace(' ', '', $clean).$extension;
    return $NAMEFILE;
}