I'm having an issue with users uploading files with a Semi Colon in the file name.
I am currently using a script that replaces characters within the file name, however, when I try to add a ";" as invalid characters to replace, it is like the semi-colon just stops the script, as the file does not upload (no errors are displayed).

Here's the code I'm working with:

PHP Code:

$valid_chars_regex = '.A-Z0-9_ !@#$%^&()+={}\[\],~`-';    
$file_name = preg_replace('/[^'.$valid_chars_regex.']|\'.+$/i', "", basename($_FILES[$upload_name]['name']));
    if (strlen($file_name) == 0 || strlen($file_name) > $MAX_FILENAME_LENGTH) {
        HandleError("Invalid file name");
        exit(0);
    } 


I tried placing the semi colon all over the place in the preg_replace function, but nothing seems to work.

How can I do this?

Have you tried escaping ';' with '\'?

Also, you can try preg_quote.

I have one nifty function which will replace all the special chars. See whether that helps you or not.

PHP Code:

function makeslug($str,$separator='-')
{
    $str = strtolower(trim($str));
    $str = preg_replace('/[^a-z0-9-]/', $separator, $str);
    $str = str_replace(' ',$separator, $str); // replace spaces by $separator
    $str = preg_replace('/-+/', $separator, $str); //replace multiple dashes by underscore
    $str = preg_replace('/_+/', $separator, $str); //replace multiple underscore by single underscore
    $str = trim($str,$separator); //remove trailing underscores, if any
    return $str;
}