sanitize_file_name()

sanitize_file_name() — Sanitizes a filename, replacing whitespace with dashes. Removes special characters that are illegal in filenames on certain operating systems and special characters requiring special escaping to manipulate at the command line. Replaces spaces and consecutive dashes with a single dash. Trims period, dash and underscore from beginning and end of filename. It is not guaranteed that this function will return a filename that is allowed to be uploaded.

Inputs: $filename (string): The filename to be sanitized.

Returns string: The sanitized filename.