How do I get PHP to save a backslash in a Mysql table?

["Don Proshetsky" <don@xxxxxxxxxxxxx>]

Hi,

I have a field in which a user inputs a Windows style directory path, hence 
using backslashes and not forward slashes.

Example: c:\qb\data\mydatadile.qbw

However, when the use clicks update, what gets saved is: 
c:qbdatamydatadile.qbw

Does anyone know if there is a work around?

The backslashes mysteriously are stripped.  I use the following function to 
wrap each variable that's saved in the MySQL table:

function update_database($value)
{
   // Addslashes
   if (!(get_magic_quotes_gpc())) {
       $value = addslashes($value);
   }
   // Quote if not a number or a numeric string
   if (!is_numeric($value)) {
       $value = mysql_real_escape_string($value);
   }
   return $value;
}