Replace Multiple Backslash Character Using preg_replace() in PHP

It seems like an easy problem to solve, but It’s not as easy as it seems. Assuming I have this string in PHP: \\\super\\\\\\man\\\ and I would like to replace all the backslashes into space or other characters is not as easy as using str_replace() function. The number of backslashes may be 1 or more. But all consecutive need to be replace into ONE space.