regular expression for converting underscores to dash in php

Question

I am trying to convert an underscore to dash in php.

hi i have a regular expression that converts white spaces to dash but how can i achieve underscore to dash?

 $item = preg_replace('/\ +/', '-', $item);

Answer 1

preg_replace('/_/', '-', $item);

Answer 2

You don't need a regular expression. Use str_replace:

$item = str_replace('_', '-', $item);

Answer 3

You can convert both space and underscore to dash with one regex:

$item = preg_replace('/[ _]+/', '-', $item);