Help with regular expression

[Anon]

I need to create a regular expression that replaces more than one space character with just one.

It is for a username registration page and I want to ensure that a user can not type more than one space character in a row.

My grasp on regular expressions is pretty small so any help would be very welcome.

Ben.

[Anon]

You could do this:
$new_username = ereg_replace("[^ ]*", " ", $username);

It's probably not the fastest way but it should work.

-jmk

[sjokki]

The regular expression of jmk returns a string with only spaces.

The following returns a string with all occurences of one or more spaces (or tabs or newlines) replaced with one space:

$new_username = preg_replace('/\s+/', ' ', $username);