Replace output from spaces to dashes

[paradoxos]

I have a database with names that often have spaces, for example:

First Company Name

I would like to replace these spaces with dashes so I can put them in the html:

www.example.com/First-Company-Name/

Anybody know how to do this?

[kvnband]

built in function str_replace

[us3.php.net...]

[prometeus]

$out = str_replace(" ", "/", $out);