Copy paste that
PHP Code:
<?php
//try it with
$title=' I can replace several spaces ';
//you probably don't want to add a dash at the beginning or at the end of the $title if there is some space at the beginning or at the end
$title = trim($title);
// \s+ is the "pattern" you want to replace with dashes
$new_title = preg_replace('/\s+/','-',$title);
echo $new_title;
Have fun with title and dashes