$temp = “This blog is really lame, and I mean lame!â€;
$temp = preg_replace('/(\W){1,}/','-',$temp);
$temp = preg_replace('/-$/','',$temp);
echo $temp;
Here is the regular expression breakdown:
'/
(\W) //match any non-word character
{1,} //match it one or more times (greedy matching)
/'
The second regular expression takes care of the trailing dash at the end that results when the string has spaces or non-word characters like exclamation points at the end. I think you could use a lookahead in the first reg exp to detect the end of the word and then not add a dash, but that is above my head.