I currently have a really great `preg_replace` system going on for my seo needs, but I'm having trouble with one character specifically and that's the $. The code I have returns the $ as a blank but I would prefer it if it turned the $ to the letter S. It's probably just a minor tweak but I'm sure how to single it out.

```
    $urlname = preg_replace("/[^a-zA-Z0-9\/_|+ -]/", '', $info['name']);
    $urlname = strtolower(trim($urlname, '-'));
    $urlname = preg_replace("/[\/_|+ -]+/", '-', $urlname);  
    $seourl = strtolower($urlname);

```