Seperating a string

[paul41598]

Hey guys, I need just a tad bit of assistance here. I basically have a text field where you enter usernames seperated by comma's (Joe, Jeff, Craig) Thats where I use the explode function. Then use a foreach loop to loop through the names. However if I echo the $list_usernames it spits out JoeJeffCraig in one line. I actually need each name to be sperated with a ; and I'm having a brain lapse on how to do this again

PHP Code:

             $list_usernames = explode(",",$vbulletin->options['list_usernames']);

foreach($list_usernames AS $list_username)
{
      need code here
}