Help with simple query

I need help with a simple query, brain is dead today and cant work it out.

Basically im querying the db for a list of usernames (which are email addresses)

I then need to get all the found udernames into a variable, which i can then add to my email 'To' variable

This doesnt work?

$result3 = @mysql_query($sql3,$connection) 
	or die(mysql_error());

while ($row = mysql_fetch_array($result3)) {  
$addresses= $row['username'];   
};  

PHP:

Any helpers?

 

$saveEmails = $saveEmails .= ';' . $list['username'];

or something!

 

$result3 = @mysql_query($sql3,$connection) 
    or die(mysql_error());
$addresses = '';
while ($row = mysql_fetch_array($result3)) {  
$addresses .=  $row['username'].';';   
}

PHP:

That should work