SELECT * FROM modx_web_groups g LEFT OUTER JOIN modx_web_users u ON g.webuser = u.id WHERE g.webgroup = 1
mysql_connect("localhost", "user", "pass") or die(mysql_error());
mysql_select_db("db") or die(mysql_error());
$result = mysql_query("SELECT * FROM modx_web_groups g LEFT OUTER JOIN modx_web_users u ON g.webuser = u.id WHERE g.webgroup = '1'");
while($row = mysql_fetch_array($result)) {...