Help with arrays

[berbbrown]

I have a query:

$sqlquery = "SELECT userid FROM tblusers WHERE groupid = 1";

I want to create a string of user id's, like:

1, 4, 5, 6, 9

• from the records which are returned

Can anyone help?

Thanks

[Installer]

// If by "string" you mean "string",
// use the "$str =..." lines.
$str = '';
// If by "string" you mean "array",
// use the "$arr =..." lines.
$arr = array();
$result = mysql_query($sqlquery);
if (mysql_num_rows($result) == 0) {
    echo 'Query found nothing';
} else {
    while ($row = mysql_fetch_assoc($result)) {
        $str .= $row['userid'] . ', ';
        $arr[] = $row['userid'];
    }
   $str = trim(', ', $str);
}