making a php function that If mysql returns 0 rows, return false

Question

Im trying to get the function below to return TRUE if it finds a matching row, and FALSE if it finds 0 rows.

function IsOpenEvent($id) {
    $result = mysql_query("SELECT * FROM `events`
                             WHERE `access` = 'public'
                               AND `id` = '$id'
                             LIMIT 1")
                or die(mysql_error());
    if ($result) {
        return TRUE;
    } else {
        return FALSE;
    }
}

Answer 1

return mysql_num_rows($result) != 0;

Answer 2

if (mysql_num_rows($result) == 0)
    return false
else 
    return true

Answer 3

return (bool) mysql_num_rows($result)

Answer 4

just to let you know, you should really be calling mysql_real_escape_string() on $id, otherwise you're leaving an SQL injection vulnerability in your code.