[PHP] mysql question

[nihilism machine]

i have this functuon:
        
public function select_one($sql) {
                $this->last_query = $sql;
                $r = mysql_query($sql);
                if (!$r) {
                        $this->last_error = mysql_error();
                        return false;
                }
                if (mysql_num_rows($r) != 1) {
                        return false;   
                }
                $ret = mysql_result($r, 0);
                mysql_free_result($r);
                if ($this->auto_slashes) return stripslashes($ret);
                else return $ret;
        }

what is $ret, an array? if so how can i access the individual rows in  
it?

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