Affected rows VS Matched rows

[eluser]Alexxz[/eluser]
What do you think about that way of implementation from PHP.net web site?

Code:

function mysql_modified_rows () {
        $info_str = mysql_info();
        $a_rows = mysql_affected_rows();
        ereg("Rows matched: ([0-9]*)", $info_str, $r_matched);
        return ($a_rows < 1)?($r_matched[1]?$r_matched[1]:0):$a_rows;
        }