PHP and mySQL, working with num_affected_rows - php

Question

Now, the program is working fine to an extent, in that when mysql_affected_rows is more than 0, it does indeed add the data to the new table and print out the relevant echo message.
However, when mysql_affected_rows = 0, I get nothing, no error message, but absolutely no output at all.
I've stripped the code back, do any of you have any idea, i've looked at brackets, and closing conditions etc and can't work out why!
Code
$query10 = ("SELECT p.surname, p.passNo, p.activeUntil FROM PASSENGER p WHERE p.activeUntil < DATE_ADD(NOW(),INTERVAL -1 DAY)");
$result = mysql_query($query10);
while($row = mysql_fetch_array($result))
{
$surname = $row['surname'];
$passNo = $row['passNo'];
mysql_query("INSERT INTO ARCHIVED_PASSENGER (surname, passNo) VALUES ('$surname', '$passNo') ")
or die(mysql_error());
if (mysql_affected_rows()>0) {
echo '<p>';
echo "The number of rows affected by this update is: ";
echo mysql_affected_rows();
}
if (mysql_affected_rows()<1) {
echo '<p>';
echo "No records were affected. Taking you back to the control panel.";
}
}

Answer 1

I would advice to add a if($result != false && mysql_num_rows($result) > 0) just before the while loop. Like so:
$query10 = ("SELECT p.surname, p.passNo, p.activeUntil FROM PASSENGER p WHERE p.activeUntil < DATE_ADD(NOW(),INTERVAL -1 DAY)");
$result = mysql_query($query10);
if($result != false && mysql_num_rows($result) > 0)
{
while($row = mysql_fetch_array($result))
{
$surname = $row['surname'];
$passNo = $row['passNo'];
$query11 = mysql_query("INSERT INTO ARCHIVED_PASSENGER (surname, passNo) VALUES ('$surname', '$passNo') ")
or die(mysql_error());
if ($query11 != false && mysql_affected_rows()>0) {
echo '<p>';
echo "The number of rows affected by this update is: ";
echo mysql_affected_rows();
echo '</p>';
}
if ($query11 == false || mysql_affected_rows()<1) {
echo '<p>';
echo "No records were affected. Taking you back to the control panel.";
echo '</p>';
}
} else {
//nothing was retrieved, give some error!
}
}