Continue from Insert, adding and else statement
else {
//update
$query = "UPDATE education SET Startyear ='$Startyearinput_esc', Endyear='$Endyearinput_esc', School='$Schoolinput_esc', Course='$Courseinput_esc', Qualification='$Qualificationinput_esc', member_Member_id='$memberId' WHERE Education_id='$Educationinput_esc'";
$queryResult = $db->writeQuery($query);
if (!empty($queryResult)){
//echo "Successfully updated new entries.";
$database_mod = TRUE;
$i++;
}