We create 2 dummy fields that are not updatable to store the repeated fields.
When we save the registered values, we compare the $HTTP_POST_VARS values. If the
email and passwords to not match, we set $gBAD to true.
We can control which fields are saved into the database using the eventPreInsertField
property. Every field that is meant to be updated is passed to the function (CheckInsertField)
defined by this property.
CheckInsertField() returns -1 to skip processing of the dummy fields, 0 to stop the
Insert, and 1 to indicate continue processing normally. We use the $lens->Error() function
to pass an error message to the user.