php ajax html dynamic record handling

I have an html form.
I have the following php script.
 
The  saveVisit function below is one record.
I could have 1 or up to 6 records.

I am executing php with ajax.
How do I create the html form fields to allow for easy handling of dynamic records?
Also the same applies for my php to allow for dynamically handling record in server.

        function processEachVisit(){
            //loop through each visit

            //execute saveVisit query

        };



        //function to save each visit.
        function saveVisit($dbconn, $providerID, $clientId, $visitStart, $visitEnd, $visitUnits, $visitMinutes, $visitActvities, $visitComments){
            $Query = 'INSERT INTO serviceRendered (clientId, visitStart, visitEnd) VALUES
                      ( $1, $2, $3 ) RETURNING id';

            $result = pg_query_params($dbconn, $Query, array(clientId, visitStart, visitEnd));

            $row = pg_fetch_row($result);

            return $row['0'];

        }

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