I have two elements in my form: a select and a table element. Everytime onchange event is triggered on select element, I want to update the values in my table. I want to do query and change the values of ‘#rows’ in the table.

function myid_print_user_page_form($form, &$form_state) {     $form = array();     $form['myid_print']['option'] = array(         '#type' => 'select',                 '#options' => array(             0 => t('All'),             1 => t("Printed ID's"),             2 => t("Unprinted ID's"),         ),         '#default_value' => 0,                      '#ajax' => array(             'callback' => 'myid_print_all_submitted_id_callback',             'wrapper' => 'myid_table_wrapper',         ),                                  );      // Build the sortable table header.     $header = array(         'id_number' => array('data' => t('ID Number'), 'field' => 'id_number','sort' => 'asc'),              'student' => array('data' => t('Student'), 'field' => 'student', 'sort' => 'asc')     );      //Get the node data.       $query = db_select('student', 't1',array('target' => 'import'));     $result = $query         ->fields('t1', array('studid','lastname', 'firstname', 'middlename', 'extname'))            ->condition('t1.id_status',1,'=')         ->distinct()         ->execute();      //Build the rows.     $rows = array();       foreach($result as $record){         $rows[$record->studid] = array(             'id_number' => $record->studid,             'student' => $record->firstname . ' ' . $record->middlename . ' ' . $record->lastname . ' ' . $record->extname,             );     }      //Build the table      $form['table'] = array(         '#theme' => 'table',         '#header' => $header,         '#rows' => $rows,         '#prefix' => '<div id="myid_table_wrapper">',         '#suffix' => '</div>',     );     return $form; }    

I’m stuck here, I don’t know what to put in my callback function.

function myid_print_all_submitted_id_callback($form, $form_state) {     //Do query here and put the query results in the table. } 

Any help would be very much appreciated.