As the question says, im not clear on how to go about adding new input fields depending on values of certain fields in the form.

I got as far as setting a callback and a wrapper, but i just can’t seem to rebuild the form, i can do basic returns of values from the callback, but that’s about it.

If anyone could show me a clean, simple way where i could go from, that would be great!

<?php  //Create raffle form function raffle_create_form($form, &$form_state) {      //Basic raffle info     $form['raf_raffle_name'] = array(         '#type' => "textfield",         "#prefix" => "<h5>Raffle information</h5><hr>",         "#title" => "Raffle Name:",         "#required" => TRUE     );      $form['raf_allowed_number'] = array(         '#type' => "textfield",         "#title" => "Number of allowed members",         "#required" => TRUE,         '#element_validate' => array('element_validate_number')     );      $form['raf_start_now'] = array(         "#type" => "checkbox",         "#title" => "Start raffle now?"     );      $form['raf_end_date'] = array(         "#type" => "date",         "#title" => "When to close this raffle?",         "#required" => TRUE     );      $form['raf_prize_type'] = array(         '#type' => "select",         "#options" => array('gift' => 'Steam Gift', 'hardware' => 'Gaming peripherals'),         "#title" => "Prize type",         "#ajax" => array(             'callback' => 'raffle_create_form_type_steam',             'wrapper' => 'steam_options',         ),     );       if(isset($form_state['values']['raf_prize_type']))     {         $form['raf_steam_options'] = array(             '#type' => 'textfield',             '#title' => 'Added div',             '#prefix' => '<div id="steam_options">',             '#suffix' => '</div>'         );         $form['raf_steam_options']['#description'] = 'configure some steamy steam steam';     }      $form['raf_prize_name'] = array(         '#type' => "textfield",         "#title" => "Prize name",         '#prefix' => '<div id="steam options"></div>',     );      $form['raf_prize_about'] = array(         '#type' => "textarea",         "#resizeable" => true,         "#title" => "Prize description"     );      $form['raf_prize_thumb'] = array(         '#type' => "file",         "#title" => "Prize thumbnail"     );      $form['raf_prize_link'] = array(         '#type' => 'textfield',         '#title' => "Link to product"     );      $form['raf_raffle_create'] = array(         '#type' => 'submit',         '#value' => "Create Raffle",     );      $form['#submit'][] = 'raffle_create_form_submit';      return $form; }  function raffle_create_form_validate($form, &$form_state) {  }  function raffle_create_form_submit($form, &$form_state) {     dsm('i printed'); }  function raffle_create_form_type_steam($form, &$form_state) {     dms('hi');     return $form['raf_steam_options']; }