Quiz Field Change

gistfile1.php

<?php 
add_filter( "gform_field_choices", "custom_gravity_add_media_credit", 10,  2 );
function custom_gravity_add_media_credit( $choices, $field ) {

  // If field isn't quiz or radio, and isn't admin
  if ( ( $field["type"] != "radio" && $field["type"] != "quiz" ) || is_admin() ) {
      return $choices;
  }
  // If isn't an image layout
  if ( $field["answerLayoutField"] == "list" || !$field["answerLayoutField"] ) {
      return $choices;
  }

  // get current form ID #
  $current_form = $field["formId"];
  // get current page
  $current_page = GFFormDisplay::get_current_page($current_form);
  
  /* if this field is not on current page do not reformat 
  prevents us from losing correct/incorrect quiz choices on answer calculation */
  if ( $field["pageNumber"] !=  $current_page ) {
      return $choices;
  }

  $choices = "";
  if ( is_array( $field["choices"] ) ) {
    $choice_id = 0;
    $count = 1;
    $logic_event = !empty($field["conditionalLogicFields"]) ? "onclick='gf_apply_rules(" . $field["formId"] . "," . GFCommon::json_encode($field["conditionalLogicFields"]) . ");'" : "";

    foreach( $field["choices"] as $choice ) {
      // Grab image ID from img tag
      $image_id = explode('data-id="',$choice["text"]);
      $image_id = explode('">', $image_id[1]);

      // Get media credit
      $media_credit = the_media_credit_html( $image_id[0] );

      $updated_choice = $choice["text"];
      if ( $field["answerLayoutField"] == "grid-2" ) {
          $new_image = wp_get_attachment_image_src( $image_id[0], '637-320' );
      } else if ( $field["answerLayoutField"] == "grid-4" ) {
          $new_image = wp_get_attachment_image_src( $image_id[0], 'thumbnail' );
      } else {
          $new_image = wp_get_attachment_image_src( $image_id[0], '637-320' );
      } 
      // Replace img tag w/ resized image
      $updated_choice = preg_replace("/src=\"(\S)*\"/", "src=\"$new_image[0]\"/", $updated_choice);

      // Wrap image in <div> and add media credit
      $updated_choice = preg_replace( '/(<img([^>]*)>)/i', '<div class="thumb">$1 ' . $media_credit . '</div>', $updated_choice );
     
      $id = $field["id"] . '_' . $choice_id++;
      $field_value = !empty($choice["value"]) || rgar($field, "enableChoiceValue") ? $choice["value"] : $choice["text"];
      $checked = rgar($choice,"isSelected") ? "checked='checked'" : "";
      $tabindex = GFCommon::get_tabindex();

      $input = sprintf("<input name='input_%d' type='radio' value='%s' %s id='choice_%s' $tabindex $logic_event />", $field["id"], esc_attr($field_value), $checked, $id);
      $choices .= sprintf("<li class='gchoice_$id gchoice_img'>%s <div><label for='choice_%s' id='label_%s'>%s </label></div></li>", $input, $id, $id, $updated_choice);

      $count++;
    }
  }

  return $choices;
}