acf-gravity-forms-v5.php

<?php

class acf_field_gravity_forms extends acf_field {

  function __construct() {
    $this->name = 'gravity_forms_field';
    $this->label = __( 'Gravity Forms', 'acf' );
    $this->category = __( "Relational", 'acf');
    $this->defaults = array(
      'multiple' => 0,
      'allow_null' => 0
    );

    parent::__construct();
  }

  function render_field( $field ) {
    $field = array_merge($this->defaults, $field);
    $choices = array();
    
    if ( class_exists( 'RGFormsModel' ) ){
      $forms = RGFormsModel::get_forms( null, 'title' );
    } else {
      return false;
    }

    if($forms) {
      foreach( $forms as $form ) {
        $choices[ $form->id ] = ucfirst($form->title);
      }
    }

    // override field settings and render
    $field['choices'] = $choices;
    $field['type'] = 'select';
    ?>
      <select name="<?php echo acf_esc_attr( $field['name'] ); ?>" id="<?php echo $field['name'];?>">
        <?php
          foreach ( $field['choices'] as $key => $value ):
            $selected = '';
            if ( $field['value'] == $key )
              $selected = ' selected="selected"';
            ?>
            <option value="<?php echo $key; ?>"<?php echo $selected;?>><?php echo $value; ?></option>
          <?php endforeach;
        ?>
      </select>
    <?php
  }
}

new acf_field_gravity_forms();

acf-sidebar-selector-v5.php

<?php

class acf_field_sidebar_selector extends acf_field {

  function __construct() {
    $this->name = 'sidebar_selector';
    $this->label = __( 'Sidebar Selector', 'acf' );
    $this->category = __( "Choice", 'acf' );
    $this->defaults = array(
      'allow_null' => '1',
      'default_value' => ''
    );

    parent::__construct();
  }

  function render_field_settings( $field ) {
    acf_render_field_setting( $field, array(
      'label'     => __( 'Allow Null?', 'acf-sidebar_selector' ),
      'type'      => 'radio',
      'name'      => 'allow_null',
      'layout'  =>  'horizontal',
      'choices' =>  array(
        '1' => __( 'Yes', 'acf' ),
        '0' => __( 'No', 'acf' ),
      )
    ));

    acf_render_field_setting( $field, array(
      'label'     => __( 'Default Value', 'acf-sidebar_selector' ),
      'type'      => 'text',
      'name'      => 'default_value',
    ));
  }

  function render_field( $field ) {
    global $wp_registered_sidebars;
    ?>
    <div>
      <select name='<?php echo $field['name'] ?>'>
        <?php if ( !empty( $field['allow_null'] ) ) : ?>
          <option value=''><?php _e( 'Select a Sidebar', 'acf' ) ?></option>
        <?php endif ?>
        <?php
          foreach( $wp_registered_sidebars as $sidebar ) :
          $selected = ( ( $field['value'] == $sidebar['id'] ) || ( empty( $field['value'] ) && $sidebar['id'] == $field['default_value'] ) ) ? 'selected="selected"' : '';
        ?>
          <option <?php echo $selected ?> value='<?php echo $sidebar['id'] ?>'><?php echo $sidebar['name'] ?></option>
        <?php endforeach; ?>

      </select>
    </div>

    <?php
  }
}

new acf_field_sidebar_selector();