workaround possible searchwp + ACF conflict on 'restrict_manage_posts' filter hook

searchwp_acf_test.php

add_action('init', function() { // workaround to get correct field_object for regions filter, if searchwp admin search is enabled
  
  $regions_field = get_field_object('field_552bd08a5e8bf', false, array('load_value' => false));

  // add filter by region for member data
  add_action( 'restrict_manage_posts', function () use($regions_field) {
    global $pagenow, $current_screen, $typenow;

    if ( $pagenow != 'edit.php' OR $current_screen->post_type != 'mitglieder' OR $typenow != 'mitglieder' )
      return;
    
    // ideally, get field_object_value here...
    //if( !$regions_field )
      //$regions_field = get_field_object('mitglied_region', false, array('load_value' => false));

    if( !$regions_field OR !isset($regions_field['choices']) ) return;

    echo '<select name="region_filter">';
    echo '<option value="">Alle Regionen</option>';

    foreach ( $regions_field['choices'] as $val => $text ) {
      $sel = '';
      if ( isset( $_GET['region_filter'] ) && $_GET['region_filter'] == $val )
        $sel = 'selected ';
      echo '<option ' . $sel . 'value="' . $val . '">' . $text . '</option>';
    }
    echo '</select>';

  });

});