You may occasionally need to exclude certain choices from a facet, or perhaps even include only certain choices. We’ll cover both approaches below.

Exclude certain choices

To exclude certain choices, add the following code to your (child) theme’s functions.php, and re-index afterward.

How to use custom PHP code?
PHP code can be added to your (child) theme's functions.php file. Alternatively, you can use the Custom Hooks add-on, or a code snippets plugin. More info
add_filter( 'facetwp_index_row', function( $params, $class ) {
  if ( 'my_facet_name' == $params['facet_name'] ) { // Replace 'my_facet_name' with the name of your facet
    $excluded_terms = [ 'Featured', 'Reviews' ]; // Replace with the display value (not the slug) of your excluded terms
    if ( in_array( $params['facet_display_value'], $excluded_terms ) ) {
      $params['facet_value'] = '';
    }
  }
  return $params;
}, 10, 2 );

Setting $params['facet_value'] to an empty string prevents FacetWP from indexing the current value. You could also replace facet_display_value with facet_value to target the raw value.

Include only certain choices

To include certain choices, add the following code to your (child) theme’s functions.php, and re-index afterward.

How to use custom PHP code?
PHP code can be added to your (child) theme's functions.php file. Alternatively, you can use the Custom Hooks add-on, or a code snippets plugin. More info
add_filter( 'facetwp_index_row', function( $params, $class ) {
  if ( 'my_facet_name' == $params['facet_name'] ) { // Replace 'my_facet_name' with the name of your facet
    $excluded_terms = [ 'Featured', 'Reviews' ]; // Replace with the display value (not the slug) of your excluded terms
    if ( ! in_array( $params['facet_display_value'], $included_terms ) ) {
      $params['facet_value'] = '';
    }
  }
  return $params;
}, 10, 2 );

Combine multiple rules

To apply rules to multiple facets, just use additional if statements.

How to use custom PHP code?
PHP code can be added to your (child) theme's functions.php file. Alternatively, you can use the Custom Hooks add-on, or a code snippets plugin. More info
add_filter( 'facetwp_index_row', function( $params, $class ) {
  if ( 'my_facet_name' == $params['facet_name'] ) { // Replace 'my_facet_name' with the name of your facet
    $excluded_terms = [ 'Featured', 'Reviews' ]; // Replace with the display value (not the slug) of your excluded terms
    if ( in_array( $params['facet_display_value'], $excluded_terms ) ) {
      $params['facet_value'] = '';
    }
  }
  if ( 'first_name' == $params['facet_name'] ) { // Replace 'first_name' with the name of your facet
    $excluded_terms = [ 'Bill', 'Mark' ]; // Replace with the display value (not the slug) of your excluded terms
    if ( in_array( $params['facet_display_value'], $excluded_terms ) ) {
      $params['facet_value'] = '';
    }
  }
  return $params;
}, 10, 2 );

See also