Show matching categories in search page

Question

Show matching categories in search page

Mark Devlin

2022年5月29日 18:37

my current search only shows POSTS as results.

My site has categories for George Clooney, George R.R. Martin etc. How do I get a list of categories that match the search term to show at the top of the results page?

I have tried this:

?php 
$search_query = get_search_query();

$term = get_term_by( 'name', $search_query, 'category' );
if ( !empty( $terms )  !is_wp_error( $terms ) ){
    echo "ul";
    foreach ( $terms as $term ) {
    echo "li" . $term-name . "/li"; 
    }
    echo "/ul";
}
;?

But I don't get any output

Topic categories Wordpress search

Category Web

gmazzap · Accepted Answer · 2014年8月24日 18:37

Essentially what you need is show the categories the current queried posts belong. I'll post here a function that take as argument a taaxonomy (or an array of taxonomies) and return all the terms in that (those) taxonomy(ies) that are assigned to all queried posts.

function queried_posts_terms( $taxonomies = 'category' ) {
  global $wp_query, $wpdb;
  if ( empty( $wp_query->posts ) ) return FALSE;
  $ids = wp_list_pluck( $wp_query->posts, 'ID' );
  $taxonomies = array_filter( (array) $taxonomies, function( $tax ) {
    if ( is_string( $tax ) ) {
      $tax = sanitize_title( $tax );
      return taxonomy_exists( $tax ) ? esc_sql( $tax ) : NULL;
    }
  } );
  if ( empty( $taxonomies ) ) return FALSE;
  $sql = "SELECT t.name, t.slug, t.term_group, tt.*
    FROM {$wpdb->terms} t
    INNER JOIN {$wpdb->term_taxonomy} tt ON t.term_id = tt.term_id
    INNER JOIN {$wpdb->term_relationships} tr ON tt.term_taxonomy_id = tr.term_taxonomy_id
    WHERE tr.object_id IN (" . implode( ', ', $ids ) . ")
    AND tt.taxonomy IN ('" . implode( "', '", $taxonomies ) . "')
    GROUP BY t.term_id";
  return $wpdb->get_results( $sql );
}

Once you have this function in your functions.php (or in an active plugin) in your template, propably search.php just use:

if ( is_search() ) {
  $cats = queried_posts_terms( 'category' );
  echo ! empty( $cats ) ? '<ul>' : '';
  foreach( $cats as $cat ) {
    printf( '<li><a href="%s">%s</a></li>', get_term_link($cat), esc_html($cat->name) );
  }
  echo ! empty( $cats ) ? '</ul>' : '';
}

Will S. · Accepted Answer · 2014年8月23日 19:56

You can edit your search.php file to essentially run multiple search loops, like this...

    global $query_string;

    $query_args = explode("&", $query_string);
    $search_query = array();

    foreach($query_args as $key => $string) {
        $query_split = explode("=", $string);
        $search_query[$query_split[0]] = urldecode($query_split[1]);
    } // foreach

    $first_args = $search_query;

    // set up your additional query parameters
    // I just used a sample of only getting a certain category, but you get the idea

    $first_args['cat'] = 162;
    $first_args['orderby'] = 'date';

    $first_search = new WP_Query($first_args);

    // Do your loop output stuff here

   endwhile;
   wp_reset_query();

Basically what you're doing is grabbing the query string (search string), and running a custom WP_Query using your additional parameters. After you run the first custom query to get matching categories, you can just run an additional query using the original $query_string.

I know that doesn't do EXACTLY what you want but it should give you the starting point to make it happen. I'm happy to help if you have any further questions.

Show matching categories in search page

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