Right now I can search only through title and content.

How can I search also through a custom meta box value?


It depends. There are plugins that can add this functionality, I have used SearchWP in the past, it works well with WooCommerce.

You could also write your own custom function and add it to your theme's functions.php file. Something like this should work.

function my_custom_search( $query ) {
    if( ! is_admin() && $query->is_main_query() ) {
        if ( $query->is_search() ) { 

            $meta_query = array(
                'key'       => 'custom_meta',
                'value'     => $query->query['s'],
                'compare'   => 'LIKE'  

            $query->set('meta_query', $meta_query);


add_action('pre_get_posts' , 'my_custom_search');
  • Is this for the wp-admin screen? Here /wp-admin/edit.php?post_type=product ? Sep 11 '18 at 12:54
  • My bad, I misread your question. Try this plugin I just tried it and it works well in the admin. Go into the setting and check to allow custom field meta. Sep 11 '18 at 13:52
  • it works well in the frontend, but in the wp-admin it doesn't work. Sep 11 '18 at 15:45

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