Code-Snippets-Functions/Execute a function on a child site/Relevanssi/pin-a-post-for-all-searches.txt

add_filter( 'relevanssi_hits_filter', function( $hits ) {
    $pinned_post_id = 1234;
    if ( ! in_array( $pinned_post_id, array_column( $hits[0], 'ID' ), false ) ) {
        $pinned_post = get_post( $pinned_post_id );
        array_unshift( $hits[0], $pinned_post );
    }
    return $hits;
}, 11 );