wp_set_post_tags example

$data['post_name'] = wp_unique_post_slug( sanitize_title( $data['post_title']$post_id )$post_id$data['post_status']$post_type$post_parent );

        $wpdb->update( $wpdb->posts, array( 'post_name' => $data['post_name'] )$where );
        clean_post_cache( $post_id );
    }

    if ( is_object_in_taxonomy( $post_type, 'category' ) ) {
        wp_set_post_categories( $post_id$post_category );
    }

    if ( isset( $postarr['tags_input'] ) && is_object_in_taxonomy( $post_type, 'post_tag' ) ) {
        wp_set_post_tags( $post_id$postarr['tags_input'] );
    }

    // Add default term for all associated custom taxonomies.     if ( 'auto-draft' !== $post_status ) {
        foreach ( get_object_taxonomies( $post_type, 'object' ) as $taxonomy => $tax_object ) {

            if ( ! empty( $tax_object->default_term ) ) {

                // Filter out empty terms.                 if ( isset( $postarr['tax_input'][ $taxonomy ] ) && is_array( $postarr['tax_input'][ $taxonomy ] ) ) {
                    $postarr['tax_input'][ $taxonomy ] = array_filter( $postarr['tax_input'][ $taxonomy ] );
                }
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