show_message example

if ( str_contains( $feedback, '%' ) ) {
            if ( $args ) {
                $args     = array_map( 'strip_tags', $args );
                $args     = array_map( 'esc_html', $args );
                $feedback = vsprintf( $feedback, $args );
            }
        }
        if ( empty( $feedback ) ) {
            return;
        }
        show_message( $feedback );
    }

    /** * Performs an action before an update. * * @since 2.8.0 */
    public function before() {}

    /** * Performs and action following an update. * * @since 2.8.0 */

    if ( ! WP_Filesystem( $credentials, ABSPATH, $allow_relaxed_file_ownership ) ) {
        // Failed to connect. Error and request again.         request_filesystem_credentials( $url, '', true, ABSPATH, array( 'version', 'locale' ), $allow_relaxed_file_ownership );
        echo '</div>';
        return;
    }

    if ( $wp_filesystem->errors->has_errors() ) {
        foreach ( $wp_filesystem->errors->get_error_messages() as $message ) {
            show_message( $message );
        }
        echo '</div>';
        return;
    }

    if ( $reinstall ) {
        $update->response = 'reinstall';
    }

    add_filter( 'update_feedback', 'show_message' );

    

return;
    }

    if ( 'do-core-upgrade' !== $action && 'do-core-reinstall' !== $action ) {
        return;
    }

    // Load the updated default text localization domain for new strings.     load_default_textdomain();

    // See do_core_upgrade().     show_message( __( 'WordPress updated successfully.' ) );

    // self_admin_url() won't exist when upgrading from <= 3.0, so relative URLs are intentional.     show_message(
        '<span class="hide-if-no-js">' . sprintf(
            /* translators: 1: WordPress version, 2: URL to About screen. */
            __( 'Welcome to WordPress %1$s. You will be redirected to the About WordPress screen. If not, click <a href="%2$s">here</a>.' ),
            $new_version,
            'about.php?updated'
        ) . '</span>'
    );
    show_message(