cleverness/widget-css-classes

<?php
/**
 * Widget CSS Classes plugin uninstall
 *
 * Uninstall
 * @author Jory Hogeveen <info@keraweb.nl>
 * @package widget-css-classes
 * @version 1.5.1
 * @todo Uninstall for multi-networks
 */

//if uninstall not called from WordPress exit
if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
    die();
}

wcssc_uninstall();

if ( is_multisite() ) {
    global $wp_version;
    if ( version_compare( $wp_version, '4.5.999', '<' ) ) {
        // @codingStandardsIgnoreLine - Sadly does not work for large networks -> return false
        $blogs = wp_get_sites();
    } else {
        $blogs = get_sites();
    }
    if ( ! empty( $blogs ) ) {
        foreach ( $blogs as $blog ) {
            $blog = (array) $blog;
            wcssc_uninstall( intval( $blog['blog_id'] ) );
        }
        wcssc_uninstall( 'site' );
    }
}

function wcssc_uninstall( $blog_id = false ) {

    // Delete all options
    $option_keys = array( 'WCSSC_options', 'WCSSC_db_version' );
    if ( $blog_id ) {
        if ( 'site' === $blog_id ) {
            foreach ( $option_keys as $option_key ) {
                delete_site_option( $option_key );
            }
        } else {
            foreach ( $option_keys as $option_key ) {
                delete_blog_option( $blog_id, $option_key );
            }
        }
    } else {
        foreach ( $option_keys as $option_key ) {
            delete_option( $option_key );
        }
    }

}