uninstall.php

<?php
/*
 * Uninstall - Removed Options and Transients.
 */

// Check for Un-Install constant.
if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
    exit();
}

if ( is_multisite() ) {

    global $wpdb;

    // Store Network Site ID so we can get back later.
    $current_blog = get_current_blog_id();

    // Get a list of all Blog IDs, ignore network admin with ID of 1.
    $blogs = $wpdb->get_results("
            SELECT blog_id
            FROM {$wpdb->blogs}
            WHERE site_id = '{$wpdb->siteid}'
            AND spam = '0'
            AND deleted = '0'
            AND archived = '0'
            AND blog_id != '{$current_blog}'
        ");

    foreach ( $blogs as $blog ) {

        switch_to_blog( $blog->blog_id );

        // Delete the Options we registered.
        delete_option( 'kebo_twitter_options' );
        delete_option( 'kebo_twitter_errors' );
        delete_option( 'kebo_twitter_connection' );
        delete_option( 'widget_kebo_twitter_feed_widget' );
        delete_option( 'kebo_twitter_version' );

        // Delete the Transients we registered.
        delete_transient( 'kebo_twitter_feed_' . $blog->blog_id );
        delete_transient( 'kebo_cron_is_running' );
        
    }

    // Go back to Network Site
    switch_to_blog( $current_blog );
    
} else {

    // Delete the Options we registered.
    delete_option( 'kebo_twitter_options' );
    delete_option( 'kebo_twitter_errors' );
    delete_option( 'kebo_twitter_connection' );
    delete_option( 'widget_kebo_twitter_feed_widget' );
    delete_option( 'kebo_twitter_version' );

    // Delete the Transients we registered.
    delete_transient( 'kebo_twitter_feed_1' );
    delete_transient( 'kebo_cron_is_running' );
    
}