uninstall.php

<?php
//get QueryQuery Admin Options
include_once('QueryQuery_options.php');

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

//create full options to uninstall and defaults
$queryquery_UI_list = array();
foreach ($option_list_names as $option_list_name){
	$standard = "QueryQuery_".$option_list_name["name"];
	$defautl = "QueryQuery_".$option_list_name["name"]."_default";
	array_push($queryquery_UI_list,$standard,$defautl);
}
array_push($queryquery_UI_list,"QueryQuery_initialize");

foreach ($queryquery_UI_list as $UItem){
	
$option_name = $UItem;

// For Single site
if ( !is_multisite() ) 
{
    delete_option( $option_name );
} 
// For Multisite
else 
{
    // For regular options.
    global $wpdb;
    $blog_ids = $wpdb->get_col( "SELECT blog_id FROM $wpdb->blogs" );
    $original_blog_id = get_current_blog_id();
    foreach ( $blog_ids as $blog_id ) 
    {
        switch_to_blog( $blog_id );
        delete_option( $option_name );  
    }
    switch_to_blog( $original_blog_id );

    // For site options.
    delete_site_option( $option_name );  
}
}
?>