[Multisite]How can I update custom blog option?

Question

I wanted to update custom blog option created thru Settings Api using the function update_blog_option. I created this code.

    $country_base = get_blog_option($blog_id, 'mytheme_options');//retrieve all options
    $country_base['country_base'] = $the_country;
    $currency_unit = get_blog_option($blog_id, 'mytheme_options');//retrieve all options
    $currency_unit['currency_unit'] = $d_currency;

    update_blog_option($blog_id, 'mytheme_options', $country_base);
    update_blog_option($blog_id, 'mytheme_options', $currency_unit);

However, its not working.. Is there way to update custom blog option?

Answer 1

As per the Codex on update_blog_option:

Switches to the blog id specified, runs update_option() and then restores to the current blog. If $refresh is true then it will refresh the blog details.

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Not tested, but I think your problem is trying to update elements of the array instead of the whole thing:

$the_options = get_blog_option($blog_id, 'mytheme_options');//retrieve all options

$the_options['country_base'] = $the_country;
$the_options['currency_unit'] = $d_currency;

update_blog_option($blog_id, 'mytheme_options', $the_options);

Answer 2

I think it's best just to switch_to_blog($id); and use regular functions as add_option(), get_option(), update_option(). When you're done you'd better use restore_current_blog(); to switch back.