Check for checked check boxes in settings…

So I hate checkboxes in the settings API, I will tell you this much.

I have a checkbox that I set up as such:

if(!function_exists('aisis_theme_options_sidebar')){
		function aisis_theme_options_sidebar(){
			$options = get_option('aisis_core_theme_setting_sidebar');
			?>
            <input type="checkbox" name="aisis_core_theme_setting_sidebar['no_side_bar']" value="0" <?php checked( $options['no_side_bar'], 0, true ); ?>  />
            <?php
		}
	}

which just sets up a unchecked check box. We all know this.

The problem seems to be my validation:

if(!function_exists('aisis_core_theme_sidebar_validation')){
		function aisis_core_theme_sidebar_validation($input){
			$options = get_option('aisis_core_theme_setting_sidebar');
			$options['no_side_bar'] = $input['no_side_bar'];
			update_option('admin_success_message', 'true');
			return $options;
		}
	}

I am essentially saying to store what ever is in the input into the options – which we all know.

Problem?

$input[‘no_side_bar’] is empty…..even if I check the box….

How is this possible?

Inputs and text areas work just fine.