wordpress Meta_query按时间过滤

Question

我正在尝试使用Meta_Query创建一个带有打开复选框的过滤器。 $ opening_time和$ closing_time的值是UNIX时间。它只能与$ status_2，$ opening_time_2，$ closing_time_2一起使用，也可以不与之一起使用。 我该如何运作？

    $status =         'opening_hours_monday_day_status';
    $opening_time =   'opening_hours_monday_opening_time';
    $closing_time =   'opening_hours_monday_closing_time';
    $status_2 =       'opening_hours_monday2_day_status';
    $opening_time_2 = 'opening_hours_monday2_opening_time';
    $closing_time_2 = 'opening_hours_monday2_closing_time';
    $current_time =   strtotime('2016-01-01 ' . current_time('h:i a'));
    $element_filter_arr = array();
             if ($timings == 'open') {
                    $element_filter_arr[] = array(
                        'key' => $status,
                        'value' => 'on',
                        'compare' => '=',
                    );
                    $element_filter_arr[] = array(
                        'key' => $opening_time,
                        'value' => $current_time,
                        'compare' => '<=',
                    );
                    $element_filter_arr[] = array(
                        'key' => $closing_time,
                        'value' => $current_time,
                        'compare' => '>=',
                    );
                    $element_filter_arr[] = array(
                        'key' => $status_2,
                        'value' => 'on',
                        'compare' => '=',
                    );
                    $element_filter_arr[] = array(
                        'key' => $opening_time_2,
                        'value' => $current_time,
                        'compare' => '<=',
                    );
                    $element_filter_arr[] = array(
                        'key' => $closing_time_2,
                        'value' => $current_time,
                        'compare' => '>=',
                    );
                } 
$args = array(
                    'posts_per_page' => "-1",
                    'post_type' => 'shop',
                    'post_status' => 'publish',
                    'fields' => 'ids',
                    'meta_query' => array(
                        $element_filter_arr,
                    ),