membership days remaining

gistfile1.php

add_shortcode('m_count_down', 'm_count_down');
function m_count_down($attr)
{
    if (class_exists('Membership_Plugin')) {
        $subscription_id = isset($attr['s_id']) ? $attr['s_id'] : 0;
        if (!is_user_logged_in()) {
            return '';
        }

        if ($subscription_id == 0) {
            return '';
        }

        if (!current_user_on_subscription($subscription_id)) {
            return '';
        }

        //get the current day left
        $subscription = new Membership_Model_Subscription($subscription_id);
        ob_start();
        $now = strtotime(current_time('mysql'));

        global $wpdb;
        $sql = "SELECT * FROM " . MEMBERSHIP_TABLE_RELATIONS . " WHERE user_id=%d AND sub_id=%d";
        $relation = $wpdb->get_row($wpdb->prepare($sql, get_current_user_id(), $subscription_id));

        $expires = strtotime($relation->expirydate);

        //get ordered subscription levels
        $levels = $subscription->get_levels();

        $tolevel_order = 1;
        $fromlevel_order = 1;
        foreach ($levels as $level) {
            if (!empty($tolevel_id) && $level->level_id == $tolevel_id) {
                $tolevel_order = $level->level_order;
                continue;
            }
            if (!empty($fromsub_id) && !empty($fromlevel_id) && $fromsub_id == $subscription->id && $level->level_id == $fromlevel_id) {
                $fromlevel_order = $level->level_order;
                continue;
            }
        }

        //sum every level period to get the subscription end date.
        foreach ($levels as $level) {
            if ($level->level_order < $tolevel_order) {
                //if entering in the middle of a subscription, jumping beginning levels, those not count
                continue;
            }
            if (($fromlevel_order < $tolevel_order) && $level->level_order == $fromlevel_order) {
                //reset to current date if already a subscription member and moving to another level
                $expires = $now;
            }
            switch ($level->level_period_unit) {
                case 'd':
                    $period = 'days';
                    break;
                case 'w':
                    $period = 'weeks';
                    break;
                case 'm':
                    $period = 'months';
                    break;
                case 'y':
                    $period = 'years';
                    break;
            }
            $expires = strtotime('+' . $level->level_period . ' ' . $period, $expires);

            if ($level->sub_type == 'indefinite') {
                //never expires
                //$expires = strtotime( '+10 years', $expires );

                break;
            } elseif ($level->sub_type == 'serial') {
                //sum only once and break - will not go to next level if exists
                break;
            }
        }
        $now = new DateTime(date('Y-m-d', time()));
        $expiry_date = new DateTime(date('Y-m-d', $expires));
        $day_left = $now->diff($expiry_date);
        echo 'Days left: ' . $day_left->days . ' days';
        $content = ob_get_contents();
        ob_end_clean();

        return $content;
    }
}