我正在使用活动日历3。由于似乎没有简单的方法可以将所有即将发生的事件查询为帖子，因此我尝试了这种方法，从DB获取ID并从中查询帖子：

<?php if(!ec3_check_installed(__(\'Upcoming Events\',\'ec3\')))
    return;
global $ec3,$wpdb,$wp_version;

$calendar_entries = $wpdb->get_results(
    "SELECT
        p.id AS id
    FROM $ec3->schedule s
    LEFT JOIN $wpdb->posts p ON s.post_id=p.id
    WHERE p.post_status=\'publish\'
    AND end>=\'$ec3->today\' $and_before
    ORDER BY start $limit_numposts", OBJECT_K
); 

$args = array(
    \'post_type\' => \'post\',
    \'post__in\' => $calendar_entries,
    \'orderby\' => \'id\',
    \'order\' => \'DESC\'
);

$query = new WP_Query( $args );

它不起作用，显然是因为数组看起来像这样，如果我var\\u dump它：

array(2) {
    [37]=> object(stdClass)#2183 (1) { 
        ["id"]=> string(2) "37"
    }
    [8]=> object(stdClass)#2186 (1) { 
        ["id"]=> string(1) "8" 
    } 
} 

如何使用此数组进行查询？

// collect calendar id\'s
$ids = array();
foreach( $calendar_entries as  $calendar_entries):
        array_push( $ids, $calendar_entries->id );
endforeach;

// query the above calendar id\'s
$args = array(
    \'post_type\' => \'post\',
    \'post__in\' => $ids,
    \'orderby\' => \'id\',
    \'order\' => \'DESC\'
);
$query = new WP_Query( $args );