如何检查数据：
使用此选项可以深入查看当前请求/wp\\u查询中可以使用的内容。
function inspect_wp_query()
{
echo \'<pre>\';
print_r($GLOBALS[\'wp_query\']);
echo \'</pre>\';
}
// If you\'re looking at other variables you might need to use different hooks
// this can sometimes be a little tricky.
// Take a look at the Action Reference: http://codex.wordpress.org/Plugin_API/Action_Reference
add_action(\'shutdown\', \'inspect_wp_query\', 999); // Query on public facing pages
add_action(\'admin_footer\', \'inspect_wp_query\', 999); // Query in admin UI
顺便说一句：
// this:
global $wp_query;
$wp_query;
// is the same as
$wp_query;
// and as this:
$GLOBALS[\'wp_query\'];
// You can do this with each other global var too, like $post, etc.
如何实际获取数据：
// Example (not the best one)
(Object) WP_Query -> post (stdClass) -> postdata (Array)
// How to get the data:
// Save object into var
$my_data = new WP_Query; // on a new object
// or on the global available object from the current request
$my_data = $GLOBALS[\'wp_query\'];
// get object/stdClass "post"
$my_post_data = $my_data->post;
// get Array
$my_post_data = $my_data[\'post\'];
示例
Generate a drop down/select object with all sidebars inside the global $wp_registered_sidebars