Wordpress过去三天的所有帖子

I was wondering if there is a way to limit wp_query´s result by the creation date? I only want to get all post not older than three days.

You can use WP_Query's date parameters to accomplish this.

http://codex.wordpress.org/Class_Reference/WP_Query#Date_Parameters

$args = array(
    'date_query' => array(
        array(
            'after'     => $threeDaysAgo,  
            'inclusive' => true,  
        ),  
    ),
    'posts_per_page' => -1,
);
$query = new WP_Query( $args );

After can take strtotime() compatible strings. http://php.net/manual/en/function.strtotime.php