查看已添加到WP 3.7中的date\\u查询参数WP_Query#Date_Parameters 以及author parameter.

根据需要组合这两个参数，以查询作者在给定时间内创建的所有帖子：

<?php 
 $args = array(
        \'posts_per_page\' = -1, // get all posts
        \'author\' => get_the_author_meta( \'ID\' ), // from this author ID
        \'date_query\' => array( // in the last week
            array( 
                \'year\' => date(\'Y\'),
                \'week\' => date(\'W\'),
            ),
        \'fields\' => \'ids\' // only return an array of post IDs
    ),
);
$results = new WP_Query( $args );
echo count( $results ); // display the number of results
echo $results->found_posts; // display the number of results
?>