按日期排序，在php / wordpress中设置数据

Question

I have a custom post type "books" and in it there is a custom_field called "publication date". The data in this field typically looks like this "November 2014" or "July 2013".

There's already a lot of books with these values added in and I need a way to sort the posts by this publication date, instead of manually changing the publication date to a better value.

Publication date is not to the published date of the post.

Thanks!

Answer 1

I hope this help:

   $args = array( 
      'post_type' => 'books',
      'meta_key' = 'publication_date',
      'orderby' => 'meta_value',
      'order'=>'ASC' 
    );