How do I move a wordpress directory?

In the abc.com domain name built a wordpress station, under the Abc.com/def also built a WordPress station.
Now want to move abc.com/def to abc.com as the main station, that is, open abc.com after access to the content of the original abc.com/def.
How do I ask?

Reply content:

In the abc.com domain name built a wordpress station, under the Abc.com/def also built a WordPress station.
Now want to move abc.com/def to abc.com as the main station, that is, open abc.com after access to the content of the original abc.com/def.
How do I ask?

Just move one file:

1. Move the index.php in the Def directory to the root directory, which is the directory accessed by abc.com, and make sure that abc.com is turned on index.php, not index.html;
2. In the index.php under the root directory:
   require( dirname( __FILE__ ) . '/wp-blog-header.php' );
   Change to:
   require('./def/wp-blog-header.php');

3. Add the following code in def/wp-config.php:

   Define (' Wp_home ', ' http://abc.com ');
   Define (' Wp_siteurl ', ' http://abc.com/def ');

   Define (' Cookie_domain ', ' abc.com ');
   Define (' Wp_content_url ', ' http://abc.com/def/wp-content ');
   Define (' Wp_plugin_url ', ' http://abc.com/def/wp-content/plugins ');

1. All the files move under Webroot.
2. Modified. htaccess
3. Modify DB URL Record

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