Search Post Title Only [duplicate]

I didn’t test the code below, but I guess it works.

/**
 * Search SQL filter for matching against post title only.
 */
function __search_by_title_only( $search, &$wp_query )
{
     /*my solution */
     if($_GET['post_type'] != 'attorney' )
        return $search;
     /*my solution*/


     //please copy the rest of the code from the link below
}
add_filter( 'posts_search', '__search_by_title_only', 500, 2 );

how to limit search to post titles?