I am using wordpress blog and i want to do change when visitors/author give comment in post/article in wordpress blog,the author url/link should open in new window so when any visitor will look at comment and if they want to go in author's website than website will open in new window(target = '_blank'). Main objective is , visitor still have your site open in tab or window and they will not navigate from your wordpress blog.
Below is the solution how to add target='_blank' in comment url of your wordpress blog.
1) Logged in to FTP/C-Panel
2) Open wp-includes/comment-template.php
Find function get_comment_author_link
$return = "<a class="url" href="$url" rel="external nofollow">$author</a>"
$return = "<a class="url" href="$url" rel="external nofollow" target="_blank">$author</a>"
Now save that file and look at a post with comment. Surely it works.