Wordpress - 点击主页特色图片后发布而不是图像灯箱

been figuring out how to do the following:

1. when in homepage, click on post or featured image of post
2. instead of going to post url, it opens the lightbox for the image

website is for a photographer. currently using wordpress.

was advised to change this part of the code by Auttomatic:

<a href="<?php echo esc_url( boardwalk_get_link_url() ); ?>" class="entry-link"><span class="screen-reader-text"><?php _e( 'Continue reading <span class="meta-nav">&rarr;</span>', 'boardwalk' ); ?></span></a>

with something from: post_thumbnail_url

the_post_thumbnail_url();

but cant figure it out. any help?