Add this code to your functions.php
file:
// Generate Link to posts page function archi_get_post_page_url() { if( 'page' == get_option( 'show_on_front' ) ) { return get_permalink( get_option('page_for_posts' ) ); } else { return home_url();} }
And then in your theme file where you want the link to display:
<a href="<?php echo archi_get_post_page_url();?>">Back to all post page</a>