Using WordPress ‘get_previous_post()’ PHP function
Retrieves the previous post that is adjacent to the current post.
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Using WordPress ‘get_post_type_archive_template()’ PHP function
Retrieves path of post type archive template in current or parent template.
Using WordPress ‘get_post_field()’ PHP function
Retrieves data from a post field based on Post ID.
Using WordPress ‘get_post_gallery_images()’ PHP function
Checks a post’s content for galleries and return the image srcs for the first found gallery.