Here is a simple working way to display related posts from same category in sidebar without plugin in WordPress. For each post you can display related posts (of same category) in the sidebar.<\/p>\n\n\n\n
1. Add following code in your wordPress theme’s <\/strong>functions.php<\/strong><\/em> file:<\/strong><\/p>\n\n\n\n 2. Add the following code in the <\/strong>wp-includes\/widgets\/class-wp-widget-recent-posts.php<\/strong><\/em> file at the beginning of <\/strong>widget <\/strong><\/em>function:<\/strong><\/p>\n\n\n\n Now open any single post and check sidebar. You will notice Related Posts<\/strong> widget above Recent Posts which will list all related posts from same category. I have also added a condition not to display related posts widget in the home page (as it does not make sense).<\/p>\n\n\n\n If you liked this article or if you have any query, please leave your thoughts in the comment box below.<\/p>\n","protected":false},"excerpt":{"rendered":" Here is a simple working way to display related posts from same category in sidebar without plugin in WordPress. For each post you can display related posts (of same category) [ … ]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[107,106,110,108,109],"class_list":["post-182","post","type-post","status-publish","format-standard","hentry","category-wordpress","tag-display-related-posts-in-sidebar-in-wordpress-without-plugin","tag-display-related-posts-in-wordpress-without-plugin","tag-related-posts-without-plugin","tag-wordpress-display-related-posts-from-same-category-without-plugin","tag-wp-related-posts-in-sidebar-without-plugin","list-style-post"],"_links":{"self":[{"href":"https:\/\/datatype.co.in\/blog\/wp-json\/wp\/v2\/posts\/182","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/datatype.co.in\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/datatype.co.in\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/datatype.co.in\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/datatype.co.in\/blog\/wp-json\/wp\/v2\/comments?post=182"}],"version-history":[{"count":21,"href":"https:\/\/datatype.co.in\/blog\/wp-json\/wp\/v2\/posts\/182\/revisions"}],"predecessor-version":[{"id":351,"href":"https:\/\/datatype.co.in\/blog\/wp-json\/wp\/v2\/posts\/182\/revisions\/351"}],"wp:attachment":[{"href":"https:\/\/datatype.co.in\/blog\/wp-json\/wp\/v2\/media?parent=182"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/datatype.co.in\/blog\/wp-json\/wp\/v2\/categories?post=182"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/datatype.co.in\/blog\/wp-json\/wp\/v2\/tags?post=182"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}function show_related_post() {\n\t$args = array(\n 'category__in' => wp_get_post_categories( get_queried_object_id() ),\n 'posts_per_page' => 5,\n 'orderby' => 'rand',\n 'post__not_in' => array( get_queried_object_id() )\n );\n $the_query = new WP_Query( $args );\n if ( $the_query->have_posts() ) : ?> \n\t<section id=\"recent-posts\" class=\"widget widget_recent_entries\">\t\t \n <h2 class=\"widget-title\">Related Articles<\/h2>\n <ul class=\"\">\n <!-- the loop -->\n <?php while ( $the_query->have_posts() ) : $the_query->the_post(); ?>\n <li>\n <a href=\"<?php the_permalink(); ?>\" title=\"<?php the_title_attribute(); ?>\">\n <?php the_title(); ?>\n <\/a>\n <\/li>\n <?php endwhile; ?>\n <!-- end of the loop -->\n <\/ul>\n\t<\/section>\n <?php wp_reset_postdata(); ?>\n <?php endif; \n} ?><\/code><\/pre>\n\n\n\npublic function widget( $args, $instance ) \n\/\/ Code to display related posts\n if(!is_home()){\n show_related_post();\n }\n...\n}<\/code><\/pre>\n\n\n\n