How to save the same post in multiple blogs?

You can hook on save_post or publish_post hook in each post and publish in other blogs. You must use the function switch_to_blog() to switch in other blog and then use [wp_insert_post()][2] to save a post inside this blog; do this for each blog. Alternative is you search for a plugin, there doing this; like Multi … Read more

Stop duplicate posts

You can use WP_Query to create your custom loop, and then use the offset parameter to skip the posts in the previous loop. You are going to run 3 loops from one query, so all you need to do to rerun the query is to use rewind_posts() after each loop to reset the loop Here … Read more

Is it possible to create duplicate post on other site (either push, on publish, or pull, periodically)?

You could add a filter to the post publish process in site A. The filter would check for the tag/category, and if found, run a process to create a post in Site B. See https://codex.wordpress.org/Plugin_API/Action_Reference/save_post . Something like: add_action( ‘save_post’, ‘my_site_b_create_post’ ); function my_site_b_create_post($post_id) { // check for category // if category, then save content … Read more