Problems in updating a self-developed plugin

I could solve the problem myself. Here are the resources that help in finding the (my) fault: WordPress@Stackoverflow: Update Plugin Detailed description, that explained the same as above in my workflow. Expanded version of the above WordPress Documentation: Header information in readme.txt This was the final point. I had in my readme.txt in the header: … Read more

Duplicate post on publish

It’s a normal behaviour of WordPress if you have attachments in your post and revision enable for your site. When an attachment is added to a post, the attachment post_status is inherit of the parent post, and the logic is that the ping status is set to closed. When revisions are enable, a copy of … Read more

Publish Post Action Not Working

wp_publish_post – Publish a post by transitioning the post status. Note: This function does not do anything except transition the post status. If you want to ensure post_name is set, use wp_update_post() instead. publish_{$custom_post_type} – publish_post is an action triggered whenever a post is published, or if it is edited and the status is changed … Read more