If you want to put PHP code in the editor you need a plugin, same goes for display-posts.
Display Posts shortcode isn’t a built in function. https://wordpress.org/plugins/display-posts-shortcode/
If you want to put PHP code in the editor you need a plugin, same goes for display-posts.
Display Posts shortcode isn’t a built in function. https://wordpress.org/plugins/display-posts-shortcode/