selected() was big help for setting a default value. The rest I found in this brilliant meta box tutorial: http://code.tutsplus.com/tutorials/how-to-create-custom-wordpress-writemeta-boxes–wp-20336 with examples for text input, checkboxes and dropdown. Also Custom post type’s slug gets wrong when adding a custom meta box explained me how to correctly handle the current post object so it doesn’t get … Read more
The save_post action also passes three parameters to your callback, one of which being $update which denotes whether the post being saved is an existing post or not. /** * Save post metadata when a post is saved. * * @param int $post_id The post ID. * @param post $post The post object. * @param … Read more
Post format for the post is term of native post_format taxonomy. It can be set for the post by set_post_format() function. As with any taxonomy you can also use some deeper level function, but really there is no need. And I definitely don’t recommend to try and deal with terms and taxonomies directly in database … Read more
TL;DR: No, you can use save_post. Unless you consider programmatic modification of only metadata “modifying a post”. There (theoretically) is a way of modifying a post without triggering the save_post action hook: Direct modification of the database. But for one no plugin or theme author in his right mind would go that route and for … Read more
One of the two IDs might be a post revision. To prevent this behaviour, I always have this checks in my save_postdata function: // Autosave, do nothing if ( defined( ‘DOING_AUTOSAVE’ ) && DOING_AUTOSAVE ) return; // AJAX? Not used here if ( defined( ‘DOING_AJAX’ ) && DOING_AJAX ) return; // Check user permissions if … Read more
A draft or “blank” is saved as soon as you start to create a new post. Those new posts have the post_status of auto-draft. Check for that to prevent your callback from firing on those “blank” post saves. function update_test( $post_id, $post ) { if (isset($post->post_status) && ‘auto-draft’ == $post->post_status) { return; } update_post_meta($post_id, ‘copied’, … Read more
You need to match the $priority you used to hook the action: remove_action( ‘save_post’, array( $this, ‘save_box’ ), 20 /* Same as add_action call */ ); http://codex.wordpress.org/Function_Reference/remove_action Make sure you take the $post_id argument in your save_box method too: function save_box( $post_id ) { … }
Based on your comment you appear to be using the REST API. There’s no hook between uploading the file and creating the attachment post that could be used for this purpose in the API endpoint. The best you can do appears to be to use the rest_insert_attachment action. It provides callback functions with the WP_Post … Read more
It’s inlineeditnonce. Check line 1185 of admin-ajax.php for details.
What to use: wp_is_post_autosave( $post_id ) or DOING_AUTOSAVE?