You can use wp_generate_attachment_metadata: This function generates metadata for an image attachment. It also creates a thumbnail and other intermediate sizes of the image attachment based on the sizes defined on the Settings_Media_Screen. The second argument of the filter is the attachment ID, so it shouldn’t be a problem to add the post meta: add_filter( … Read more
An attachment is a Post The posts table contains information on the attachment post. In WordPress every uploaded media has it’s own post entry, where post_type is ‘attachment’ and post_status is ‘inherit’. In fact, you can get attachment post types using functions used to get other post types, like post, page or any CPT. That … Read more
Short version: _encloseme is added to a post when it’s published. The wp-cron process should get scheduled shortly thereafter to process the post to look for enclosures. In other words, it cleans them up normally later. Nothing to worry about. Full explanation: “Enclosures” are links in a post to something like an audio or video … Read more
Try changing hierarchical: false in your CPT definition (if your application allows). When CPT’s are set to hierarchical: true all posts will be queried in the admin dashboard which can cause memory issues.
The code snippet in question is: $check = apply_filters( “update_{$meta_type}_metadata”, null, $object_id, $meta_key, $meta_value, $prev_value ); if ( null !== $check ) return (bool) $check; This filter only allows you to prevent the updating of the metadata for a given type, not to explicitly change the metadata itself. If you want to use this filter … Read more
In general, storing PHP serialized data in database in a bad idea. It can be easily understood if you use multple key-value pairs of data in one field row, that is, you use an array or a object with one meta key. Imaging a car as the object. You can set multiple meta values to … Read more
I’m sorry, but for now there is no easy way to “enable” revisioning of postmeta. However, you can add post metadata to revisions. A guy named John Blackburn wrote a pretty good article about adding post metadata to revisions. You find it here: https://johnblackbourn.com/post-meta-revisions-wordpress
The WP_Query object accepts a post meta argument. Generally speaking you want to do the following: $my_query = new WP_Query( array( ‘post_type’ => ‘post’, ‘meta_query’ => array( array( ‘key’ => ‘project_cat’, ‘value’ => ‘my-value’, ) ), // Other query properties ) ); Where ‘my-value’ is your ‘specified value’. Example usage: add_action( ‘pre_get_posts’ , ‘my_pre_get_posts’ ); … Read more
Although I would advice you to avoid this and use a plugin for this work. Because only a dedicated plugin can help SEO. “WordPress SEO” from yoost is a great plugin for SEO. That being said, here is the code for adding meta description and keywords in header. Paste this in theme’s functions.php file. function … Read more
Dave James Miller over at GitHub nailed this one for me. None of the work is from me, I’m just posting his code wrapped into a plguin since it works perfectly as advertised: <?php /** * Plugin Name: Set default category from url parameter * Plugin URI: https://gist.github.com/davejamesmiller/1966543 * Description: enables you to setup new … Read more