Here is what I have learned about the WP REST API: It is a mess of undocumented and unfinished code with great promise but frustratingly little clarity. That said, I have a workaround that I will post here, hoping it is useful to others in a similar pickle to me: I just found that I … Read more
There are two methods: get_post_meta() $attachment_meta = get_post_meta( $post->ID, ‘_wp_attachment_meta’, true ); Will return an array(): $width = $attachment_meta[‘width’]; That true as the third parameter is especially important in this case, since the metadata being queried is a serialized array. You need to return it as single, or you’re going to get an array returned, … Read more
WordPress uses SimplePie for reading feeds, not for generating feeds. You’re looking at two different things here: You want to output your custom post meta in an RSS feed. You want to read that custom post meta somewhere else. The first part is pretty easy. WordPress supports custom RSS feed templates. You can actually replace … Read more
Edit – This answer is no longer accurate for the current version of ACF, see their documentation Use the acf_save_post hook. function my_acf_save_post( $post_id ) { // vars $fields = false; // load from post if( isset($_POST[‘fields’]) ) { $fields = $_POST[‘fields’]; } // … } // run before ACF saves the $_POST[‘fields’] data add_action(‘acf_save_post’, … Read more
that could be caused by post revision being saved, and you should use wp_insert_post_data anytime you want to do something before the post is saved, here is an example plugin i just cooked up to test it and it looks like this: <?php /* Plugin Name: wpse37901 Plugin URI: http://en.bainternet.info Description: answer to http://wordpress.stackexchange.com/questions/37901/save-both-current-and-new-version-of-post-meta Version: … Read more
Edited again to demonstrate adding and removing filters: Include these general functions in your functions.php. These are the filters you will invoke for the loops where you want to limit your query by these two meta values: function date_check_join( $join ) { global $wpdb; $join .= ” JOIN “.$wpdb->postmeta.” AS startdate ON (“.$wpdb->posts.”.ID = startdate.post_id … Read more
Change your nonce verify to actually verify and update post meta, else do nothing. But don’t use exit at the top of your template. // top of page if ( isset( $_POST[‘drw_inventory’] ) && wp_verify_nonce($_POST[‘drw_inventory’],’update_drw_postmeta’) ) { //if nonce check succeeds. global $post; $postid = $post->ID; $data = $_POST[‘priceone’]; update_post_meta($postid,’metakey’,$data); } // in single.php $priceone … Read more
When you save an array as post meta, WordPress will serialize it to a string and save that string. Let’s take a simple array: array ( 1 => array ( ‘url’ => “https://wordpress.stackexchange.com/”, ‘title’ => ‘Home’ ), 3 => array ( ‘url’ => ‘http://wordpress.stackexchange.com/’, ‘title’ => ‘WordPress Stack Exchange’ ), 4 => array ( ‘url’ … Read more
The solution is using added_post_meta and updated_post_meta hook . Here is the working code . add_action( ‘added_post_meta’, ‘add_custom_field_automatically’, 10, 4 ); add_action( ‘updated_post_meta’, ‘add_custom_field_automatically’, 10, 4 ); function add_custom_field_automatically( $meta_id, $post_id, $meta_key, $meta_value ) { if ( ‘_my_meta_key’ == $meta_key ) { add_post_meta($post_id, ‘_my_new_meta_key’, $meta_value.’to something new’, true); } }
Short Answer: If you have properly validated the data, then sanitization can be made optional. Longer Answer User-supplied data and data from unknown/external sources should always be treated as untrusted even in the case where the user was actually yourself, so yes, we should always validate and/or sanitize such data. And therefore, no, please do … Read more