The code you have provided is incomplete. Not sure if that is the only code you are using to achieve what you want. So, besides first code block which you have provided, bellow I am adding all rest of the code which is required to show the new field on backend in ‘Order Details’ box … Read more
The easiest way is to add Javascript validation via the jQuery Validate plugin. Here’s the most basic walkthrough: Near your add_meta_box call, enqueue the jQuery Validate plugin as well as a JS file for your simple script: add_action(‘admin_enqueue_scripts’, ‘add_my_js’); function add_my_js(){ wp_enqueue_script(‘my_validate’, ‘path/to/jquery.validate.min.js’, array(‘jquery’)); wp_enqueue_script(‘my_script_js’, ‘path/to/my_script.js’); } Then in my_script.js include the following: jQuery().ready(function() { … Read more
From the codex for custom fields: The PostMeta information is stored in a new table, $wpdb->postmeta. This table has four fields: ‘meta_id’ – A unique id for each entry. ‘post_id’ – The ID of the post for this metadata. ‘meta_key’ – The name of the ‘key’. ‘meta_value’ – The value associated with the key. This … Read more
After adding our custom column, we are ready to expand our Post Quick Edit menu using the quick_edit_custom_box action hook. Note – The quick_edit_custom_box action hook will not fire unless there are custom columns present. That is why we started by adding a custom column. add_action(‘quick_edit_custom_box’, ‘shiba_add_quick_edit’, 10, 2); function shiba_add_quick_edit($column_name, $post_type) { if ($column_name … Read more
@Musa how can we put multiple order value for the fields? I was wondering the same question and I found this : In 4.0, you can now pass an array to WP_Query as the value for orderby. The syntax looks like: $q = new WP_Query( array( ‘orderby’ => array( ‘title’ => ‘DESC’, ‘menu_order’ => ‘ASC’ … Read more
As m0r7if3r pointed out, there is no way of preventing a post from being published using the save_post hook, since the by the time that hook is fired, the post is already saved. The following, however, will allow you to revert the status without using wp_insert_post_data and without causing an infinite loop. The following is … Read more
By default, WP_Query returns the standard WP_Post objects for the posts being queried. I believe with some clever rewrite and use of the filters given in WP_Query you can add objects to the returned WP_Post objects array. Will this be performant? In my opinion, it will hurt performance more as you will need to join … Read more
I think the best balance between efficiency, and using proper wordpress methods for adding javascript would be adding something along these lines to your themes functions.php file. For Example: functions.php: function load_scripts() { global $post; if( is_page() || is_single() ) { switch($post->post_name) // post_name is the post slug which is more consistent for matching to … Read more
Well, you are using: get_post_meta(get_the_ID(), ‘subtitle’, TRUE); So, you are saying to WordPress to get the meta value of the ‘subtitle’ field and that the returned value be in format of string. See get_post_meta() docu. To get all meta data of a post you should use get_post_custom() function instead. For example, if you are inside … Read more
This is probably more complicated than you think, I would look into using a framework: http://wpgear.org/#meta-fields If you want to write your own , here are some decent tutorials: http://net.tutsplus.com/tutorials/wordpress/creating-custom-fields-for-attachments-in-wordpress/ http://sltaylor.co.uk/blog/control-your-own-wordpress-custom-fields/ http://thinkvitamin.com/code/create-your-first-wordpress-custom-post-type/