dbDelta() Error – Incorrect index name ” for query ALTER TABLE
You need to give it a name as well. UNIQUE KEY rowid (rowid)
plugin-development
Can I individually style items in the backend widget list?
Just as @MarkKaplun mentioned in a comment, it’s possible with CSS. Also with Javascript. CSS Approach Let’s look at the Calendar widget, as an example. The id for the widget, in the available widgets list, is of the form: widget-{integer}_calendar-__i__ and in the sidebar it’s: widget-{integer}_calendar-{integer} If we want to display the calendar dashicon before … Read more
How to untrash a post only if it was not a draft?
Just as @cybmeta mentioned, the info is stored in the post meta table. When we trash a post then the post meta key _wp_trash_meta_status is added with the value of the previous post status (publish, pending, draft, … ). Within the wp_trash_post() function, we have: add_post_meta($post_id,’_wp_trash_meta_status’, $post[‘post_status’]); add_post_meta($post_id,’_wp_trash_meta_time’, time()); We might therefore try: // Get … Read more
Is there any way to check for user login and send him to login?
When a user logs out the current user session is destroyed and no new pages can be loaded for which a user must be logged in. However, when you hit the ‘back’ button on your browser, it typically retrieves the page from the local cache. There is no contact with the server to see if … Read more
How to avoid loading same script twice?
You can use a prefix like ‘xyz-‘ (basically a namespace) for the handle if the script or stylesheet you use is unique to your theme / plugin. Owl Carousel is not, so just ‘owlcarousel’ is fine. You’d use a prefix if you didn’t want any chance another loaded plugin might be using the same name … Read more
add_filter : Passing an array instead of the callback function?
You can pass as the callback argument anything which is callable by PHP definition, something that might actually change between PHP versions. In this specific case the array($o,$m) type of notation indicates that the filter will call $o->$m
Order properties should not be accessed directly
It means you shouldn’t access $order->meta_data (and other properties) directly, but use the provided getter and setter functions. In this case, use $order->get_meta_data(). This method is (eventually) inherited from the WC_Data class.
How to print raw query from WP_Query class just like in CodeIgniter
The generated SQL is available via the request property: echo $the_query->request; where $the_query is a \WP_Query instance. Check out how it’s formed in the class here. Also available via the posts_request filter for unsuppressed filtering.
Sharing common functionality (functions, template parts) between plugins and themes?
The important thing is to make plugin and theme completely functional on their own. Let’s take a look at Codex definition of both theme and plugin: WordPress plugins allow you to easily modify, customize, and enhance a WordPress site. WordPress Themes are files that work together to create the design and functionality of a WordPress … Read more
Redirect traffic to plugin
You can use the init hook to check the $_REQUEST or $_GET super-global variable for your token value and then redirect to pages that are present via WP Core: home_url wp_login_url If you pass additional parameters to these URLs, such as token_valid=true you can use that along with conditional tags like is_front to conditionally display … Read more