actions - Read For Learn

Run javascript code after wp_login hook?

I would do something like this: function wpse38285_wp_login( $user_login ) { set_transient( $user_login, ‘1’, 0 ); } add_action( ‘wp_login’, ‘wpse38285_wp_login’ ); function wpse38285_wp_footer() { global $current_user; get_currentuserinfo(); if ( ! is_user_logged_in() ) return; if ( ! get_transient( $current_user->user_login ) ) return; $js = <<<JS <script type=”text/javascript”> jQuery(‘<div />’) .html(‘<p>You are now logged in as <strong>$current_user->user_login</strong><br … Read more

Getting the action’s tag name within the action

Simple: current_filter(); (link to plugin.php) or global $wp_current_filter;.

How to add a “publish” link to the quick actions

Without doing Ajax (like in Quick Edit), the admin_url should be the very edit.php page. Note that: the filter post_row_actions takes two arguments, the second one being $post, so the global is not necessary. instead of using id as query argument, it’s best practice to use custom names, in this case update_id. I didn’t know … Read more

Using add_filter() in Widgets

<?php /** * Display the actual Widget * * @param Array $args * @param Array $instance */ public function widget($args, $instance){ … $wcss = apply_filters( ‘my-filter-name’, $wcss ); … } ?> To create your own filter hook just use the function “apply_filters” then as you mentioned add a function in your constructor i.e. function __constructor() … Read more

Does WP fire delete_post when trashed posts are automatically deleted?

Short answer Yes, it does 😉 Long answer The function that is used to empty the trash/remove trashed posts is called wp_scheduled_delete. When you’ll take a look at it’s code, you’ll see, that it uses wp_delete_post to delete the posts and inside wp_delete_post the action delete_post is run as you can see here.

Which to use to execute code during the saving of a plugin settings page?

If you’re using Settings API, then you should use a sanitize callback: register_setting( $option_group, $option_name, $sanitize_callback ); The myth is that the $sanitize_callback actually is a filter for your options when it’s saved in the database. This is the place where you can do something with your custom code. This is the sample code: register_setting( … Read more

flush_rewrite_rules on save_post Does Not Work on First Post Save

I know this has already been answered, but I felt as if it wasn’t 100% real clear what the actual solution was. Here’s my answer to add some clarification. He’s right… You can’t flush rewrite rules on save_post, because that action hook is fired AFTER the init action hook has been fired. As you know, … Read more

What is the ‘admin_action_’ . $_REQUEST[‘action’] hook used for?

Via the “Annotate” function the the Trac, you can see that this was added three years ago, after the request for a generic POST handler that plugins can use. Google code search tells me that at least Akismet uses this hook, and it appeared there at the time it was introduced in core. It works … Read more

Why, Where, and When to use reference pointers in filters/hooks?

The example you give is used when you’re building a plugin/theme using a class. In normal use, your functions.php file would just have: function my_function_to_filter( $args ) { // … function stuff here return $args; } add_filter(‘some_wp_filter’, ‘my_function_to_filter’); If you’re using a class, though, things would look different. You’d likely have a my-class.php file containing: … Read more

How Do I Load My Action Earlier Enough?

The page you referenced does have the correct order of events listed there. If you want to see which events were fired for a particular request you can install debug-bar and debug-bar-action-hooks. If you are wanting to send a header either plugins_loaded or init will work. But it is recommended to use the send_headers action … Read more

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