Update & the internal WP HTTP API A slightly modified version of my answer to this question, but also as a plugin that shows how it could work. Note: The code is not tested – I don’t know your server setup, etc. – and just written out of my head. You’ll have to test it, … Read more
Sure, that’s called has_action, which is an alias of has_filter. Usage: if ( has_action(‘hook_name’) ) { throw new \Exception(‘You cannot hook to a protected action.’); } else { do_action(‘hook_name’); } These two functions access the global array $wp_filter that stores all of the filters / actions
Load at the sidebar bottom In most of the sidebars, you’ll find the call to the wp_meta() action hook, where you can hook into the (mostly bottom) of a sidebar. Load on top of your sidebar The function get_sidebar( $name ) calls the sidebar you want in your template (this allows to have different sidebars). … Read more
Yes, this can be done. Ultimately, adding and removing a widget to/from a sidebar means updating an option in the database with a call like this: update_option( ‘sidebars_widgets’, array( … ) ) If you look at the code of update_option you see that there is a filter called just before the actual update. So if … Read more
The post_updated action gives you both old and new values as arguments before the new values are saved: do_action( ‘post_updated’, $post_ID, $post_after, $post_before );
Digging through the code, it’s pretty straight-forward to find. First, look at the template used for product archives – /templates/archive-product.php. Among other things, it sets up the regular queries and begins building the markup of the page. But when it actually starts looping through each product, it delegates the work to /templates/loop-shop.php. This template is … Read more
Hooks The hooks you’re searching for are ‘pre_set_site_transient_update_plugins’ and ‘upgrader_post_install’ The later takes three arguments. Example: function upgrader_post_install_cb( $true, $hook_extra, $result ) and should be used for: Move & activate the plugin, echo the update message. Moving plugins Moving works like this: $wp_filesystem->move( $result[‘destination’] ,’your_destination_path’ ); Then use activate_plugin( ‘path/file’ ); after moving.
Your code works just fine on my end. So, I’d say your problem is elsewhere. Troubleshooting guide. You can use standard debugging or FirePHP. I also use the following for cases where FirePHP doesn’t display information, i.e., save_post. function my_log( $msg, $title=”” ) { $error_dir=”/Applications/MAMP/logs/php_error.log”; $date = date( ‘d.m.Y h:i:s’ ); $msg = print_r( $msg, … Read more
Two action hooks run when a post is trashed wp_trash_post before the post is trashed and trashed_post afterwards. These run for any post type including attachments. See wp-includes/post.php If you want to limit your function to a specific post type you need to run a check in you callback function. function my_trash_action( $post_id ) { … Read more
First off, you should not register functions loose in functions.php because you cannot remove them (using remove_action). It can also cause debug errors since WP may not yet be stable. By using a hook you are making sure WP is stable enough to run your code, and what you need to use has been loaded. … Read more