the_content is also a filter, into which the content is passed as an argument. You simply prepend your content and then return like so. add_filter(‘the_content’,’prepend_this’); function prepend_this($content) { $content = “string to prepend” . $content; return $content }
I was working with wp_cron last week in a plugin and we have a fight and are no longer on speaking terms, but for reference this is what I do; 1) – set the scheduled cron event on register_activation_hook 2) – remove the scheduled cron event on register_deactivation_hook If you are concerned that your scheduled … Read more
For … do_action(‘admin_enqueue_scripts’, $hook_suffix); … the callback gets the hook suffix as first parameter. Since it is an action you don’t have to return anything. You can use it in a rather flexible callback function: add_action(‘admin_enqueue_scripts’, ‘wpse_49993_admin_script_callback’ ); function wpse_49993_admin_script_callback( $hook_suffix ) { switch ( $hook_suffix ) { case ‘index.php’: // dashboard // do one … Read more
First, you can use this hook to target only one custom type: https://developer.wordpress.org/reference/hooks/save_post_post-post_type/ This hook (and save_post) is called the first time when you click on “new …” and then the hook is called with $update = FALSE. Then to send e-mail only when the object is updated, you can test $update like this: const … Read more
There is a magic action all which is called on every action or filter. You can hook into this action and log all associated functions. In $GLOBALS[‘wp_filter’] which you can inspect too you can find all active hooks, eg. hooks that are actually used. I have written a small plugin T5 Debug Hook to see … Read more
I’m using the Gutenberg editor as a replacement for a whiteboard in a classroom. I’m able to make the classroom more interactive by having students work directly inside the Gutenberg editor. What a cool use of WordPress you describe there! Is it possible to load this script inside the Gutenberg editor, so that while my … Read more
Your problem is a simple typo: array($this, ‘manage_post_columns’, 10, 2) VS. array($this, ‘manage_post_columns’), 10, 2 I guess you see the difference
Your remove_action has to have a priority matching the priority used in add_action. Important: To remove a hook, the $function_to_remove and $priority arguments must match when the hook was added. This goes for both filters and actions. No warning will be given on removal failure. http://codex.wordpress.org/Function_Reference/remove_action In you case, it looks like remove_action(‘wp_head’, ‘theme_metas’); should … Read more
Short answer: no. Long answer: also no. Actions don’t work that way. Edit: To elaborate and make your question totally generic: function foo() { bar(); return 1; } function bar() { // stuff } There is nothing you can put in stuff that will prevent a call to foo() from returning 1, other than halting … Read more
From the Codex: admin_init is triggered before any other hook when a user access the admin area. This hook doesn’t provide any parameters, so it can only be used to callback a specified function. So yes, it’s run on every admin page load.