How to detect custom message type inside hook_init callback response?

Question

Or do I need to use another hook? Basically, I try to perform some actions only when in admin and only for some user messages.

Answer 1

This method is simple:

/** * Based on http://wordpress.stackexchange.com/a/59999/12615 */ add_action( 'admin_head', 'wpse_59652_list_terms_exclusions' ); function wpse_59652_list_terms_exclusions() { global $current_screen; if( 'post' != $current_screen->post_type ) return; // Do your stuff } 

Other:

 /** * Based on http://wordpress.stackexchange.com/a/54279/12615 */ add_action( 'admin_notices', 'wpse_54258_display_error_message' ); function wpse_54258_display_error_message() { global $post; if( !isset( $post ) || 'page' != $post->post_type ) return; ?> <div class="error fade">This is a "page" post type</div> <?php } 

And complicated:

 /*** * Conditional enqueue of scripts according to Admin page * Based on http://wordpress.stackexchange.com/a/9095/12615 */ add_action('admin_init', 'wpse_9080_admin_init'); function wpse_9080_admin_init() { global $pagenow; global $firephp; // Using FirePHP for debugging - Remove if library not included if ( 'edit.php' == $pagenow) { if ( !isset($_GET['post_type']) ) { $firephp->log('I am the Posts listings page'); } elseif ( isset($_GET['post_type']) && 'page' == $_GET['post_type'] ) { // Will occur only in this screen: /wp-admin/edit.php?post_type=page $firephp->log('I am the Pages listings page'); } } if ('post.php' == $pagenow && isset($_GET['post']) ) { // Will occur only in this kind of screen: /wp-admin/post.php?post=285&action=edit // and it can be a Post, a Page or a CPT $post_type = get_post_type($_GET['post']); $firephp->log($post_type); if ( 'post' == $post_type ) { $firephp->log('I am editing a post'); } elseif ( 'page' == $post_type) { $firephp->log('I am editing a page'); } elseif ( 'movie' == $post_type) { $firephp->log('I am editing a custom post type'); } } if ('post-new.php' == $pagenow ) { // Will occur only in this kind of screen: /wp-admin/post-new.php // or: /wp-admin/post-new.php?post_type=page if ( !isset($_GET['post_type']) ) { $firephp->log('I am creating a new post'); } elseif ( isset($_GET['post_type']) && 'page' == $_GET['post_type'] ) { $firephp->log('I am creating a new page'); } elseif ( isset($_GET['post_type']) && 'movie' == $_GET['post_type'] ) { $firephp->log('I am creating a new custom post type'); } } }