Is there an “Add Page” hook?

2 comments

1. If you want to target the admin page that displays the post editor, you’ll likely need to hook to two places whether it’s for a script or style.

   You’d use the top two for scripts and the bottom two for styles.

   // Script action for the post new page    
   add_action( 'admin_print_scripts-post-new.php', 'example_callback' );
   
   // Script action for the post editting page    
   add_action( 'admin_print_scripts-post.php', 'example_callback' );
   
   // Style action for the post new page    
   add_action( 'admin_print_styles-post-new.php', 'example_callback' );
   
   // Style action for the post editting page 
   add_action( 'admin_print_styles-post.php', 'example_callback' );
   

   If you wanted to target a particular post type, simply global $post_type inside your callback function, like so..

   function example_callback() {
       global $post_type;
       // If not the desired post type bail here.
       if( 'your-type' != $post_type )
           return;
   
       // Else we reach here and do the enqueue / or whatever
   }
   

   If you’re enqueuing scripts(not styles) specifically there is a hook that runs earlier called admin_enqueue_scripts which passes on the hook as the first arg, so you could also do it like this for scripts..(if you were hooking onto admin_enqueue_scripts instead of the two admin_print_scripts actions above).

   function example_callback( $hook ) {
       global $post_type;
   
       // If not one of the desired pages bail here.
       if( !in_array( $hook, array( 'post-new.php', 'post.php' ) ) )
           return;
   
       // If not the desired post type bail here.
       if( 'your-type' != $post_type )
           return;
   
       // Else we reach here and do the enqueue / or whatever
   }
   

   These hooks exist exactly for this type of thing, you shouldn’t need to fire things as early as admin_init unless your specific use case dictates a requirement to. If you’re unsure, chances are you don’t need to fire your code that early.

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2. you can use the admin_init hook and add you conditionals to page something like

   add_action('admin_init','load_my_code');
   function load_my_code() {
     global $typenow;
     if (empty($typenow) && !empty($_GET['post'])) {
       $post = get_post($_GET['post']);
       $typenow = $post->post_type;
     }
     if (is_admin() && $typenow=='page') {
       //do your stuff here
     }
   }
   

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