Hook for post and page load

3 comments

1. You can use the wp hook and check the global $wp_query object or any conditional.

   add_action( 'wp', 'wpse69369_special_thingy' );
   function wpse69369_special_thingy()
   {
       if (
           'special_cpt' === get_post_type()
           AND is_singular()
       )
           return print "Yo World!";
   
       return printf(
           '<p>Nothing to see here! Check the object!<br /></p><pre>%s</pre>',
           var_export( $GLOBALS['wp_query'], true )
       );
   }
   

   See: wp in codex.wordpress.org and wp in developer.wordpress.org

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2. Use template_redirect which is the action hook that fires before rendering the template;

   add_action('template_redirect', 'hooker');
   function hooker(){
       //I load just before selecting and rendering the template to screen
   }
   

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3. I’ve quite often used the following to load in custom meta boxes on pages (rather than custom posts).

       add_action('admin_init','how_we_do_it_meta');
   
       function how_we_do_it_meta() {
   
           if ( $_SERVER['SCRIPT_NAME'] == '/wp-admin/post.php' ) {
   
               $post_id = $_GET['post'] ? $_GET['post'] : $_POST['post_ID'];
               $template_file = get_post_meta($post_id,'_wp_page_template',TRUE);
   
               if ($template_file == 'page-how-we-do-it.php') {
   
                   add_meta_box('how_we_do_it_who-meta', 'Who we work with...', 'how_we_do_it_who', 'page', 'normal', 'high');
   
                   add_action('save_post', 'save_how_we_do_it_meta');
   
               }
           }
       }
   

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