WordPress.org

1. adrianboston
   Member
   Posted 6 months ago #

   im trying to alter content on posts by way of a widget.
   the widget has a section in a sidebar that displays categories. and a section on each post.

   all works except add_filter is not fired, when placed INSIDE the class. why inside the class? i need a boolean on whether to fire or not. that flag is a widget control option, selected by the user. (outside of course, it is just fired as expected)

   class XXX extends WP_Plugin {
         function widget( $args, $instance ) {
   
   	   if ($instance['displayonpost'])
   	                add_filter( 'the_category', 'filter_the_category');
   
              //display categories on widget side
   
         }
   }
   
   //outside of class, but should be fine
   function filter_the_category() {
   ...
   }

   one possibility. seems like the above WP_Widget::widget function is called late in the WP sequence.
   i have tried placing that add_filter call in the WP_Widget::WP_Widget constructor but the instance properties are not set.

2. adrianboston
   Member
   Posted 6 months ago #

   ive thought about trying to load it early but that seemed to fail..
   aka

   add_action( 'plugins_loaded', create_function( '', 'register_widget("XXX");' ) );

3. adrianboston
   Member
   Posted 6 months ago #

   or get the widget instances from the widgetfactory

4. adrianboston
   Member
   Posted 6 months ago #

   ok, i used options
   options are set in the update function of the Plugin class
   

   class XXX extends WP_Plugin {
   
         function update( $new_instance, $old_instance ) {      /* Save the form changes here */
   	   $hooks = strip_tags( $new_instance['hook'] );
   	   $opts = array('hooks'=>$hooks);
   	   update_option('unique_option_nameXX', $opts);//put hooks into database
         }
   }
   
   //elsewhere in the main file, above or below. no matter.
   
   if ( is_active_widget(false, false, 'widgetname', true) ) {
      $options = get_option('unique_option_nameXX');//returns options.
      if ($options) {
         $post_hooks = explode(',',$options['hooks']);//comma separated values, if any                            
   
         foreach ($post_hooks as $hook)
         {
   	 if ($hook && function_exists($hook)) {
   	    add_filter($hook,  'filter_callback');
   	 }
         }
      }

   function filter_callback($content)
   {
   //do whatever to content
   return $content;
   }

   that is messy but does it.

Reply

You must log in to post.