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1. udo kupsch
   Member
   Posted 3 years ago #
   

   Hello Community,

   I need to pass some Params to "my_callback":
   <?php add_meta_box( $id, $title, 'my_callback', $page, $context, $priority ); ?>

   First try was something like this:

   function my_callback() {
   global $params;
   }
   
   function add_my_meta_box() {
   global $param;
   $param = 'somevalue';
   add_meta_box( $id, $title, <strong>'my_callback'</strong>, $page, $context, $priority );
   }

   Did not work...

   Next try was to wrap it up in a Class to pass the params like
   $this->param = 'somevalue';
   Good plan, but when it came to my_callback, I tried something like
   

   'my_class::my_callback' or
   array ($this, 'my_callback') or
   '$this->my_callback()'

   Yes, I know, some things I tried are stupid, but I did... so what...

   I finally came up with
   

   $_SESSION['MYPARAM'] = 'somevalue';

   At least, it works. But I don´t like it.
   Is there any way to pass params to my_callback, or use add_meta_box from within a class?

   Thanks in advance!

   Best regards

   Udo

2. udo kupsch
   Member
   Posted 3 years ago #
   

   Found it.
   The Problem was not in the script, but about 1 meter in front of my monitor.
   If anyone else has this problem, try this:
   <?php add_meta_box( id, title, array(&$this, 'new_meta_boxes'), page, context, priority); ?>

   Shame on me for not knowing how to set a classmethod as callback...

3. Russell Heimlich
   Member
   Posted 3 years ago #
   

   I'm having trouble wrapping my head around this...

   Lets say I have the following:

   add_meta_box( $id, $title, $callback='display_box', $page, $context, $priority );

   function display_box(){
   //Stuff happens here...
   }

   and I want to pass an object to display_box called $box. How would I do that?

   I tried replacing the callback with array(&$box,'display_box') but that didn't work. Error log says "First argument is expected to be a valid callback" aka a string?

4. Mike Schinkel
   Member
   Posted 3 years ago #
   

   See http://wordpress.org/support/topic/379614 for how to do this since v2.8.

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