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1. nathan12343
   Member
   Posted 3 years ago #
   

   I've got a function that finds out if the current page is a sub page of another. Lifted the code from a post here I think:

   <?php // detect the page tree and set the stylesheet accordingly
   function is_tree($p_id) {
   	global $post;
   	if(is_page()&&(in_array($p_id, $post->ancestors) ||
   	   $post->post_parent==$p_id ||
   	   is_page($p_id)))
   	return true;
   	else return false;
   };
   ?>

   This lets me add a style sheet according the the top level parent. Anyway. When testing the 404 page the header goes wrong:

   Warning: in_array() [function.in-array]: Wrong datatype for second argument in /home/fhlinux133/i/inq-chat.duttonsdev.co.uk/user/htdocs/inq_cms/wp-content/themes/chat_combined/desk_header.php on line 39

   with line 39 being the 3rd line of code above.

   This error is repeated 8 times.

   Any ideas?

2. s_ha_dum
   Member
   Posted 3 years ago #
   

   That's probably your call to 'in_array'. That's the only function with two arguments, and the error fits. 'in_array' needs $post->ancestors to be an array. If $post->ancestors isn't set or isn't an array you'll get that error. So you want to make sure that 'is_array' doesn't run unless $post->ancestors is an array. Something like:

   if(is_page()&&(is_array($post->acncestors) && in_array($p_id, $post->ancestors) ||

   Casting might work too.

   if(is_page()&&(in_array($p_id, (array)$post->ancestors) ||

3. nathan12343
   Member
   Posted 3 years ago #
   

   Perfect!

   The first one didn;t work. Just came back with a blank page, but the second did the trick exactly!!!

   Many thanks

4. s_ha_dum
   Member
   Posted 3 years ago #
   

   oops... well I did misspell 'ancestors' in the first one...

5. nathan12343
   Member
   Posted 3 years ago #
   

   didn't like to mention it after the help ;)

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