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1. till
   Member
   Posted 3 years ago #

   I wrote a plugin which is supposed to filter my post_content and add if applicable a footer to it. What I am doing is, inside the filter I grab $GLOBALS['wp_query']->post->ID and perform a couple database queries to check if the footer applies to this post.

   It's nothing special really.

   To apply the filter I did this underneath:
   add_filter('the_content', 'my_filter', 2);
add_filter('the_excerpt', 'my_filter', 2);

   The problem is - on static content pages (where the filter does not apply anyway), all works well. However, when I am on my blog's frontpage or on an entry page, it does not display any categories, blogroll and archives.

   I have no idea why.

2. Kafkaesqui
   Moderator
   Posted 3 years ago #

   Try checking the source of those pages through your browser and see if any error shows up at the location where sidebar appears to end.

   Beyond that, we'd need a lot clearer idea of what your plugin actually does to work out what's going on here.

3. till
   Member
   Posted 3 years ago #

   Ok, first of, thanks for your reply. :)

   I'll try to be more clear.

   This is my filter:
   function my_filter($string_text)
{
$post_id = $GLOBALS['wp_query']->post->ID;
if (empty($post_id))
{
return $string_text;
}
/*
query database and check if extra information
applies to this post.
*/
$query = "...";
...
if (mysql_num_rows($res) == 0)
{
return $string_text;
}
$infoObj = mysql_fetch_object($res);
$string_text.= sprintf(
'<ul><li>%s</li></ul>',
$infoObj->foo
);
return $string_text;
}

   So this is what I do.

   Checking the source, I see no HTML or PHP errors. For example, once I activate the filter, the categories are gone missing. But there is no error, it just says ">> No categories" in place where the list should be.

   Any idea?

4. till
   Member
   Posted 2 years ago #

   I checked the source code of the website again. There's no error in the HTML. Any other idea? :|

   This is the only filter doing this. The thing is also, I embeded a function to email me from inside the filter, to check the contents on the frontpage which are parsed. Nothing from the sidebar actually gets in there.

   Still, once I enable it on the frontpage as well, categories and static pages disappear. Like I'm overwriting some internal array? :|

5. till
   Member
   Posted 2 years ago #

   Ok, I found the error.

   Inside my plugin, I opened a connection. And when I closed it, it screwed up the rest of the site. So leaving it open fixed the situation for me. Not sure why though.

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