Where is the content cache when using apply_filters('the_content…?

Question

The following code block is giving me an accumulated result:

foreach($sections as $section) {
    $content_post = get_post($section->ID);
    $content = $content_post->post_content;
    $content = apply_filters('the_content', $content);
    echo $content;
}

If I catch the value of $content before the apply_filters(), it seems to work fine, but after and each result is appended to the previous value of $content.

If I change the final line to:

$content = wpautop($content);

It works as I want (I only need the paragraph formatting), but I am frustrated as I do not understand why the previous method hasn't worked.

Answer 1

I'm unable to replicate the problem you're describing. I'm guessing it has to do with one of two things:

An issue with $sections - how exactly is this populated?

or

A hook to 'the_content' somewhere else in your code - perhaps a filter function you wrote has a bug in it causing the duplicate content?