WordPress appends the_content filtered text inside last paragraph tag of content (rather than after it)

Question

Using WordPress version 3.2.1

I've noticed that when I use this filter:

add_action('the_content', 'myFunction', 0);

The content editor places the content written from "myFunction" within the last paragraph tag of the content. How can I force the WP to append the code after the last tag?

For example, if my content is...

<p>This is a paragraph</p>

And the "myFunction" routine appends "And this is some extra text" to the_content, the end result in the browser becomes:

<p>This is a paragraphAnd this is some extra text</p>

Although I want it to be:

<p>This is a paragraph</p>And this is some extra text

Answer 1

Your filter is being applied before wpautop, the filter which wraps all of the paragraphs in WordPress content with <p> tags.

A value of zero for priority means that your filter will be applied first, before all other formatting filters. Try applying your filter later - with a priority higher than 10, the default, which is where wpautop is applied.

So, add your function like this:

add_filter( 'the_content', 'myFunction', 11 );