I added a function to the filter hook tag 'content_filtered_edit_pre', but it doesn't seem to fire no matter what I do. I am also aware of 'content_edit_pre', but I am curious as to when this filter hook is called. The following does not result in 'filtered ' being added to the front of my post when I open it in the edit screen, even after another filter has been run:

function test_of_content_filtered_edit_pre( $content, $post_id ) {
    return "filtered ".$content;
add_filter( 'content_filtered_edit_pre', 'test_of_content_filtered_edit_pre', 10, 2 );

The only documentation I can find on the Internet seems to be from the wordpress codex or copies of it.

  • The Codex says This filter runs in wp-admin when loading a post for editing. Jan 28, 2014 at 8:23
  • I saw that too - in the tests I ran though, only 'content_edit_pre' ran at this time and not 'content_filtered_edit_pre'. Would you be able to provide an example of an instance where it works for you?
    – bnp887
    Jan 28, 2014 at 8:41
  • What's the status of the question, is it still unsolved?
    – birgire
    Feb 3, 2014 at 15:13
  • Your comment to look at the answer by @G.M helped a lot! Sorry, I've been away so didn't mark it as solved yet.
    – bnp887
    Feb 4, 2014 at 0:20

1 Answer 1


This is activated within the sanitize_post_field() function:

Calls 'edit_{$field}' and '{$field_no_prefix}_edit_pre' passing $value and $post_id if $context is 'edit' and field name prefix is 'post_'.

So in the case of the post_content_filtered field, the filters are



  • Thank you for your answer - I tried forcing a call to sanitize_post_field(), and still didn't get it to fire. May because it requires a 'post_' prefix. I'll keep investigating.
    – bnp887
    Jan 28, 2014 at 13:54
  • How did you test it? Try for example echo sanitize_post_field( 'post_content_filtered', 'abc', 1 ,'edit' );
    – birgire
    Jan 28, 2014 at 15:22
  • ps. check for example this informative answer by @G.M on how the field post_content_filtered is treated in wp_updated_post(). It's filtered but not saved, when you update your post, as far as I understand it.
    – birgire
    Jan 28, 2014 at 15:29

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