I have a custom post type called "documents". I can add documents (ACF repeater field) there and the users can see them in a frontend-view. Now i need to send an email-notification to the author of the post when i change the custom-post-type in the backend and save it.

In another project i worked with the following function in the functions.php file, but this code is just working when i create a new post. I don't need to send mails on creating a new post but when i save them again.

add_action('future_to_publish', 'send_emails_on_new_event');
add_action('new_to_publish', 'send_emails_on_new_event');
add_action('draft_to_publish' ,'send_emails_on_new_event');
add_action('auto-draft_to_publish' ,'send_emails_on_new_event');

function send_emails_on_new_event($post) {
    $emails = "[email protected]";
    $headers = 'From: Name <[email protected]>';
    $title = wp_strip_all_tags(get_the_title($post->ID));
    $message = "New post created";
    if(get_post_type($post->ID) === 'documents') {
        wp_mail($emails, "New Post", $message, $headers);

1 Answer 1


Try this way:

function send_emails_on_new_event( $post ) {

    $emails  = '[email protected]';
    $headers = 'From: Name <[email protected]>';
    $title   = wp_strip_all_tags( get_the_title( $post->ID ) );
    $message = 'New post created';

    if ( get_post_type( $post->ID ) === 'documents' ) {
        wp_mail( $emails, 'New Post', $message, $headers );
add_action( 'pre_post_update', 'send_emails_on_new_event' );

From the Code Reference:

pre_post_update: Fires immediately before an existing post is updated in the database.

  • Thank you. But this function is also sending a mail when a post is saved / for the first time. Im looking for a solution when the email is just sent when an existing post is updatet.
    – public9nf
    Sep 21, 2018 at 13:41
  • @Peesen87 this function with pre_post_update send an email every time the post (cpt: documents) is updated.
    – benny-ben
    Sep 21, 2018 at 14:11
  • @Peesen87 did you manage to make it work?
    – benny-ben
    Sep 23, 2018 at 7:50

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