How do I auto-update post date when new post type is fetched within the post?

Hi Zack,

I think that you have put me on the right track.

This code

add_action('wp_insert_comment','update_post_time',99,2);
function update_post_time($comment_id, $comment_object) {
    // Get the post's ID
    $post_id = $comment_object->comment_post_ID;
    // Double check for post's ID, since this value is mandatory in wp_update_post()
    if ($post_id) {
        // Get the current time
        $time = current_time('mysql');
        // Form an array of data to be updated
        $post_data = array(
            'ID'           => $post_id, 
            'post_modified'   => $time, 
            'post_modified_gmt' =>  get_gmt_from_date( $time )
        );
        // Update the post
        wp_update_post( $post_data );
    }
}

will update the “last updated” date every time a comment is posted for that post.

I need to modify the code so, that it will update the “last modified” date of that “post” post, that has the same taxonomy term (common taxonomy) as the “item” post type post, when it gets posted.

Fictive Example:

There is a “post” post called Fruits. (default post type)
And there is an “item” post called Apple. (“items” post type)

When Apple is getting posted, Fruits will fetch it automatically within a grid (via matching a common term of a common taxonomy of both posts).

And what I need is that: after Apple got posted, the “last updated” date of Fruits will get updated.

Could you give an example how to modify this code to achieve that?

• This reply was modified 3 years, 1 month ago by berry metal.

So “Apples” is new post of an “items” post type and when any “items” post is newly posted you want a post named “Fruits” to have its last modified date updated to match?

1. When any “items” post is newly posted, the term of that post need to be retrieved from X taxonomy.

2. Then a “post” post need to be found, that has the same term in the same X taxonomy (known, existing taxonomy).

3. The “last updated” date of that “post” post need to be updated to the post date of the corresponding “items” post.

Or not so much “Fruits” as any post post_type with the same taxonomy term as the newly posted “items” post?

Only “post” post types “last updated” date need to be updated. (the default post type).

Only newly published “items” posts? Or any modification of any “items” post?

Modifications (or deleting) of “items” posts do not need to trigger any date update.

The whole code for this purpose should be just a function?

Could you give an example code?

I have written it in english instead of full php, could you help me to put it 100% php?

add_action('what_here?','update_post_time',99,2);
function update_post_time($items_id, $X_taxonomy) {
    // Get the post's ID
    $post_id = $newly_posted__items_post_ID;
    if ($post_id) {
        // Get the current time
        $time = current_time('mysql');
        // Form an array of data to be updated
        $post_data = array(
            'ID'           => $items_post_id, 
            'post_modified'   => $time, 
            'post_modified_gmt' =>  get_gmt_from_date( $time )
        );
        // Update the post
        wp_update_post_post( $post_data );
    }
}

The scheduled task should be done with WP CRON?
I’m investigating that and I’ll be back.

This is how it looks at the request tab after posting an items post called “test”, that was assigned to a term from a taxonomy called “relations”:

flameshot_screenshot

• This reply was modified 3 years, 1 month ago by berry metal.
• This reply was modified 3 years, 1 month ago by berry metal.

And I checked and in the response tab there is nothing, it’s empty. In the network tools.

I tried to write it again:

add_action('save_items','update_post_time',99,2);
function update_post_time($item_id, $item_object) {
    // Get the post's ID
    $item_id = $item_object->item_id;
    // Double check for post's ID, since this value is mandatory in wp_update_post()
    if ($item_id),
    if (array_key_exists('post_type', $_POST) && $_POST['post_type'] === 'items') {
        // Get the current time
        $time = current_time('mysql');
        // Form an array of data to be updated
        $latest_cpt = get_posts("post_type=items&numberposts=1");
        $latest_cpt[0]->ID
        $post_data = array(
            'post_type' => 'items',

            'tax_query' => array(
    array(
      'taxonomy' => 'relations',
      'field' => 'term_id',
            'ID'           => $item_id, 
            'post_modified'   => $time, 
            'post_modified_gmt' =>  get_gmt_from_date( $time )

        );
    $terms = get_the_terms( $post->ID , 'items' ); or
 $terms = get_terms_id_by_post_type( array($tax), array('items') );
          if ( $terms != null ){
            foreach( $terms as $term ) {
            $term->term_id    

            <<< and how do I match the terms here? >>>

        // Update the post
        wp_update_post( $post_data );
    }
}