Reply To: Set featured image of CPT from existing image

• HDcms

• November 11, 2015 at 11:24 pm

Hi,

I am also interested in automatically generate thumbnail
I put this piece of code in functions.php but it does not work when I record Article
Maybe it’s because I’m in the admin?
1 / How to build this miniature that is either front-end or back office?
2 / Is optimizable by optimization plugin (weight / height of the image)?
Or is it possible to provide an image for the thumbnail?
Regards

function my_acf_save_post( $post_id ) {
    
    // get new value
 //   $value = get_field('my_field');
    
  $image = get_field('image', $post_id, false);  //image est ACF field
  $image = intval($image); // make sure it's an int
  set_post_thumbnail($post_id, $image);
    
}

// run after ACF saves the $_POST['acf'] data
add_action('acf/save_post', 'my_acf_save_post', 20);