Reply To: Auto-generating post_title with acf_form()

• davyww

• August 17, 2016 at 8:47 am

Here is how I would go about it, untested code.

First a function to extract the names from $_POST, by adding an action to acf/save_post()

function pre_save_user_fullname($post_id){
  if( empty($_POST['acf']) ) { return; }
  $firstname = $_POST['acf']['FIRST NAME FIELD KEY'];
  $lastname = $_POST['acf']['LAST NAME FIELD KEY'];
  $fullname = $firstname.' '.$lastname;
  return $fullname;
}
add_action('acf/save_post', 'pre_save_user_fullname', 21);

Then modifying the post data before it is written to db, by filtering wp_insert_post_data();

function user_fullname_as_post_title( $data, $postarr ) {
    if ( ! $postarr['ID'] ) return $data;
    if ( $postarr['post_type'] !== 'YOUR_POST_TYPE' ) return $data;
    $post_id = $postarr['ID'];
    $fullname = pre_save_user_fullname($post_id);
    if( empty($fullname) ) { return $data; }  
    $data['post_name'] = $fullname;
    return $data;
}
add_filter( 'wp_insert_post_data', 'user_fullname_as_post_title', 99, 2 );

If it doesn’t work, I hope it at least helps.