Set ACF field value programmatically

I’m posting data to a custom post type over REST that has ACF fields. I have custom code that handles the REST request and creates the post. The post is created fine, shows up in the custom post area, but I can’t figure out how to set the ACF field values. I’ve tried using add_post_meta with both the field name and the field number, and none of these options work. I think I’m missing something very simple but I’ve been googling for 3 days with no luck. Here’s the code I’m using.

$data = file_get_contents('php://input');
 $new_post = array(
        'post_title' => 'My New Post',
        'post_content' => $data,
        'post_status' => 'publish',
        'post_author' => 1,
        'post_type' => 'custompost',
        'post_category' => array(0),
    );
    
    header("Access-Control-Allow-Origin: *");
    header('Cache-Control: no-cache, must-revalidate');
    header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
    header("Content-Type: application/json; charset=UTF-8");

    // Create new post
    $post_id = wp_insert_post($new_post);
    // Update post with event data
    if (! is_wp_error($post_id)) {
        $data = json_decode(file_get_contents('php://input'));
        if (json_last_error() !== JSON_ERROR_NONE) {
            exit(json_last_error());
        }
        // I've also tried the following function with the field name instead
        // of the ACF field number
        if (! add_post_meta($post_id, 'field_5e426305bbd97', 'hello world') ) {
            header("HTTP/1.1 406");
            exit('406 (Error)');
        }        
    }

    // Send back response
    header("HTTP/1.1 200 OK");
    exit($data['event-data']['delivery-status']['code']);//'200 (Success)');

• This topic was modified 6 years, 3 months ago by prowse.