Forminator - newly registered user as post author of new post (user registration form with postdata on it)

forminator-userreg-post-author.php

<?php 
/*
Forminator - set new user as author of new post 

This is only for user registration forms that also have postdata field
and have user activation set to "default"

Tested with Forminator 1.17.2
by adamcz/WPMU DEV


USE AS MU PLUGIN


Config explained in comments
*/

// get the entry ID into temporary $_POST key (as otherwise it's not available)
add_action( 'forminator_custom_form_submit_before_set_fields', 'forminator_usereg_author_entry_id', 20, 3 );
function forminator_usereg_author_entry_id( $entry, $form_id, $field_data_array ) {

	$_POST['_forminator_author_entry_id'] = $entry->entry_id;
	$_POST['_forminator_author_form_id']  = $form_id;

}


/* after submission is saved successfully 
- fetch entry based on saved entry ID
- find newly registered user ID
- find created post ID
- assign this user to that post
*/	
add_action( 'forminator_form_after_save_entry', 'forminator_usereg_author_set', 10, 2 );
function forminator_usereg_author_set( $form_id, $response ) {
	
	
	/* CONFIGURE HERE */
	$forms = array( 14369 ); // comma separated IDs of forms this should work with
	$usermail_field = 'email-1'; // field ID of user registration mail
	$postdata_field = 'postdata-1'; // field ID of post data field
	/* CONFIGURATION END */
	
	
	
	if ( ! in_array( $form_id, $forms ) ) {
		return;
	}
	
	if ( $response && is_array( $response ) ) {
		if ( $response['success'] ) {
			
			if ( $form_id == $_POST['_forminator_author_form_id'] ) {
				
				// fetch entry data	
				$entry =  Forminator_API::get_entry( $form_id, $_POST['_forminator_author_entry_id'] );
				
				// get new user ID
				$user_mail = $entry->meta_data[$usermail_field]['value'];
				$userid = get_user_by( 'email', $user_mail );
				
				// get new post ID
				$postid = $entry->meta_data[$postdata_field]['value']['postdata'];

				// update that post to set new user as author							
				$args = array(
					'ID' => $postid,
					'post_author' => $userid->ID,
				);
				
				wp_update_post( $args );
			
			
			}			
			
			
		}
	}
	
}