Create user from Gravity Forms submission (incomplete!)

Forms.php

<?php

/**
 * This is only part of a Package for WordPress
 * Call function from within a master function which has been hooked to gform_after_submission
 */
 
 private function userFromSubmission($entry, $form)
	{
		$submitted_email = '';
		$user = null;

		foreach ($form['fields'] as $field) {
			if ($field->isUserEmail) {
				$submitted_email = rgar($entry, $field->id, null);
			}
		}

		if (!empty($submitted_email) && ($existing_user = get_user_by('email', $submitted_email))) {
			return $existing_user;
		}

		if (!$user) {
			$first_name = '';
			$last_name = '';
//			$phone = '';
			$address = [];

			foreach ($form['fields'] as $field) {
				if ($field->isUserEmail) {
					$submitted_email = rgar($entry, $field->id, null);
				}
				if ($field->isUserFirstName) {
					$first_name = rgar($entry, $field->id, null);
				}
				if ($field->isUserLastName) {
					$last_name = rgar($entry, $field->id, null);
				}
				// if ($field->isUserPhone) {
				// 	$phone = (int) rgar($entry, $field->id, null);
				// }
				if ($field->isUserAddress) {
					$address = (array) rgar($entry, $field->id, null);
				}
			}

			$user_login = $submitted_email;
			if (strlen($user_login) > 60) {
				$user_login = substr($user_login, 0, 60);
			}

			$display_name = implode(' ', [$first_name, $last_name]);
			if (strlen($display_name) > 60) {
				$display_name = substr($display_name, 0, 60);
			}

			$user_id = wp_insert_user([
				'first_name' => $first_name,
				'last_name' => $last_name,
				'display_name' => $display_name,
				'user_login' => $user_login,
				'user_email' => $submitted_email,
				'user_pass' => wp_generate_password(8, false)
			]);

			if (is_wp_error($user_id)) {
				if (defined('WP_DEBUG') && WP_DEBUG === true) {
					throw new Exception(sprintf(
						__('Forms::userFromSubmission - unable to create user - %s', 'sht'),
						$user_id->get_error_message()
					));
				}
				return false;
			}

			$user = get_user_by('id', $user_id);

			if (!empty($address)) {
				foreach ($address as $key => $value) {
					update_user_meta($user->ID, $key, $value);
				}
			}

			// Send a new registration confirmation to user and website admin
			wp_new_user_notification($user->ID, null, 'both');

			return $user;
		}

		return $user;
	}