Fix the WordPress Delete Users functionality

gistfile1.txt

/**
	 * User AJAX Search
	 *
	 * Used for the Select2 in the User Delete admin area
	 *
	 * @since Added 2023-07-26 11:49
	 * @author Beda Schmid <beda@tukutoi.com>
	 * @return void
	 */
	public function ajax_get_users() {
		$search      = isset( $_GET['search'] ) ? $_GET['search'] : '';
		$users       = get_users(
			array(
				'search'         => esc_attr( $search ),
				'search_columns' => array(
					'user_login',
					'user_nicename',
				),
			)
		);
		$users_array = array();
		foreach ( $users as $user ) {
			$users_array[] = array('id' => $user->ID, 'text' => $user->user_login);
		}
		echo wp_json_encode( $users_array );
		wp_die();
	}

	/**
	 * On deleting a user
	 *
	 * When deleting an user, also re-assign comments, if any.
	 *
	 * @since Added 2023-07-27 09:26
	 * @author Beda Schmid <beda@tukutoi.com>
	 * @param  int $id       The user ID to be deleted.
	 * @param  int $reassign The user ID to be re-assigned.
	 * @return void
	 */
	public function on_delete_user( $id, $reassign ){
		if ( null === $reassign ) {
			return;
		}
		$comment_ids = get_comments(
			array(
				'user_id' => $id,
				'fields'  => 'ids',
			)
		);
		if ( empty( $comment_ids ) ) {
			return;
		}
		foreach ( $comment_ids as $comment_id ) {
			$userassign = get_user_by( 'id', $reassign );
			if ( ! is_a( $userassign, 'WP_User' ) ) {
				return;
			}
			wp_update_comment(
				array(
					'comment_ID'           => $comment_id,
					'user_id'              => $reassign,
					'comment_author'       => $userassign->data->user_nicename,
					'comment_author_email' => $userassign->user_email,
				),
				false
			);
		}
	}

	/**
	 * Check if user has more content
	 *
	 * If a user is deleted, WP only checks if there are posts. We also check if there are comments.
	 *
	 * @since Added 2023-07-27 09:25
	 * @author Beda Schmid <beda@tukutoi.com>
	 * @param  bool  $users_have_additional_content If the user has additional content or not.
	 * @param  array $user_ids                      Array of users to be deleted.
	 * @return bool $users_have_additional_content
	 */
	public function to_delete_users_content( $users_have_additional_content, $user_ids ) {

		foreach ( $user_ids as $user_id ) {
			$comments = get_comments(
				array(
					'user_id' => $user_id,
					'count'   => true,
				)
			);
			if ( 0 < $comments ) {
				$users_have_additional_content = true;
			} else {
				$users_have_additional_content = false;
			}

			return $users_have_additional_content;
		}

	}