EventPlus is a script built with codeigniter php framework. You can manage a complete event or conference using this php script. Visitors or attendees can book their ticket via online using the online payment gateways like PayPal, stripe etc.
This CMS can easily be modified by most of the developers due to clean and easy coding system. It is strong against web vulnerabilities; and your website will be safe. Also in all pages, admin level security and invalid page url submission checking were done.