I will design and develop secure custom Website in PHP or Wordpress, that will demanded by my client.
Also I will develop website in any requested framework like Laravel or Code Igniter.
That website will be secured from all type of security issues,
SQL Injection (All types)
XSS (All types)
Others (if any needed)
I will provide general documentation for you so you can manage and modify easily by your self, so you don't have to worry about any thing.