#11 check user inputs to protect from code insertion attacks

[Joc]

users may insert PHP code to sniff passwords etc.
Therefore all user inputs need to be validated and PHP
code tags e.g. <?php, <%, <script language="php"...
need to be removed.

[Joc]

Logged In: YES
user_id=788877

Need a complete redesign of all input validations. Create
some kind of security layer.

Not important for prototype but crucial before production.