Typically my job description limits me to code-review of web applications. More recently I've been asked to assist with some server-side PHP optimization where, although I am familiar with it, I lack experience.
I have come across a configuration setting called:
Are there any implications I should be aware of by utilizing this setting (other than the obvious function x() will be disabled and any application that uses function x() will then not work)?
If it is something I should be taking advantage of, I can come up with a list of many functions which could be dangerous, however some may be necessary regardless. Does anyone have a list, or have some suggestions to add as far as which functions should be disabled and why in case I miss/overlook some?
Any insight would be appreciated as although I know plenty of unsafe functions, my server configuration experience is lacking.
EDIT: To clear up any question as to whether this is on or off topic, I was asked to assist with OPTIMIZING the PHP enviroment for increased SECURITY, but I'm asking specifically about the aforementioned configuration setting. :)