Users adding point

[YC Nyon]

Hi,

I am requested to built a neighbourhood complaints application where users
(login required) can add a point to the map and this will correspond to
their description of the problem such as un-cut grass, burst pipes, etc..
Wondering anyone done this before?
What would be the best way to keep the points? shape files or a SQL
database.
I'm running php-ms.

Regards
Nyon