add support for file[c|m|a]time()

[marc-mabe]

It would be really great if this could contain PHP functions to get the ctime, atime and mtime of a file with nano second precision (if possible). (http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_stat.h.html)

I know it's not part of the lib this extension wraps.

[lstrojny]

Good idea. Let me think about the score but generally it sounds feasible.

[lstrojny]

Care to submit a patch?

[marc-mabe]

I'm not sure if this should be part of the base library first. Secondly I'm not a C developer so I think I don't have enough knowledge to implement it but I know PHP itself uses a POSIX standard < 2008 (I think it's 2001) so I don't know how to use it.