Can I use Php to work with SQL Server 2008 Express?

Hi,

I have a friend that has been developing using Php and MySQL for 10 years; he uses a Mac.

Now he is considering to develop a new web project using Php and SQL Server 2008 Express.

My questions are:

1) Can he use Php to write the logic to access SQL server 2008 Express?

2) Can he do so on his Mac computer? If so, is there any specific dev env. or tool he has to use?

Can he install VWD2010 or VS2010 Express on his Mac?

3) ANy other advice on this situation?

Thanks!

CLaudia