any (preferably free) PHP web hosting service with graph database support.

hello everyone.

i am developing a PHP website which i was builind using mysql. but suddenly i realised that i need graph database for something like social network.

1) can you please help me choosing a web hosting service which have graph database support and have php integration.

OR

2) is there any alternative to graph database for social netowrking(e.g finding friends of friends).

in short.

i prefer PHP , Mysql and a free web hosting which can integrate with a graph database.

can you suggest 4 opensource and free combinations of

web language + web hosting + database + graph database

thank you very much.