PHP verses C#.NET verses D.

[Abdulhaq via Digitalmars-d]

First off I would stress that architecture and process are more 
important than which of those 3 languages you choose, i.e. good 
testing (I prefer test driven), continuous integration, and a 
solid architecture that you are confident will provide the 
reliability, correctness  and uptime that you require.

Having said that I would then personally be conservative and 
choose to standardise on C# for its maturity, expressiveness and 
great tooling. It also has a good ecosystem (libraries etc.) 
which will prove very useful in business related tasks.

D has better expressiveness and probably would run faster but 
given all the other factors I would be concerned right now about 
its slight lack of maturity and under-developed ecosystem.