Description:
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PHP must have the ability support nanoseconds.
In today high traffic and high load website. We really need to support 
nanoseconds.
think about it, in per seconds, their maybe more than 1 million trades, if you 
have not nonoseconds.
how can you know the real time it be?
We can now only using scripts like : 

echo passthru("date +%s.%N");

but this way is not native, so please add support it .
just like support microtime.

You guys may know Java has Nanoseconds function.
http://docs.oracle.com/javase/7/docs/api/java/lang/System.html#nanoTime()

Java is ready for bussiness. but what about PHP?


Test script:
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NO function can return nanoseconds native.

Expected result:
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nanoseconds

Actual result:
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no way to got it.