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Subject: [RFC] Combined Comparison Operator
From: davey@php.net (Davey Shafik)

Hey folks,

I've written up an RFC/Patch to gauge interest and get feedback on the 
addition of a combined comparison (aka: spaceship) operator.

You can see the RFC at: 
https://wiki.php.net/rfc/combined-comparison-operator

This adds a new operator "(expr) <=> (expr)" that returns 0 if both 
operands are equal, 1 if the left is greater, and -1 if the right is 
greater.

It works with all types (just as well as <, <=, >=, > work) and is great 
for usort() callbacks for example.

Code available here (against 5.6): 
https://github.com/dshafik/php-src/compare/add-spaceship-operator

I'd love to get this into 5.6, not sure if we hit feature freeze yet. 
Also, not sure if it needs 2/3 majority, but assumed so as pow did?

Thoughts?

If there is interest, I'll start adding tests. They should be fairly 
trivial.

- Davey