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Product Version = NetBeans IDE 8.0.2 (Build 201411181905) Operating System = Linux version 3.19.0-28-generic running on amd64 Java; VM; Vendor = 1.8.0_45-internal Runtime = OpenJDK 64-Bit Server VM 25.45-b02 Example code: public function foo(Fooable ...$fooables) { return fooBar('bar', $fooables); } Shows the second $fooables; "Variable $fooables seems to be uninitialized". This variable will be an array and should be treated as such in the editor.
I think this is Ecma6 feature.