PHP 7 Scalar Types Declarations

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What kind of variable types does the new PHP 7 handles now? Does it include all of those in initial 7.0 version? Which ones have been added and which still awaits implementations?
Extend the typing of function parameters from objects and arrays to primitive types like string, ints or booleans.


"Learn what are Scalar Types, why do we need them and how to use new things like: String, Int, Float and Bool in all new PHP7. The PHP is no longer limited to custom objects, arrays and mixed variable ..."

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