Some of Hack's features such as return type declarations and scalar type hints will be in PHP 7 due to be released later this year. PHP 7 also includes some se

Some of Hack's features such as return type declarations and scalar type hints will be in PHP 7 due to be released later this year. PHP 7 also includes some serious performance improvements, contextual parsing, anonymous classes, combined comparison operator, null coalese operator and tens of other new features.