What new features have been added to php7?

PHP 7 uses the new Zend Engine 3.0 to nearly double application performance and consume 50% more memory than PHP 5.6. It allows serving more concurrent users without requiring any additional hardware. PHP 7 is designed and refactored with today's workloads in mind.

Summary of new PHP features

Improved performance - merge PHPNG code into PHP7 at the same speed as PHP 5 twice.

Reduced memory consumption - Optimized PHP 7 uses fewer resources. (Recommended learning:PHP Video Tutorial)

Scalar type declaration - parameter and return types can now be enforced.

Consistent 64-bit Support - Consistent support for 64-bit architecture machines.

Improved Exception Hierarchy - The Exception Hierarchy has been improved

Many fatal errors are converted into thrown exceptions - The exception scope is increased to cover many fatal errors which are converted into thrown exceptions.

Secure Random Number Generator - Added new secure random number generator API.

Deprecated SAPIs and Extensions Removed - Various old and unsupported SAPIs and extensions have been removed from the latest version.

Null Coalescing Operator (?) - New null coalescing operator added.

Return and scalar type declarations - Support for added return types and parameter types.

Anonymous class - supports anonymous addition.

Zero-cost assertions - Support for zero-cost assertions was added.

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