Lot of features added to PHP 7, the most significant ones are mentioned below −
Improved performance − Having PHPNG code merged in PHP7, it is twice as fast as PHP 5.
Lower Memory Consumption − Optimized PHP 7 utilizes lesser resource.
Scalar type declarations − Now parameter and return types can be enforced.
Consistent 64-bit support − Consistent support for 64-bit architecture machines.
Improved Exception hierarchy − Exception hierarchy is improved.
Many fatal errors converted to Exceptions − Range of exceptions is increased covering many fatal error converted as exceptions.
Secure random number generator − Addition of new secure random number generator API.
The null coalescing operator (??) − New null coalescing operator added.
Deprecated SAPIs and extensions removed − Various old and unsupported SAPIs and extensions are removed from the latest version.
The null coalescing operator (??) − New null coalescing operator added.Return and Scalar Type Declarations − Support for return type and parameter type added.
Anonymous Classes − Support for anonymous added.
Zero cost asserts − Support for zero cost assert added
Anonymous Classes − Support for anonymous added.
