What is new in PHP 7 and PHP 8?

PHP 7:

Improved Performance: Significant performance improvements due to optimizations and innovations in the Zend Engine.

Scalar Type Declarations: The ability to specify types for scalar values (int, float, string, bool).

Return Type Declarations: Now you can specify the type that a function returns.

PHP 8:

Union Types: Allows specifying more than one type for arguments, variables, and function results.

Named Arguments: Enables passing function arguments by their names, making code more readable and understandable.

Attributes: Introduction of attributes for declaratively specifying metadata without using comments.

Nullsafe Operator: Operator for simplifying null checks.

Match Expression: A new way to use switch, more readable and powerful.