Readonly Classes

PHP 8.3 introduces readonly classes, allowing developers to declare an entire class as readonly. Once an object of this class is created, its properties cannot be modified, enhancing data immutability and safety.

json_validate()

The json_validate() function allows developers to check if a string is valid JSON without decoding it. This feature improves performance and enables better validation practices when dealing with large data sets.

Random Extension Enhancements

The Random extension in PHP 8.3 has been improved, offering cryptographically secure random number generation and various methods for randomizing data, which increases security and flexibility in applications.

Summary of the Documentation

PHP 8.3 introduces significant improvements with features like readonly classes for immutability, json_validate() for better JSON validation, and enhanced random number generation. These new features aim to improve performance, security, and developer experience.