PHP Manual
Appendices
Migrating from PHP 7.3.x to PHP 7.4.x
New Features
New Classes and Interfaces
New Functions
New Global Constants
Backward Incompatible Changes
Deprecated Features
Removed Extensions
Other Changes
Windows Support
New Features
New Functions
Migrating from PHP 7.3.x to PHP 7.4.x
PHP Manual
New Classes and Interfaces
Reflection
ReflectionReference