- [X] [[ https://wiki.php.net/rfc/allow-abstract-function-override | Allow abstract function override ]]
- [X] [[ https://wiki.php.net/rfc/parameter-no-type-variance | Parameter Type Widening ]]
- [ ] [[ https://wiki.php.net/rfc/list-syntax-trailing-commas | Trailing Commas In Grouped Namepaces ]]
NOTE: Firstly implement grouped namespaces [ T6809 ]
- [X] [[ https://wiki.php.net/rfc/socket_getaddrinfo | Add 4 new internal functions for `socket_getaddrinfo()` ]]
- [X] [[ https://wiki.php.net/rfc/object-typehint | Add typehint `object` ]]
- [X] [[ https://wiki.php.net/rfc/ldap_exop | Add new LDAP EXOP internal functions ]]
- [X] [[ https://wiki.php.net/rfc/libsodium | Add libsodium internal functions and constants ]]
- [X] [[ https://wiki.php.net/rfc/hash-context.as-resource | Add internal class HashContext ]]