Tyson Andre

Warn about `"${}"` string interpolation being deprecated in php 8.2

1

https://wiki.php.net/rfc/deprecate_dollar_brace_string_interpolation Depends on a planned php-ast change

Phan should warn about invalid inheritance for https://wiki.php.net/rfc/readonly_classes Related to #4684 ```php php > readonly class B {} php > class C extends B{} Fatal error: Non-readonly class C cannot...

https://wiki.php.net/rfc/readonly_classes

https://wiki.php.net/rfc/partially-supported-callables-expand-deprecation-notices ```php

Change type signatures for php 8.2 delta signature maps

(When the implementation is merged) And warn about backwards compatibility based on minimum target php version https://wiki.php.net/rfc/constants_in_traits

Improve analysis of null coalescing in conditions

2

Currently, it's unimplemented for variables and properties of $this. Some of these should imply the variable is guaranteed to be defined (e.g. in loops or the global scope) ```php

Raise severity of undefined variable warnings when coalescing is not used

Support "Allow null and false as stand-alone types" RFC

1

https://wiki.php.net/rfc/null-false-standalone-types - Emit compatibility warnings - Support parsing standalone null - Support parsing standalone false

Draft PR for #4618