Explicitly print reference wrappers in debug_zval_dump()

Closes GH-6750.

1 files changed, 5 insertions, 0 deletions

diff --git a/UPGRADING b/UPGRADING
index 495b831b79..cb331ea95b 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -107,6 +107,11 @@ PHP 8.1 UPGRADE NOTES
     that ' is escaped to ' while previously it was left alone.
     Additionally, malformed UTF-8 will be replaced by a Unicode substitution
     character, instead of resulting in an empty string.
+  . debug_zval_dump() will now print reference wrappers with their refcount,
+    instead of only prepending a "&" to the value. This more accurately models
+    reference representation since PHP 7.0.
+  . debug_zval_dump() will not print "interned" instead of a dummy refcount of
+    one for interned strings and immutable arrays.
 
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 2. New Features