Update UPGRADING wrt. PR 1303

diff --git a/UPGRADING b/UPGRADING
index f6d858b5df38a1ce409a3830236fd920dafbeaf7..b3c1d19aa09169dbdf31ce166bf52b753f6a5e5c 100644 (file)
--- a/UPGRADING
+++ b/UPGRADING
@@ -37,6 +37,11 @@ PHP 7.2 UPGRADE NOTES
     property names would become inaccessible string keys.
   . Minimum supported Windows versions are Windows 7/Server 2008 R2.
 
+- PCRE:
+  . preg_match() and other PCRE functions now distinguish between unmatched
+    subpatterns and empty matches by reporting NULL and "" (empty string),
+    respectively. Formerly, either was reported as empty string.
+
 - Session:
   . Removed register_globals related code and "!" can be used as $_SESSION key name.
   . Session is made to manage session status corretly and prevents invalid operations.