Add ARRAY for reserved name (#3150)

diff --git a/php/tests/proto/test.proto b/php/tests/proto/test.proto
index 3922925..583bf8e 100644
--- a/php/tests/proto/test.proto
+++ b/php/tests/proto/test.proto
@@ -127,6 +127,10 @@
   int32 a = 1;
 }
 
+message ARRAY {
+  int32 a = 1;
+}
+
 message TestPackedMessage {
   repeated int32    repeated_int32    = 90  [packed = true];
   repeated int64    repeated_int64    = 91  [packed = true];