Fixed various crashes because hidden pointers were not persistently stored

Copying the result value of a function has been fixed
New C++ nullptr type is supported for Php::Value

1 files changed, 1 insertions, 0 deletions

diff --git a/phpcpp.h b/phpcpp.h
index 13307be..37660ec 100644
--- a/phpcpp.h
+++ b/phpcpp.h
@@ -16,6 +16,7 @@
 #include <vector>
 #include <map>
 #include <memory>
+#include <set>
 
 /**
  *  Include all headers files that are related to this library