diff --git a/src/nhttpd/yhttpd_core/yhook.cpp b/src/nhttpd/yhttpd_core/yhook.cpp
index e9b9425ac..56537c057 100644
--- a/src/nhttpd/yhttpd_core/yhook.cpp
+++ b/src/nhttpd/yhttpd_core/yhook.cpp
@@ -366,6 +366,19 @@ std::string CyhookHandler::BuildHeader(bool cache) {
 	return result;
 }
 
+bool CyhookHandler::ParamList_exist(std::string keyword)
+{
+	bool exist = false;
+	unsigned int s = ParamList.size();
+	for (unsigned int i = 1; i <= s; i++)
+	{
+		exist = (ParamList[itoa(i)] == keyword);
+		if (exist)
+			break;
+	}
+	return exist;
+}
+
 //=============================================================================
 // Output helpers
 //=============================================================================
diff --git a/src/nhttpd/yhttpd_core/yhook.h b/src/nhttpd/yhttpd_core/yhook.h
index 30bf18949..0fefe46a8 100644
--- a/src/nhttpd/yhttpd_core/yhook.h
+++ b/src/nhttpd/yhttpd_core/yhook.h
@@ -199,6 +199,8 @@ public:
 	void SendRedirect(const std::string& url)	{httpStatus=HTTP_MOVED_TEMPORARILY; NewURL = url; status = HANDLED_REDIRECTION;}
 	void SendRewrite(const std::string& url)	{NewURL = url; status = HANDLED_REWRITE;}
 
+	bool ParamList_exist(std::string keyword);
+
 	int _outIndent;
 	TOutType outType;			// Outputtpe = plain (default)|xml|json
 	TOutType outStart(bool single = false);