diff --git a/server/core/Network.php b/server/core/Network.php
index fef3512..9564f06 100755
--- a/server/core/Network.php
+++ b/server/core/Network.php
@@ -14,8 +14,6 @@ use OpenCloud\Common\Error\BaseError;
 use OpenCloud\Common\Error\NotImplementedError;
 use OpenCloud\Common\Error\UserInputError;
 
-include("CoreInterface.php");
-
 /**
 * Network Class of the back-end application
 *
@@ -73,24 +71,29 @@ class network{
 	{
 		$options = array();
 		// check the name if it is null
-		if (isset($this->app->getPostParam("name")))
+		$name = $this->app->getPostParam("name");
+		$adminStateUp = $this->app->getPostParam("adminStateUp");
+		$shared = $this->app->getPostParam("shared");
+		$tenantId = $this->app->getPostParam("tenantId");
+
+		if (isset($name))
 		{
-			$options['name'] = $this->app->getPostParam("name"); 
+			$options['name'] = $name; 
 		}
 		// check the adminStateUp if it is null
-		if (isset($this->app->getPostParam("adminStateUp")))
+		if (isset($adminStateUp))
 		{
-			$options['adminStateUp'] = $this->app->getPostParam("adminStateUp"); 
+			$options['adminStateUp'] = $adminStateUp; 
 		}
 		// check the shared if it is null
-		if (isset($this->app->getPostParam("shared")))
+		if (isset($shared))
 		{
-			$options['shared'] = $this->app->getPostParam("shared"); 
+			$options['shared'] = $shared; 
 		}
 		// check the tenantId if it is null
-		if (isset($this->app->getPostParam("tenantId")))
+		if (isset($tenantId))
 		{
-			$options['tenantId'] = $this->app->getPostParam("tenantId"); 
+			$options['tenantId'] =$tenantId; 
 		}
 		try
 		{
@@ -138,49 +141,61 @@ class network{
 
 	private function create_subnet()
 	{	$options = array();
-		if (isset($this->app->getPostParam("networkId")))
+		$networkId = $this->app->getPostParam("networkId");
+		$ipVersion = $this->app->getPostParam("ipVersion");
+		$cidr = $this->app->getPostParam("cidr");
+		$tenantId = $this->app->getPostParam("tenantId");
+		$name = $this->app->getPostParam("name");
+		$gatewayIp = $this->app->getPostParam("gatewayIp");
+		$dnsNameservers = $this->app->getPostParam("dnsNameservers");
+		$allocationPools = $this->app->getPostParam("allocationPools");
+		$hostRoutes = $this->app->getPostParam("hostRoutes");
+		$enableDhcp = $this->app->getPostParam("enableDhcp");
+		$tenantId = $this->app->getPostParam("tenantId");
+
+		if (isset($networkId))
 		{
 			$options['networkId'] = $networkId; 
 		}
-		if (isset($this->app->getPostParam("ipVersion")))
+		if (isset($ipVersion))
 		{
-			$options['ipVersion'] = $this->app->getPostParam("ipVersion"); 
+			$options['ipVersion'] = $ipVersion; 
 		}
-		if (isset($this->app->getPostParam("cidr")))
+		if (isset($cidr))
 		{
-			$options['cidr'] = $this->app->getPostParam("cidr"); 
+			$options['cidr'] = $cidr; 
 		}
-		if (isset($this->app->getPostParam("tenantId")))
+		if (isset($tenantId))
 		{
-			$options['tenantId'] = $this->app->getPostParam("tenantId"); 
+			$options['tenantId'] = $tenantId; 
 		}
-		if (isset($this->app->getPostParam("name")))
+		if (isset($name))
 		{
-			$options['name'] = $$this->app->getPostParam("name"); 
+			$options['name'] = $name; 
 		}
-		if (isset($this->app->getPostParam("gatewayIp")))
+		if (isset($gatewayIp))
 		{
-			$options['gatewayIp'] = $this->app->getPostParam("gatewayIp"); 
+			$options['gatewayIp'] = $gatewayIp; 
 		}
-		if (isset($this->app->getPostParam("dnsNameservers")))
+		if (isset($dnsNameservers))
 		{
-			$options['dnsNameservers'] = $this->app->getPostParam("dnsNameservers"); 
+			$options['dnsNameservers'] = $dnsNameservers; 
 		}
-		if (isset($this->app->getPostParam("allocationPools")))
+		if (isset($allocationPools))
 		{
-			$options['allocationPools'] = $this->app->getPostParam("allocationPools"); 
+			$options['allocationPools'] = $allocationPools; 
 		}
-		if (isset($this->app->getPostParam("hostRoutes")))
+		if (isset($hostRoutes))
 		{
-			$options['hostRoutes'] = $this->app->getPostParam("hostRoutes"); 
+			$options['hostRoutes'] = $hostRoutes; 
 		}
-		if (isset($this->app->getPostParam("enableDhcp")))
+		if (isset($enableDhcp))
 		{
-			$options['enableDhcp'] = $this->app->getPostParam("enableDhcp"); 
+			$options['enableDhcp'] = $enableDhcp; 
 		}
-		if (isset($this->app->getPostParam("tenantId")))
+		if (isset($tenantId))
 		{
-			$options['tenantId'] = $this->app->getPostParam("tenantId"); 
+			$options['tenantId'] = $tenantId; 
 		}
 		
 		try
@@ -339,10 +354,10 @@ class network{
 		$network="";
 		
 		try
-		{	$newtork = $this->libClass->getNetwork($this->app->getPostParam("networkId"));
-			$network->retrieve();
-
-			
+		{	
+			$networkId = $this->app->getPostParam("networkId");
+			$newtork = $this->libClass->getNetworkP($networkId);
+			$network->retrieve();			
 		}
 
 		
@@ -371,7 +386,7 @@ class network{
 	* @param String netId ID of network which we want to get
 	* @return Network
 	*/
-	private function getNetwork($netId)
+	private function getNetworkP($netId)
 	{
 		$network="";
 		
@@ -413,10 +428,10 @@ class network{
 		$sbnet="";
 		
 		try
-		{	$subnet = $this->libClass->getSubnet($this->app->getPostParam("subnetId"));
+		{	
+			$subnetId = $this->app->getPostParam("subnetId");
+			$subnet = $this->libClass->getSubnet($subnetId);
 			$subnet->retrieve();
-
-			
 		}
 
 		catch(BadResponseError $e)
@@ -443,7 +458,7 @@ class network{
 	* @param String subnetId ID of subnet which we want to get
 	* @return subnet
 	*/
-	private function getSubnet($subnetId)
+	private function getSubnetP($subnetId)
 	{
 		$subnet="";
 		
@@ -489,21 +504,26 @@ class network{
         private function updateNetwork()
      	{	
 		$options = array();
-		if(isset($this->app->getPostParam("name")))
+		$name = $this->app->getPostParam("name");
+		$shared = $this->app->getPostParam("shared");
+		$adminStateUp = $this->app->getPostParam("adminStateUp");
+
+		if(isset($name))
 		{
-			$options['name'] = $this->app->getPostParam("name");	
+			$options['name'] = $name;	
 		}
-		if(isset($this->app->getPostParam("shared")))
+		if(isset($shared))
 		{
-			$options['shared'] = $this->app->getPostParam("shared");	
+			$options['shared'] = $shared;	
 		}
-		if(isset($this->app->getPostParam("adminStateUp")))
+		if(isset($adminStateUp))
 		{
-			$options['adminStateUp'] = $this->app->getPostParam("adminStateUp");	
+			$options['adminStateUp'] = $adminStateUp;	
 		}
 		try
 		{		
-			$network = getNetwork($this->app->getPostParam("networkId"));
+			$networkId = $this->app->getPostParam("networkId");
+			$network = getNetworkP($networkId);
 		
 			$network->update($options);
 		}
@@ -547,26 +567,30 @@ class network{
 	private function updateSubnet()
      	{	
 		$options = array();
-		if(isset($this->app->getPostParam("name")))
+		$name = $this->app->getPostParam("name");
+		$networkId = $this->app->getPostParam("networkId");
+		$ipVersion = $this->app->getPostParam("ipVersion");
+		$cidr = $this->app->getPostParam("cidr");
+		if(isset($name))
 		{
-			$options['name'] = $this->app->getPostParam("name");	
+			$options['name'] = $name;	
 		}
-		if(isset($this->app->getPostParam("networkId")))
+		if(isset($networkId))
 		{
-			$options['networkId'] = $this->app->getPostParam("networkId");	
+			$options['networkId'] = $networkId;	
 		}
-		if(isset($this->app->getPostParam("ipVersion")))
+		if(isset($ipVersion))
 		{
-			$options['ipVersion'] = $this->app->getPostParam("ipVersion");	
+			$options['ipVersion'] = $ipVersion;	
 		}
-		if(isset($this->app->getPostParam("cidr")))
+		if(isset($cidr))
 		{
-			$options['cidr'] = $this->app->getPostParam("cidr");	
+			$options['cidr'] = $cidr;	
 		}
 		try
 		{
-			$subnet = getSubnet($this->app->getPostParam("networkId"));
-		
+			$networkId = $this->app->getPostParam("networkId");
+			$subnet = getSubnetP($networkId);
 			$subnet->update($options);
 		}
 		catch(BadResponseError $e)
@@ -599,8 +623,8 @@ class network{
      	{
 		try
 		{
-				
-			$network = getNetwork($this->app->getPostParam("networkId"));
+			$networkId = $this->app->getPostParam("networkId");
+			$network = getNetworkP($networkId);
 			$network->delete();
 		}
 		catch(BadResponseError $e)
@@ -633,7 +657,8 @@ class network{
      	{
 		try
 		{		
-			$subnet = getNetwork($this->app->getPostParam("subnetId"));
+			$subnetId = $this->app->getPostParam("subnetId");
+			$subnet = getNetworkP($subnetId);
 			$subnet->delete();
 		}
 		catch(BadResponseError $e)
@@ -673,41 +698,51 @@ class network{
 	private function createPort()
 	{
 		$options = array();
-		if (isset($this->app->getPostParam("networkId")))
+		$networkId = $this->app->getPostParam("networkId");
+		$name = $this->app->getPostParam("name");
+		$adminStateUp = $this->app->getPostParam("adminStateUp");
+		$macAddress = $this->app->getPostParam("macAddress");
+		$fixedIps = $this->app->getPostParam("fixedIps");
+		$deviceId = $this->app->getPostParam("deviceId");
+		$deviceOwner = $this->app->getPostParam("deviceOwner");
+		$securityGroups = $this->app->getPostParam("securityGroups");
+		$tenantId = $this->app->getPostParam("tenantId");
+
+		if (isset($networkId))
 		{
-			$options['networkId'] = $this->app->getPostParam("networkId"); 
+			$options['networkId'] = $networkId; 
 		}
-		if (isset($this->app->getPostParam("name")))
+		if (isset($name))
 		{
-			$options['name'] = $this->app->getPostParam("name"); 
+			$options['name'] = $name; 
 		}
-		if (isset($this->app->getPostParam("adminStateUp")))
+		if (isset($adminStateUp))
 		{
-			$options['adminStateUp'] = $this->app->getPostParam("adminStateUp"); 
+			$options['adminStateUp'] = $adminStateUp; 
 		}
-		if (isset($this->app->getPostParam("macAddress")))
+		if (isset($macAddress))
 		{
-			$options['macAddress'] = $this->app->getPostParam("macAddress"); 
+			$options['macAddress'] = $macAddress; 
 		}
-		if (isset($this->app->getPostParam("fixedIps")))
+		if (isset($fixedIps))
 		{
-			$options['fixedIps'] = $this->app->getPostParam("fixedIps"); 
+			$options['fixedIps'] = $fixedIps; 
 		}
-		if (isset($this->app->getPostParam("deviceId")))
+		if (isset($deviceId))
 		{
-			$options['deviceId'] = $this->app->getPostParam("deviceId"); 
+			$options['deviceId'] = $deviceId; 
 		}
-		if (isset($this->app->getPostParam("deviceOwner")))
+		if (isset($deviceOwner))
 		{
-			$options['deviceOwner'] = $this->app->getPostParam("deviceOwner"); 
+			$options['deviceOwner'] = $deviceOwner; 
 		}
-		if (isset($this->app->getPostParam("securityGroups")))
+		if (isset($securityGroups))
 		{
-			$options['securityGroups'] = $this->app->getPostParam("securityGroups"); 
+			$options['securityGroups'] = $securityGroups; 
 		}
-		if (isset($this->app->getPostParam("tenantId")))
+		if (isset($tenantId))
 		{
-			$options['tenantId'] = $this->app->getPostParam("tenantId"); 
+			$options['tenantId'] = $tenantId; 
 		}
 		try
 		{
@@ -771,7 +806,8 @@ class network{
 	{
 		try
 		{
-			$port = $this->libClass->getport($this->app->getPostParam("portId"));
+			$portId = $this->app->getPostParam("portId");
+			$port = $this->libClass->getport($portId);
 			$this->app->setOutput("Port", $port);
 		}
 		catch(BadResponseError $e)
@@ -800,7 +836,7 @@ class network{
 	* @return port
 	*/
 
-	private function getPort($portId)
+	private function getPortP($portId)
 	{
 		try
 		{
@@ -845,46 +881,55 @@ class network{
 	private function updatePort()
 	{
 		$options = array();
-		
-		if (isset($this->app->getPostParam("networkId")))
+		$networkId = $this->app->getPostParam("networkId");
+		$name = $this->app->getPostParam("name");
+		$adminStateUp = $this->app->getPostParam("adminStateUp");
+		$macAddress = $this->app->getPostParam("macAddress");
+		$fixedIps = $this->app->getPostParam("fixedIps");
+		$deviceId = $this->app->getPostParam("deviceId");
+		$deviceOwner = $this->app->getPostParam("deviceOwner");
+		$securityGroups = $this->app->getPostParam("securityGroups");
+		$tenantId = $this->app->getPostParam("tenantId");
+
+		if (isset($networkId))
 		{
-			$options['networkId'] = $this->app->getPostParam("networkId"); 
+			$options['networkId'] = $networkId; 
 		}
-		if (isset($this->app->getPostParam("name")))
+		if (isset($name))
 		{
-			$options['name'] =$this->app->getPostParam("name"); 
+			$options['name'] = $name; 
 		}
-		if (isset($this->app->getPostParam("adminStateUp")))
+		if (isset($adminStateUp))
 		{
-			$options['adminStateUp'] =$this->app->getPostParam("adminStateUp"); 
+			$options['adminStateUp'] = $adminStateUp; 
 		}
-		if (isset($this->app->getPostParam("macAddress")))
+		if (isset($macAddress))
 		{
-			$options['macAddress'] = $this->app->getPostParam("macAddress"); 
+			$options['macAddress'] = $macAddress; 
 		}
-		if (isset($this->app->getPostParam("fixedIps")))
+		if (isset($fixedIps))
 		{
-			$options['fixedIps'] = $this->app->getPostParam("fixedIps"); 
+			$options['fixedIps'] = $fixedIps; 
 		}
-		if (isset($this->app->getPostParam("deviceId")))
+		if (isset($deviceId))
 		{
-			$options['deviceId'] = $this->app->getPostParam("deviceId"); 
+			$options['deviceId'] = $deviceId; 
 		}
-		if (isset($this->app->getPostParam("deviceOwner")))
+		if (isset($deviceOwner))
 		{
-			$options['deviceOwner'] = $this->app->getPostParam("deviceOwner"); 
+			$options['deviceOwner'] = $deviceOwner; 
 		}
-		if (isset($this->app->getPostParam("networkId")))
+		if (isset($securityGroups))
 		{
-			$options['securityGroups'] = $this->app->getPostParam("securityGroups"); 
+			$options['securityGroups'] = $securityGroups; 
 		}
-		if (isset($this->app->getPostParam("tenantId")))
+		if (isset($tenantId))
 		{
-			$options['tenantId'] = $this->app->getPostParam("tenantId"); 
+			$options['tenantId'] = $tenantId; 
 		}
 		try
 		{
-			$port = getPort($this->app->getPostParam("networkId"));
+			$port = getPortP($networkId);
 			$port->update($options);
 		}
 		catch(BadResponseError $e)
@@ -908,7 +953,6 @@ class network{
 	* Delete a port given
 	*
 	* @param String portId 	id of port which we wante to delete
-	
 	* @return void
 	*/
 	private function deletePort()
@@ -916,7 +960,8 @@ class network{
 		
 		try
 		{
-			$port = getPort($this->app->getPostParam("portId"));
+			$portId = $this->app->getPostParam("portId");
+			$port = getPortP($portId);
 			$port->delete();
 		}
 		catch(BadResponseError $e)
@@ -949,13 +994,16 @@ class network{
 	private function createSecurityGroup()
 	{
 		$options = array();
-		if (isset($this->app->getPostParam("name")))
+		$name = $this->app->getPostParam("name");
+		$description = $this->app->getPostParam("description");
+
+		if (isset($name))
 		{
-			$options['name'] = $this->app->getPostParam("name"); 
+			$options['name'] = $name; 
 		}
-		if (isset($this->app->getPostParam("description")))
+		if (isset($description))
 		{
-			$options['description'] = $this->app->getPostParam("description"); 
+			$options['description'] = $description; 
 		}
 		try
 		{
@@ -997,37 +1045,46 @@ class network{
 	private function createSecurityGroupRule()
 	{
 		$options = array();
-		if (isset($this->app->getPostParam("securityGroupId")))
+		$securityGroupId = $this->app->getPostParam("securityGroupId");
+		$direction = $this->app->getPostParam("direction");
+		$ethertype = $this->app->getPostParam("ethertype");
+		$portRangeMin = $this->app->getPostParam("portRangeMin");
+		$portRangeMax = $this->app->getPostParam("portRangeMax");
+		$protocol = $this->app->getPostParam("protocol");
+		$remoteGroupId = $this->app->getPostParam("remoteGroupId");
+		$remoteIpPrefix = $this->app->getPostParam("remoteIpPrefix");
+
+		if (isset($securityGroupId))
 		{
-			$options['securityGroupId'] = $this->app->getPostParam("securityGroupId"); 
+			$options['securityGroupId'] = $securityGroupId; 
 		}
-		if (isset($this->app->getPostParam("direction")))
+		if (isset($direction))
 		{
-			$options['direction'] = $this->app->getPostParam("direction"); 
+			$options['direction'] = $direction; 
 		}
-		if (isset($this->app->getPostParam("ethertype")))
+		if (isset($ethertype))
 		{
-			$options['ethertype'] = $this->app->getPostParam("ethertype"); 
+			$options['ethertype'] = $ethertype; 
 		}
-		if (isset($this->app->getPostParam("portRangeMin")))
+		if (isset($portRangeMin))
 		{
-			$options['portRangeMin'] = $this->app->getPostParam("portRangeMin"); 
+			$options['portRangeMin'] = $portRangeMin; 
 		}
-		if (isset($this->app->getPostParam("portRangeMax")))
+		if (isset($portRangeMax))
 		{
-			$options['portRangeMax'] = $this->app->getPostParam("portRangeMax"); 
+			$options['portRangeMax'] = $portRangeMax; 
 		}
-		if (isset($this->app->getPostParam("protocol")))
+		if (isset($protocol))
 		{
-			$options['protocol'] = $this->app->getPostParam("protocol"); 
+			$options['protocol'] = $protocol; 
 		}
-		if (isset($this->app->getPostParam("remoteGroupId")))
+		if (isset($remoteGroupId))
 		{
-			$options['remoteGroupId'] = $this->app->getPostParam("remoteGroupId"); 
+			$options['remoteGroupId'] = $remoteGroupId; 
 		}
-		if (isset($this->app->getPostParam("remoteIpPrefix")))
+		if (isset($remoteIpPrefix))
 		{
-			$options['remoteIpPrefix'] = $this->app->getPostParam("remoteIpPrefix"); 
+			$options['remoteIpPrefix'] = $remoteIpPrefix; 
 		}
 		try
 		{
@@ -1125,7 +1182,8 @@ class network{
 	{
 		try
 		{
-			$securityGroupe = $this->libClass->getSecurityGroupe($this->app->getPostParam("securityGroupeId"));
+			$securityGroupId = $this->app->getPostParam("securityGroupeId");
+			$securityGroupe = $this->libClass->getSecurityGroupe($securityGroupId);
 			$this->app->setOutput("securityGroupe", $securityGroupe);
 		}
 		catch(BadResponseError $e)
@@ -1153,7 +1211,7 @@ class network{
 	* @param securityGroupeId ID of security Groupe which we want to get
 	* @return securityGroupe
 	*/
-	private function getSecurityGroupe($securityGroupeId)
+	private function getSecurityGroupeP($securityGroupeId)
 	{
 		try
 		{
@@ -1187,8 +1245,8 @@ class network{
     {	
 		try
 		{
-		
-			$securityGroupe = getSecurityGroupe($this->app->getPostParam("securityGroupeId"));
+			$securityGroupId = $this->app->getPostParam("securityGroupeId");
+			$securityGroupe = getSecurityGroupeP($securityGroupId);
 			$securityGroupe->delete();
 		}
 		catch(BadResponseError $e)