Escape GET variables centrally
Escape GET variables centrally

--- a/include/common-template.inc.php
+++ b/include/common-template.inc.php
@@ -182,7 +182,7 @@
 	if ($opendiv) {
 		echo '<div data-role="page"> 
 	<div data-role="header" data-position="inline">
-	<a href="' . $_SERVER["HTTP_REFERER"] . '" data-icon="arrow-l" data-rel="back" class="ui-btn-left">Back</a> 
+	<a href="' . (isset($_SERVER["HTTP_REFERER"]) ? $_SERVER["HTTP_REFERER"] : "javascript:history.go(-1)") . '" data-icon="arrow-l" data-rel="back" class="ui-btn-left">Back</a> 
 		<h1>' . $pageTitle . '</h1>
 		<a href="/index.php" data-icon="home" class="ui-btn-right">Home</a>
 	</div><!-- /header -->

--- a/include/common.inc.php
+++ b/include/common.inc.php
@@ -6,7 +6,7 @@
 	"phperror",
 	"awsotp",
 	//"squallotp",
-	//"vanilleotp",
+	"vanilleotp",
 	"database",
 	"other"
 );
@@ -33,6 +33,7 @@
 include_once ("common-session.inc.php");
 include_once ("common-db.inc.php");
 include_once ("common-template.inc.php");
+include_once ("common-request.inc.php");
 
 function isDebugServer()
 {

file:a/index.php -> file:b/index.php
--- a/index.php
+++ b/index.php
@@ -13,14 +13,14 @@
                 <li data-role="list-divider">Timetables - Stops</li>
                 <li><a href="stopList.php">Major (Timing Point) Stops</a></li>
 		<li><a href="stopList.php?allstops=yes">All Stops</a></li>
-		<li><a href="stopList.php?suburbs=yes">Stops By Suburb</a></li>
+		<li><a href="stopList.php?bysuburbs=yes">Stops By Suburb</a></li>
 		<li><a class="nearby" href="stopList.php?nearby=yes">Nearby Stops</a></li>
             </ul>
 	    <ul data-role="listview" data-inset="true" data-theme="c" data-dividertheme="b">
                 <li data-role="list-divider">Timetables - Routes</li>
                 <li><a href="routeList.php">Routes By Final Destination</a></li>
 		<li><a href="routeList.php?bynumber=yes">Routes By Number</a></li>
-		<li><a href="routeList.php?bysuburb=yes">Routes By Suburb</a></li>
+		<li><a href="routeList.php?bysuburbs=yes">Routes By Suburb</a></li>
 		<li><a class="nearby" href="routeList.php?nearby=yes">Nearby Routes</a></li>
             </ul>
 <?php

--- a/labs/networkstats.php
+++ b/labs/networkstats.php
@@ -31,7 +31,6 @@
 <?php
 // middle of graph = 6am
 $adjustFactor = 0;
-$routeid = ($_REQUEST['routeid'] ? filter_var($_REQUEST['routeid'], FILTER_SANITIZE_NUMBER_INT) : 0);
 $route = getRoute($routeid);
 echo "<h1>{$route['route_short_name']} {$route['route_long_name']}</h1>";
 foreach (getRouteTrips($routeid) as $key => $trip) {

--- a/labs/tripPlannerTester.kml.php
+++ b/labs/tripPlannerTester.kml.php
@@ -49,7 +49,7 @@
 			"latdeltasize" => $latdeltasize,
 			"londeltasize" => $londeltasize,
 			"regionname" => $md['key'],
-			"plan" => $plan . "<br/><a href='" . htmlspecialchars($url) . "'>original plan</a>"
+			"plan" => $plan . '<br/><a href="' . htmlspecialchars($md['url']) . '">original plan</a>'
 		);
 		$regionTimes[] = $time;
 	}
@@ -137,8 +137,8 @@
 		"finishlon" => 149.1243,
 	)
 );
-$latdeltasize = 0.025;
-$londeltasize = 0.025;
+$latdeltasize = 0.005;
+$londeltasize = 0.005;
 $from = "Wattle Street";
 $fromPlace = (startsWith($from, "-") ? $from : geocode($from, false));
 $startTime = "9:00 am";
@@ -147,6 +147,7 @@
 $regionTimes = Array();
 $testRegions = Array();
 $useragent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1";
+if ($kml) echo "<name> $from at $startTime on $startDate </name>";
 if ($csv) echo "<pre>";
 if ($csv) echo "lat,lon,time,latdeltasize, londeltasize, region key name\n";
 $rc = new RollingCurl("processResult_cb");
@@ -155,11 +156,12 @@
 	for ($i = $boundingBox['startlat']; $i >= $boundingBox['finishlat']; $i-= $latdeltasize) {
 		for ($j = $boundingBox['startlon']; $j <= $boundingBox['finishlon']; $j+= $londeltasize) {
 			$url = $otpAPIurl . "ws/plan?date=" . urlencode($startDate) . "&time=" . urlencode($startTime) . "&mode=TRANSIT%2CWALK&optimize=QUICK&maxWalkDistance=440&wheelchair=false&toPlace=" . $i . "," . $j . "&fromPlace=$fromPlace";
+			//debug($url);
 			$request = new RollingCurlRequest($url);
 			$request->headers = Array(
 				"Accept: application/json"
 			);
-			$request->metadata = Array( "i" => $i, "j" => $j, "key" => $key);
+			$request->metadata = Array( "i" => $i, "j" => $j, "key" => $key, "url" => $url);
 			$rc->add($request);
 		}
 	}
@@ -171,15 +173,14 @@
 	//$maxTime = max($regionTimes);
 	//$rangeTime = $maxTime - $minTime;
 	//$deltaTime = $rangeTime / $colorSteps;
-//	$Gradients = Gradient(strrev("66FF00") , strrev("FF0000") , $colorSteps); // KML is BGR not RGB so strrev
-	$Gradients = Gradient("66FF00" , "FF0000" , $colorSteps); // KML is BGR not RGB so strrev
+	$Gradients = Gradient(strrev("66FF00") , strrev("FF0000") , $colorSteps); // KML is BGR not RGB so strrev
 	foreach ($testRegions as $testRegion) {
 		//$band = (floor(($testRegion[time] - $minTime) / $deltaTime));
 		$band = (floor($testRegion[time] / 10));
 		if ($band > $colorSteps) $band = $colorSteps;
 		echo "<Placemark>
   <name>" . $testRegion['regionname'] . " time {$testRegion['time']} band $band</name>
-  <description> {$testRegion['plan']} </description>
+  <description> <![CDATA[ {$testRegion['plan']}  ]]> </description>
     <Style>
         <PolyStyle>
             <color>c7" . $Gradients[$band] . "</color>" . // 7f = 50% alpha, c7=78%

--- a/labs/tripPlannerTester.php
+++ b/labs/tripPlannerTester.php
@@ -3,7 +3,9 @@
     <script src="openlayers/OpenLayers.js"></script>
  <SCRIPT TYPE="text/javascript" SRC="OpenStreetMap.js"></SCRIPT> 
     <script type="text/javascript">
-
+        var map,select;
+       
+	
 function init()
 {
     var extent = new OpenLayers.Bounds(148.98, -35.48, 149.25, -35.15);
@@ -16,13 +18,13 @@
 		}; 
  
 		// create the ol map object
-		var map = new OpenLayers.Map('map', options);
+		map = new OpenLayers.Map('map', options);
     
 var osmtiles = new OpenLayers.Layer.OSM("OSM");
 
 var nearmap = new OpenLayers.Layer.OSM.NearMap("NearMap");
 
-    var tripplantest = new OpenLayers.Layer.GML("tripplantest", "tripPlannerTester.kml.php", {
+    var tripplantest = new OpenLayers.Layer.GML("tripplantest", "tripPlannerTester.kml", {
         format: OpenLayers.Format.KML,
         formatOptions: {
             extractStyles: true,
@@ -44,9 +46,45 @@
     {
         displayProjection: new OpenLayers.Projection("EPSG:900913")
     }));
+    
+  select = new OpenLayers.Control.SelectFeature(tripplantest);
+            
+            tripplantest.events.on({
+                "featureselected": onFeatureSelect,
+                "featureunselected": onFeatureUnselect
+            });
+ 
+            map.addControl(select);
+            select.activate();   
 
 }
- 
+ function onPopupClose(evt) {
+            select.unselectAll();
+        }
+        function onFeatureSelect(event) {
+            var feature = event.feature;
+            // Since KML is user-generated, do naive protection against
+            // Javascript.
+            var content = "<h2>"+feature.attributes.name + "</h2>" + feature.attributes.description;
+            if (content.search("<script") != -1) {
+                content = "Content contained Javascript! Escaped content below.<br />" + content.replace(/</g, "&lt;");
+            }
+            popup = new OpenLayers.Popup.FramedCloud("chicken", 
+                                     feature.geometry.getBounds().getCenterLonLat(),
+                                     new OpenLayers.Size(100,100),
+                                     content,
+                                     null, true, onPopupClose);
+            feature.popup = popup;
+            map.addPopup(popup);
+        }
+        function onFeatureUnselect(event) {
+            var feature = event.feature;
+            if(feature.popup) {
+                map.removePopup(feature.popup);
+                feature.popup.destroy();
+                delete feature.popup;
+            }
+        }
     </script>
 
   </head>

--- a/layar_api.php
+++ b/layar_api.php
@@ -5,11 +5,8 @@
 $output['layer'] = "canberrabusstops";
 $max_page = 10;
 $max_results = 50;
-$page_start = 0 + filter_var($_REQUEST['pageKey'], FILTER_SANITIZE_NUMBER_INT);
-$page_end = $max_page + filter_var($_REQUEST['pageKey'], FILTER_SANITIZE_NUMBER_INT);
-$lat = filter_var($_REQUEST['lat'], FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION);
-$lon = filter_var($_REQUEST['lon'], FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION);
-$max_distance = filter_var($_REQUEST['radius'], FILTER_SANITIZE_NUMBER_INT);
+$page_start = 0 + $pageKey;
+$page_end = $max_page + $pageKey;
 $contents = getNearbyStops($lat, $lon, 50, $max_distance);
 $stopNum = 0;
 foreach ($contents as $stop) {

--- a/routeList.php
+++ b/routeList.php
@@ -7,72 +7,70 @@
 			<ul> 
 				<li><a href="routeList.php">By Final Destination...</a></li> 
 				<li><a href="routeList.php?bynumber=yes">By Number... </a></li>
-				<li><a href="routeList.php?bysuburb=yes">By Suburb... </a></li>
+				<li><a href="routeList.php?bysuburbs=yes">By Suburb... </a></li>
 				<li><a href="routeList.php?nearby=yes">Nearby... </a></li>
 			</ul>
                 </div>
 	';
 }
-if ($_REQUEST['bysuburb']) {
+if (isset($bysuburbs)) {
 	include_header("Routes by Suburb", "routeList");
 	navbar();
 	echo '  <ul data-role="listview" data-filter="true" data-inset="true" >';
-	if (!isset($_REQUEST['firstLetter'])) {
+	if (!isset($firstLetter)) {
 		foreach (range('A', 'Z') as $letter) {
-			echo "<li><a href=\"routeList.php?firstLetter=$letter&amp;bysuburb=yes\">$letter...</a></li>\n";
+			echo "<li><a href=\"routeList.php?firstLetter=$letter&amp;bysuburbs=yes\">$letter...</a></li>\n";
 		}
 	}
 	else {
 		foreach ($suburbs as $suburb) {
-			if (startsWith($suburb, $_REQUEST['firstLetter'])) {
+			if (startsWith($suburb, $firstLetter)) {
 				echo '<li><a href="routeList.php?suburb=' . urlencode($suburb) . '">' . $suburb . '</a></li>';
 			}
 		}
 	}
 	echo '</ul>';
 }
-else if ($_REQUEST['nearby'] || $_REQUEST['suburb']) {
+else if (isset($nearby) || isset($suburb)) {
 	$routes = Array();
-	if ($_REQUEST['suburb']) {
-		$suburb = filter_var($_REQUEST['suburb'], FILTER_SANITIZE_STRING);
-		include_header($suburb ." - ".ucwords(service_period()), "routeList");
-					navbar();
-					timePlaceSettings();
-				trackEvent("Route Lists", "Routes By Suburb", $suburb);
-		$routes = getRoutesBySuburb($suburb);
-		
+	if ($suburb) {
+		include_header($suburb . " - " . ucwords(service_period()) , "routeList");
+		navbar();
+		timePlaceSettings();
+		trackEvent("Route Lists", "Routes By Suburb", $suburb);
+		$routes = getRoutesbysuburbs($suburb);
 	}
-	if ($_REQUEST['nearby']) {
+	if (isset($nearby)) {
 		include_header("Routes Nearby", "routeList", true, true);
-		trackEvent("Route Lists", "Routes Nearby", $_SESSION['lat'].",".$_SESSION['lon']);
-			navbar();
-			timePlaceSettings(true);
+		trackEvent("Route Lists", "Routes Nearby", $_SESSION['lat'] . "," . $_SESSION['lon']);
+		navbar();
+		timePlaceSettings(true);
 		if (!isset($_SESSION['lat']) || !isset($_SESSION['lat']) || $_SESSION['lat'] == "" || $_SESSION['lon'] == "") {
 			include_footer();
 			die();
 		}
-		$routes = getRoutesNearby($_SESSION['lat'],$_SESSION['lon']);
+		$routes = getRoutesNearby($_SESSION['lat'], $_SESSION['lon']);
 	}
-
 	echo '  <ul data-role="listview" data-filter="true" data-inset="true" >';
- if ($routes) {
-	foreach ($routes as $route) {
-		echo '<li><a href="trip.php?routeid=' . $route['route_id'] . '"><h3>' . $route['route_short_name'] . "</h3><p>" . $route['route_long_name'] . " (" . ucwords($route['service_id']) . ")</p>";
-		if ($_REQUEST['nearby']) {
-			$time = getTimeInterpolatedRouteAtStop($route['route_id'], $route['stop_id']);
-				echo '<span class="ui-li-count">'.($time['arrival_time']?$time['arrival_time']:"No more trips today")."<br>" .floor($route['distance']) . 'm away</span>';
+	if ($routes) {
+		foreach ($routes as $route) {
+			echo '<li><a href="trip.php?routeid=' . $route['route_id'] . '"><h3>' . $route['route_short_name'] . "</h3><p>" . $route['route_long_name'] . " (" . ucwords($route['service_id']) . ")</p>";
+			if (isset($nearby)) {
+				$time = getTimeInterpolatedRouteAtStop($route['route_id'], $route['stop_id']);
+				echo '<span class="ui-li-count">' . ($time['arrival_time'] ? $time['arrival_time'] : "No more trips today") . "<br>" . floor($route['distance']) . 'm away</span>';
+			}
+			echo "</a></li>\n";
 		}
-		echo "</a></li>\n";
 	}
- } else {
-	echo "<li style='text-align: center;'> No routes nearby.</li>";
- }
+	else {
+		echo "<li style='text-align: center;'> No routes nearby.</li>";
+	}
 }
-else if ($_REQUEST['bynumber'] || $_REQUEST['numberSeries']) {
+else if (isset($bynumber) || isset($numberSeries)) {
 	include_header("Routes by Number", "routeList");
 	navbar();
 	echo ' <ul data-role="listview"  data-inset="true">';
-	if ($_REQUEST['bynumber']) {
+	if (isset($bynumber)) {
 		$routes = getRoutesByNumber();
 		$routeSeries = Array();
 		$seriesRange = Array();
@@ -101,8 +99,8 @@
 			echo "</a></li>\n";
 		}
 	}
-	else if ($_REQUEST['numberSeries']) {
-		$routes = getRoutesByNumber($_REQUEST['numberSeries']);
+	else if ($numberSeries) {
+		$routes = getRoutesByNumber($numberSeries);
 		foreach ($routes as $route) {
 			echo '<li> <a href="trip.php?routeid=' . $route['route_id'] . '"><h3>' . $route['route_short_name'] . "</h3><p>" . $route['route_long_name'] . " (" . ucwords($route['service_id']) . ")</p></a></li>\n";
 		}
@@ -112,8 +110,8 @@
 	include_header("Routes by Destination", "routeList");
 	navbar();
 	echo ' <ul data-role="listview"  data-inset="true">';
-	if ($_REQUEST['routeDestination']) {
-		foreach (getRoutesByDestination(urldecode($_REQUEST['routeDestination'])) as $route) {
+	if (isset($routeDestination)) {
+		foreach (getRoutesByDestination($routeDestination) as $route) {
 			echo '<li><a href="trip.php?routeid=' . $route["route_id"] . '"><h3>' . $route["route_short_name"] . '</h3><p>' . $route["route_long_name"] . " (" . ucwords($route['service_id']) . ")</p></a></li>\n";
 		}
 	}

file:a/stop.php -> file:b/stop.php
--- a/stop.php
+++ b/stop.php
@@ -1,7 +1,5 @@
 <?php
 include ('include/common.inc.php');
-$stopid = filter_var($_REQUEST['stopid'], FILTER_SANITIZE_NUMBER_INT);
-$stopcode = filter_var($_REQUEST['stopcode'], FILTER_SANITIZE_STRING);
 if ($stopid) $stop = getStop($stopid);
 /*if ($stopcode != "" && $stop[5] != $stopcode) {
 	$url = $APIurl . "/json/stopcodesearch?q=" . $stopcode;
@@ -21,8 +19,7 @@
 $allStopsTrips = Array();
 $fetchedTripSequences = Array();
 $stopLinks = "";
-if (isset($_REQUEST['stopids'])) {
-	$stopids = explode(",", filter_var($_REQUEST['stopids'], FILTER_SANITIZE_STRING));
+if (isset($stopids)) {
 	foreach ($stopids as $sub_stopid) {
 		$stops[] = getStop($sub_stopid);
 	}

--- a/stopList.php
+++ b/stopList.php
@@ -1,17 +1,13 @@
 <?php
 include ('include/common.inc.php');
 $stops = Array();
-function filterByFirstLetter($var)
-{
-	return $var[1][0] == $_REQUEST['firstLetter'];
-}
 function navbar()
 {
 	echo '
 		<div data-role="navbar">
 			<ul> 
 				<li><a href="stopList.php">Timing Points</a></li>
-				<li><a href="stopList.php?suburbs=yes">By Suburb</a></li>
+				<li><a href="stopList.php?bysuburbs=yes">By Suburb</a></li>
 				<li><a href="stopList.php?nearby=yes">Nearby Stops</a></li>
 				<li><a href="stopList.php?allstops=yes">All Stops</a></li> 
 			</ul>
@@ -19,18 +15,18 @@
 	';
 }
 // By suburb
-if (isset($_REQUEST['suburbs'])) {
+if (isset($bysuburbs)) {
 	include_header("Stops by Suburb", "stopList");
 	navbar();
 	echo '  <ul data-role="listview" data-filter="true" data-inset="true" >';
-	if (!isset($_REQUEST['firstLetter'])) {
+	if (!isset($firstLetter)) {
 		foreach (range('A', 'Z') as $letter) {
-			echo "<li><a href=\"stopList.php?firstLetter=$letter&amp;suburbs=yes\">$letter...</a></li>\n";
+			echo "<li><a href=\"stopList.php?firstLetter=$letter&amp;bysuburbs=yes\">$letter...</a></li>\n";
 		}
 	}
 	else {
 		foreach ($suburbs as $suburb) {
-			if (startsWith($suburb, $_REQUEST['firstLetter'])) {
+			if (startsWith($suburb, $firstLetter)) {
 				echo '<li><a href="stopList.php?suburb=' . urlencode($suburb) . '">' . $suburb . '</a></li>';
 			}
 		}
@@ -39,41 +35,39 @@
 }
 else {
 	// Timing Points / All stops
-	if ($_REQUEST['allstops']) {
+	if (isset($allstops)) {
 		$listType = 'allstops=yes';
 		$stops = getStops();
 		include_header("All Stops", "stopList");
 		navbar();
 		timePlaceSettings();
 	}
-	else if ($_REQUEST['nearby']) {
+	else if (isset($nearby)) {
 		$listType = 'nearby=yes';
 		include_header("Nearby Stops", "stopList", true, true);
-		trackEvent("Stop Lists","Stops Nearby", $_SESSION['lat'].",".$_SESSION['lon']);
+		trackEvent("Stop Lists", "Stops Nearby", $_SESSION['lat'] . "," . $_SESSION['lon']);
 		navbar();
 		timePlaceSettings(true);
 		if (!isset($_SESSION['lat']) || !isset($_SESSION['lat']) || $_SESSION['lat'] == "" || $_SESSION['lon'] == "") {
 			include_footer();
 			die();
 		}
-		
-		$stops = getNearbyStops($_SESSION['lat'],$_SESSION['lon'],15);
+		$stops = getNearbyStops($_SESSION['lat'], $_SESSION['lon'], 15);
 	}
-	else if ($_REQUEST['suburb']) {
-		$suburb = filter_var($_REQUEST['suburb'], FILTER_SANITIZE_STRING);
+	else if (isset($suburb)) {
 		$stops = getStopsBySuburb($suburb);
 		include_header("Stops in " . ucwords($suburb) , "stopList");
 		navbar();
-	       trackEvent("Stop Lists","Stops By Suburb", $suburb);
+		trackEvent("Stop Lists", "Stops By Suburb", $suburb);
 	}
 	else {
-		$stops = getStops(true,$_REQUEST['firstLetter']);
+		$stops = getStops(true, $firstLetter);
 		include_header("Timing Points / Major Stops", "stopList");
 		navbar();
 		timePlaceSettings();
 	}
 	echo '  <ul data-role="listview" data-filter="true" data-inset="true" >';
-	if (!isset($_REQUEST['firstLetter']) && !$_REQUEST['suburb'] && !$_REQUEST['nearby']) {
+	if (!isset($firstLetter) && !isset($suburb) && !isset($nearby)) {
 		foreach (range('A', 'Z') as $letter) {
 			echo "<li><a href=\"stopList.php?firstLetter=$letter&amp;$listType\">$letter...</a></li>\n";
 		}
@@ -91,11 +85,12 @@
 					if (!startsWith($stopsGrouped['stop_codes'][0], "Wj")) echo '<img src="css/images/time.png" alt="Timing Point: " class="ui-li-icon">';
 					echo '<a href="stop.php?stopids=' . implode(",", $stopsGrouped['stop_ids']) . '">';
 					if (isset($_SESSION['lat']) && isset($_SESSION['lon'])) {
-						echo '<span class="ui-li-count">' . distance($stop['stop_lat'],$stop['stop_lon'], $_SESSION['lat'], $_SESSION['lon'], true) . 'm away</span>';
+						echo '<span class="ui-li-count">' . distance($stop['stop_lat'], $stop['stop_lon'], $_SESSION['lat'], $_SESSION['lon'], true) . 'm away</span>';
 					}
 					echo bracketsMeanNewLine(trim(preg_replace("/\(Platform.*/", "", $stop['stop_name'])) . '(' . sizeof($stopsGrouped["stop_ids"]) . ' stops)');
 					echo "</a></li>\n";
-					flush(); @ob_flush();
+					flush();
+					@ob_flush();
 					$stopsGrouped = Array();
 				}
 				else {
@@ -104,11 +99,12 @@
 					if (!startsWith($stop['stop_code'], "Wj")) echo '<img src="css/images/time.png" alt="Timing Point" class="ui-li-icon">';
 					echo '<a href="stop.php?stopid=' . $stop['stop_id'] . (startsWith($stop['stop_code'], "Wj") ? '&amp;stopcode=' . $stop['stop_code'] : "") . '">';
 					if (isset($_SESSION['lat']) && isset($_SESSION['lon'])) {
-						echo '<span class="ui-li-count">' . distance($stop['stop_lat'],$stop['stop_lon'], $_SESSION['lat'], $_SESSION['lon'], true) . 'm away</span>';
+						echo '<span class="ui-li-count">' . distance($stop['stop_lat'], $stop['stop_lon'], $_SESSION['lat'], $_SESSION['lon'], true) . 'm away</span>';
 					}
 					echo bracketsMeanNewLine($stop['stop_name']);
 					echo "</a></li>\n";
-					flush(); @ob_flush();
+					flush();
+					@ob_flush();
 				}
 			}
 			else {

file:a/trip.php -> file:b/trip.php
--- a/trip.php
+++ b/trip.php
@@ -1,12 +1,9 @@
 <?php
 include ('include/common.inc.php');
-$tripid = filter_var($_REQUEST['tripid'], FILTER_SANITIZE_NUMBER_INT);
-$stopid = filter_var($_REQUEST['stopid'], FILTER_SANITIZE_NUMBER_INT);
-$routeid = filter_var($_REQUEST['routeid'], FILTER_SANITIZE_NUMBER_INT);
 
 $routetrips = Array();
 
-if ($_REQUEST['routeid'] && !$_REQUEST['tripid']) {
+if (isset($routeid) && !isset($tripid)) {
     $trip = getRouteNextTrip($routeid);
     $tripid = $trip['trip_id'];
 } else {