$_SESSION not passing to javascript

This is probably a simple issue but I would appreciate any help
I have loaded a $_SESSION variable from my MVC model , its a multidimensional area of latitude and longitude points in a map. here where I loaded this from

         for($i=0; $i<count($markets['results']); $i++) {
        .
        .
     $marketinfo["lat"][$i] = floatval($lat);
             $marketinfo["long"][$i] = floatval($lon);
             };
          $_SESSION['MARKETLOCATION']['LAT'] = $marketinfo["lat"];
          $_SESSION['MARKETLOCATION']['LONG'] = $marketinfo["long"];

Then down in the view section I am calling a _template for header with this code

<script type="text/javascript"> 
            function createmap(LatLong) {
            var firstpass = true;
            for (var i = 0; i < $LatLong.length; i++) {
                   var  lat = $LatLong['LAT'][i];
                   var  lng = $LatLong['LONG'][i];
                    if (firstpass === true){
                            var map = new google.maps.Map(document.getElementById('map-canvas'),{
                                zoom: 10,
                                center: new google.maps.LatLng($lat[0]+','+$lng[0]),
                                mapTypeId: google.maps.MapTypeId.ROADMAP
                            });
                            firstpass = false;
                    }
                    var infowindow = new google.maps.InfoWindow();
                    marker = new google.maps.Marker({
                        position: new google.maps.LatLng($lat[i]+','+$lng[i]),
                        map: map
                    });

                    }
            window.onload=function(){("createmap($_SESSION['MARKETLOCATION']");};
            }
        </script>
    </head>
    <body>
        <div class='Mapbox' id = 'map-canvas' ></div>

Problem is the map is not displaying at all. I know that my API key is correct because I tested it before I created this code. So I think it probibaly has to do with Passing the session variable Again any insight would be appreciated

Solution

Javascript and php are two different languages. You need to output your variable from php but you cannot just echo it as $_SESSION['MARKETLOCATION'] is an array.

You should do something like:

var session_variable = <?php echo json_encode($_SESSION['MARKETLOCATION']); ?>;
// now you might have to do some processing on session_variable like parsing it...
// for an example:
var session_object = JSON.parse(session_variable);
window.onload=function(){ createmap(session_object); };