$_SESSION not passing to javascript

Question

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

Check your window.onload function. – wildandjam Jul 08 '14 at 15:03 — wildandjam, Jul 08 '14 at 15:03

score 0 · Answer 1 · answered Jul 08 '14 at 15:03

0

Fix you code:

window.onload=function(){("createmap(<?php echo $_SESSION['MARKETLOCATION'] ?>");};

answered Jul 08 '14 at 15:03

gpupo

942
9
16

Please explain to the OP what they did wrong and how your code will fix the issue. This will help their understanding. – Vulcronos Jul 08 '14 at 15:25

score 0 · Accepted Answer · answered Jul 08 '14 at 15:10

0

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); };

answered Jul 08 '14 at 15:10

jeroen

91,079
21
114
132

tried this and it showing the correct array information however it does not seem to parse correctly once in the function create map... here the output when I changed it to your suggestion – Jan Jul 08 '14 at 15:18
@Jan You need to do a `console.log(LatLong);` in your function. You will probably find it is not an array but an object with 2 properties. – jeroen Jul 08 '14 at 15:20
1

Thanks jeroen you were correct session_variable was indeed an object (with 2 arrays in it session_variable Object {LAT: Array[19], LONG: Array[19]} ) as this were the lat long for the markers on the map I just reference them from the param passed to the function. in my code (ie position: new google.maps.LatLng(session_variable.LAT[i],session_variable.LONG[i])) thanks again consider this solved – Jan Jul 09 '14 at 02:46

$_SESSION not passing to javascript

2 Answers2