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POMark multiple locations in Google Maps
 

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    <p>I am trying to mark several locations on maps which I am fetching from Database through a php code :</p> <p><strong>PHP Code:</strong></p> <pre><code>&lt;?php error_reporting(0); $con = mysql_connect('localhost','root',''); $db = mysql_select_db('easydoes'); $query = mysql_query('SELECT city,latitude,longitude FROM zip_codes LIMIT 0 , 30'); while($row = mysql_fetch_assoc($query)) { $val[]=$row; } echo json_encode($val); ?&gt; </code></pre> <p><strong>HTML Code</strong></p> <pre><code>&lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt; &lt;meta name="viewport" content="initial-scale=1.0, user-scalable=no"&gt; &lt;meta charset="utf-8"&gt; &lt;title&gt;Simple markers&lt;/title&gt; &lt;style&gt; html, body, #map-canvas { height: 100%; margin: 0px; padding: 0px } &lt;/style&gt; &lt;script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"&gt; &lt;/script&gt; &lt;script&gt; var obj; $(document).ready(function(){ $.post("markers.php",{},function(data){ obj=JSON.parse(data); //alert(obj[0].city); initialize(obj); }); }); &lt;/script&gt; &lt;script src="https://maps.googleapis.com/maps/api/js?v=3.exp&amp;sensor=false"&gt;&lt;/script&gt; &lt;script src="http://google-maps-utility-library-v3.googlecode.com/svn/tags/markerclusterer/1.0/src/markerclusterer.js"&gt; &lt;/script&gt; &lt;script&gt; function initialize() { var markers = []; for(var i=0;i&lt;obj.length;i++) { var myLatlng = new google.maps.LatLng( obj[i].latitude, obj[i].longitude); var mapOptions = { zoom: 4, center: myLatlng } var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions); var marker = new google.maps.Marker({ position: myLatlng, map: map, title: obj[i].city }); markers.push(marker); } markerClusterer = new MarkerClusterer(map, markers, { maxZoom: 12, gridSize: 40, styles: "Default" }); } google.maps.event.addDomListener(window, 'load', initialize); &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;div id="map-canvas"&gt;&lt;/div&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>Where am I going wrong ? I am pretty new to Jquery and Java Script .</p>
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