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Editorial Team
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Asked: 2026-05-27T10:54:57+00:00

I want to create a store locator with Google Maps. I have a database

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I want to create a store locator with Google Maps.

I have a database with a table of TOURISTIC OBJECTS (with their coordinates) and a table of HOTELS (also with their coordinates).

I want the user to have the possibility, after he loads the page of the Tower of London, let’s say, to see what hotels are near the object within a 10-kilometer radius and display the results on Google Maps with markers.

So far, I’ve only managed to fetch the hotels in a 10-kilometer range from the database with the haversin formula and display them as text:

$result = mysql_query("SELECT  nume,  poze, descriere, link, (
(
    ACOS( SIN( 45.515038 * PI( ) /180 ) * SIN( latitudine * PI( ) /180 ) +
          COS( 45.515038 * PI( ) /180 ) * COS( latitudine * PI( ) /180 ) *
          COS( ( 25.366935 - longitudine ) * PI( ) /180 )
    ) *180 / PI( )
) *60 * 1.1515 * 1.609344
) AS distance
FROM `unitati`
HAVING distance <= '10'
ORDER BY distance ASC
LIMIT 0 , 30");

How can I display them as markers on the map?

I found this and I thought it could help me: http://code.google.com/intl/ro-RO/apis/maps/articles/phpsqlsearch.html, but it has a different logic: the user types in the address.

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1 Answer

  1. Editorial Team

    This example takes your query (and you’ll need to edit the 45.515038 and 25.366935 with the lat/lng for each objective) and outputs it as a JS array of arrays (you could make it more formal JSON if you like)

    It then loops through that array, making markers for each and placing them on a map. Finally, it adds a click listener to each so that it’ll display relevant information. 

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<style>
#map_canvas{width:500px;height:500px;}
</style>
</head>

<body>
<div id="map_canvas"></div>
<script>
<?php
//you'll first need to connect to your db
//you also have to edit the lat/lng in your SELECT statement to be that of your objective
$result = mysql_query("SELECT  latitudine, longitudine, nume,  poze, descriere, link, (
(
    ACOS( SIN( 45.515038 * PI( ) /180 ) * SIN( latitudine * PI( ) /180 ) +
          COS( 45.515038 * PI( ) /180 ) * COS( latitudine * PI( ) /180 ) *
          COS( ( 25.366935 - longitudine ) * PI( ) /180 )
    ) *180 / PI( )
) *60 * 1.1515 * 1.609344
) AS distance
FROM `unitati`
HAVING distance <= '10'
ORDER BY distance ASC
LIMIT 0 , 30");
$c=0;
echo "var data=[";
while($markers=mysql_fetch_array($result)){
    if($c>0){echo ",";}
    echo "['".$markers[0]."','".$markers[1]."','".$markers[2]."','".$markers[3]."','".$markers[4]."','".$markers[5]."','".$markers[6]."'"."]";
    $c++;
}
echo "];";
?>
    //var data=[['45','-73','home','poz1','desc1','link1'],['43','-75','work','poz2','desc2','link2']];
    var places=new Array();
    var map;
    var MyInfoWindow = new google.maps.InfoWindow({content: 'Loading...'});
    var bounds = new google.maps.LatLngBounds();
    var myOptions = {
        zoom: 9,
        mapTypeControl: false,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    };
    map = new google.maps.Map(document.getElementById('map_canvas'),myOptions);
    for(i=0;i<data.length;i++){
        var point=new google.maps.LatLng(data[i][0],data[i][1]);
        var a = new google.maps.Marker({position: point,map: map, icon:'someHotelIcon.png'});
        a.lat=data[i][0];
        a.lng=data[i][1];
        a.nume=data[i][2];
        a.poze=data[i][3];
        a.desc=data[i][4];
        a.url=data[i][5];
        places.push(a);
    }
    for(i=0;i<places.length;i++){
        var point2=new google.maps.LatLng(places[i].lat,places[i].lng);
        bounds.extend(point2);
    }
    map.fitBounds(bounds);
    var objLoc=new google.maps.LatLng(45.515038,26.366935);
    var objectiveMarker = new google.maps.Marker({position: objLoc,map: map, icon:'objectiveIcon.png'});    //---------------Marker for objective
    for (var i = 0; i < places.length; i++) {
        var marker = places[i];
        google.maps.event.addListener(marker, 'click', function () {
        MyInfoWindow.setContent(this.nume+'<br/>'+this.desc+'<br/><a href=\"'+this.url+'\">link</a>');
        MyInfoWindow.open(map, this);
        });
    }
</script>
</body>
</html>
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