Snippets Graphics
Graphics
Google map plotter Class in PHP5
by: Rahul Sinha
|
December 15, 2008
Version: 0.0.1
Type: Class
Category: Graphics
License: GNU General Public License
Description: Hi, Just now I have written a class which will plot a google map on your page using address as a input parameter. I am sure you all find it very useful, if you have any questions/suggestions mail me at rahul@zimaudio.com or post a comment directly into forum. Thanks.
<?php
/****
* Google map plotter -
*
* File: gmapPlotter.php,v $
* Created on: 2008-12-15
*
* Copyright (c) 2008 - Rahul Sinha <rahul@zimaudio.com>
*
* This Class is a free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
*
* This Class is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library in the file LICENSE.LGPL; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
* gmapPlotter.php is a simple script to plot Google Map using GMAp API. It can be executed from
* a browser or from the command line.
*
* @copyright 2008 Rahul Sinha
* @author Rahul Sinha <rahul@zimaudio.com>
* @package gmapPlotter.tar
* @version 0.0.1
*
****/
class googleMapGeocoder
{
var $address;
var $KEY;
var $MAPS_HOST;
var $delay;
var $base_url;
var $geocode_pending;
public function __construct()
{
$this->KEY = "Your Key Here";
$this->MAPS_HOST = "maps.google.com";
$this->delay = 0;
$this->base_url = "http://" . $this->MAPS_HOST . "/maps/geo?output=xml" . "&key=" . $this->KEY;
$this->geocode_pending = true;
}
public function geocodeAddress($pAddress)
{
$this->address = $pAddress;
$latlonArr = array();
while($this->geocode_pending)
{
$request_url = $this->base_url . "&q=" . urlencode($this->address);
$xml = simplexml_load_file($request_url) or die("url not loading");
$status = $xml->Response->Status->code;
if (strcmp($status, "200") == 0) {
// Successful geocode
$this->geocode_pending = false;
$coordinates = $xml->Response->Placemark->Point->coordinates;
$coordinatesSplit = split(",", $coordinates);
// Format: Longitude, Latitude, Altitude
$lat = $coordinatesSplit[1];
$lng = $coordinatesSplit[0];
$latlonArr['lat'] = $lat;
$latlonArr['lon'] = $lng;
} else if (strcmp($status, "620") == 0) {
// sent geocodes too fast
$delay += 100000;
} else {
// failure to geocode
$this->geocode_pending = false;
}
usleep($delay);
break;
}
return $latlonArr;
}
public function plotgoogleMap($pArr)
{
#print_r($pArr);
$str = '<script>
var map = new GMap2(document.getElementById("map"));
map.addControl(new GLargeMapControl());
map.addControl(new GMapTypeControl());
map.addControl(new GScaleControl());
map.setCenter(new GLatLng('.$pArr[lat].', '.$pArr[lon].'), 6);
// Creates a default marker whose info window displays the given number
function createMarker(point, number)
{
var marker = new GMarker(point);
// Show this markers index in the info window when it is clicked
var html = number;
GEvent.addListener(marker, "click", function() {marker.openInfoWindowHtml(html);});
return marker;
};';
$str .= "var point = new GLatLng(" . $pArr['lat'] . "," . $pArr['lon'] . ");\n";
$str .= "var marker = createMarker(point, '" . addslashes($this->address)."');\n";
$str .= "map.addOverlay(marker);\n";
$str .= "</script>\n";
return $str;
}
}
?>
<?php
/****
* This file is a example of gmapPlotter Class
* Req : PHP5, Simple XML , Google map api key for your site
****/
require("gmapPlotter.php");
$mapObj = new googleMapGeocoder();
$address = "Taj mahal ,Agra, India";
$latlonArr = $mapObj->geocodeAddress($address);
#print_r($latlonArr);
?>
<script src="http://maps.google.com/maps?file=api&v=2&key=your gmap api key here"
type="text/javascript">
</script>
<html>
<head>
<title> Google Map </title>
</head>
<body>
<div id="map" style="width: 500px;height:400px"></div>
<?php
// plot the map with default marker icon
echo $mapObj->plotgoogleMap($latlonArr);
?>
</body>
</html>
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