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replaces deprecated split(), adds .gitignore

pull/1/head
Gerhard Koch 5 years ago
parent
commit
f5ee38f2e3
2 changed files with 344 additions and 329 deletions
  1. +1
    -0
      .gitignore
  2. +343
    -329
      staticmap.php

+ 1
- 0
.gitignore View File

@@ -0,0 +1 @@
.idea/

+ 343
- 329
staticmap.php View File

@@ -1,7 +1,7 @@
<?php

/**
* staticMapLite 0.03
* staticMapLite 0.3.1
*
* Copyright 2009 Gerhard Koch
*
@@ -19,340 +19,354 @@
*
* @author Gerhard Koch <gerhard.koch AT ymail.com>
*
* USAGE:
* USAGE:
*
* staticmap.php?center=40.714728,-73.998672&zoom=14&size=512x512&maptype=mapnik&markers=40.702147,-74.015794,blues|40.711614,-74.012318,greeng|40.718217,-73.998284,redc
*
*/
*/

error_reporting(0);
ini_set('display_errors','off');

Class staticMapLite {

protected $maxWidth = 1024;
protected $maxHeight = 1024;

protected $tileSize = 256;
protected $tileSrcUrl = array( 'mapnik' => 'http://tile.openstreetmap.org/{Z}/{X}/{Y}.png',
'osmarenderer' => 'http://otile1.mqcdn.com/tiles/1.0.0/osm/{Z}/{X}/{Y}.png',
'cycle' => 'http://c.andy.sandbox.cloudmade.com/tiles/cycle/{Z}/{X}/{Y}.png',
'cycle' => 'http://a.tile.opencyclemap.org/cycle/{Z}/{X}/{Y}.png',
'piste' => 'http://tiles.openpistemap.org/nocontours/{Z}/{X}/{Y}.png',
'piste' => 'http://openpistemap.org/tiles/contours/{Z}/{X}/{Y}.png',
'hikebike' => 'http://toolserver.org/tiles/hikebike/{Z}/{X}/{Y}.png'

);
protected $tileDefaultSrc = 'mapnik';
protected $markerBaseDir = 'images/markers';
protected $osmLogo = 'images/osm_logo.png';
protected $markerPrototypes = array(// found at http://www.mapito.net/map-marker-icons.html
'lighblue' => array('regex'=>'/^lightblue([0-9]+)$/',
'extension'=>'.png',
'shadow'=>false,
'offsetImage'=>'0,-19',
'offsetShadow'=>false
),
// openlayers std markers
'ol-marker'=> array('regex'=>'/^ol-marker(|-blue|-gold|-green)+$/',
'extension'=>'.png',
'shadow'=>'../marker_shadow.png',
'offsetImage'=>'-10,-25',
'offsetShadow'=>'-1,-13'
),
// taken from http://www.visual-case.it/cgi-bin/vc/GMapsIcons.pl
'ylw'=> array('regex'=>'/^(pink|purple|red|ltblu|ylw)-pushpin$/',
'extension'=>'.png',
'shadow'=>'../marker_shadow.png',
'offsetImage'=>'-10,-32',
'offsetShadow'=>'-1,-13'
)
);


protected $useTileCache = true;
protected $tileCacheBaseDir = 'cache/tiles';

protected $useMapCache = true;
protected $mapCacheBaseDir = 'cache/maps';
protected $mapCacheID = '';
protected $mapCacheFile = '';
protected $mapCacheExtension = 'png';
protected $zoom, $lat, $lon, $width, $height, $markers, $image, $maptype;
protected $centerX, $centerY, $offsetX, $offsetY;

public function __construct(){
$this->zoom = 0;
$this->lat = 0;
$this->lon = 0;
$this->width = 500;
$this->height = 350;
$this->markers = array();
$this->maptype = $this->tileDefaultSrc;
}
public function parseParams(){
global $_GET;
// get zoom from GET paramter
$this->zoom = $_GET['zoom']?intval($_GET['zoom']):0;
if($this->zoom>18)$this->zoom = 18;
// get lat and lon from GET paramter
list($this->lat,$this->lon) = split(',',$_GET['center']);
$this->lat = floatval($this->lat);
$this->lon = floatval($this->lon);
// get zoom from GET paramter
if($_GET['size']){
list($this->width, $this->height) = split('x',$_GET['size']);
$this->width = intval($this->width);
if($this->width > $this->maxWidth) $this->width = $this->maxWidth;
$this->height = intval($this->height);
if($this->height > $this->maxHeight) $this->height = $this->maxHeight;
}
if($_GET['markers']){
$markers = split('%7C|\|',$_GET['markers']);
foreach($markers as $marker){
list($markerLat, $markerLon, $markerType) = split(',',$marker);
$markerLat = floatval($markerLat);
$markerLon = floatval($markerLon);
$markerType = basename($markerType);
$this->markers[] = array('lat'=>$markerLat, 'lon'=>$markerLon, 'type'=>$markerType);
}
}
if($_GET['maptype']){
if(array_key_exists($_GET['maptype'],$this->tileSrcUrl)) $this->maptype = $_GET['maptype'];
}
}

public function lonToTile($long, $zoom){
return (($long + 180) / 360) * pow(2, $zoom);
}

public function latToTile($lat, $zoom){
return (1 - log(tan($lat * pi()/180) + 1 / cos($lat* pi()/180)) / pi()) /2 * pow(2, $zoom);
}

public function initCoords(){
$this->centerX = $this->lonToTile($this->lon, $this->zoom);
$this->centerY = $this->latToTile($this->lat, $this->zoom);
$this->offsetX = floor((floor($this->centerX)-$this->centerX)*$this->tileSize);
$this->offsetY = floor((floor($this->centerY)-$this->centerY)*$this->tileSize);
}

public function createBaseMap(){
$this->image = imagecreatetruecolor($this->width, $this->height);
$startX = floor($this->centerX-($this->width/$this->tileSize)/2);
$startY = floor($this->centerY-($this->height/$this->tileSize)/2);
$endX = ceil($this->centerX+($this->width/$this->tileSize)/2);
$endY = ceil($this->centerY+($this->height/$this->tileSize)/2);
$this->offsetX = -floor(($this->centerX-floor($this->centerX))*$this->tileSize);
$this->offsetY = -floor(($this->centerY-floor($this->centerY))*$this->tileSize);
$this->offsetX += floor($this->width/2);
$this->offsetY += floor($this->height/2);
$this->offsetX += floor($startX-floor($this->centerX))*$this->tileSize;
$this->offsetY += floor($startY-floor($this->centerY))*$this->tileSize;

for($x=$startX; $x<=$endX; $x++){
for($y=$startY; $y<=$endY; $y++){
$url = str_replace(array('{Z}','{X}','{Y}'),array($this->zoom, $x, $y), $this->tileSrcUrl[$this->maptype]);
$tileData = $this->fetchTile($url);
if($tileData){
$tileImage = imagecreatefromstring($tileData);
} else {
$tileImage = imagecreate($this->tileSize,$this->tileSize);
$color = imagecolorallocate($tileImage, 255, 255, 255);
@imagestring($tileImage,1,127,127,'err',$color);
}
$destX = ($x-$startX)*$this->tileSize+$this->offsetX;
$destY = ($y-$startY)*$this->tileSize+$this->offsetY;
imagecopy($this->image, $tileImage, $destX, $destY, 0, 0, $this->tileSize, $this->tileSize);
}
}
}


public function placeMarkers(){
// loop thru marker array
foreach($this->markers as $marker){
// set some local variables
$markerLat = $marker['lat'];
$markerLon = $marker['lon'];
$markerType = $marker['type'];
// clear variables from previous loops
$markerFilename = '';
$markerShadow = '';
$matches = false;
// check for marker type, get settings from markerPrototypes
if($markerType){
foreach($this->markerPrototypes as $markerPrototype){
if(preg_match($markerPrototype['regex'],$markerType,$matches)){
$markerFilename = $matches[0].$markerPrototype['extension'];
if($markerPrototype['offsetImage']){
list($markerImageOffsetX, $markerImageOffsetY) = split(",",$markerPrototype['offsetImage']);
}
$markerShadow = $markerPrototype['shadow'];
if($markerShadow){
list($markerShadowOffsetX, $markerShadowOffsetY) = split(",",$markerPrototype['offsetShadow']);
}
}
}
}

// check required files or set default
if($markerFilename == '' || !file_exists($this->markerBaseDir.'/'.$markerFilename)){
$markerIndex++;
$markerFilename = 'lightblue'.$markerIndex.'.png';
$markerImageOffsetX = 0;
$markerImageOffsetY = -19; }
// create img resource
if(file_exists($this->markerBaseDir.'/'.$markerFilename)){
$markerImg = imagecreatefrompng($this->markerBaseDir.'/'.$markerFilename);
} else {
$markerImg = imagecreatefrompng($this->markerBaseDir.'/lightblue1.png');
}
// check for shadow + create shadow recource
if($markerShadow && file_exists($this->markerBaseDir.'/'.$markerShadow)){
$markerShadowImg = imagecreatefrompng($this->markerBaseDir.'/'.$markerShadow);
}

// calc position
$destX = floor(($this->width/2)-$this->tileSize*($this->centerX-$this->lonToTile($markerLon, $this->zoom)));
$destY = floor(($this->height/2)-$this->tileSize*($this->centerY-$this->latToTile($markerLat, $this->zoom)));

// copy shadow on basemap
if($markerShadow && $markerShadowImg){
imagecopy($this->image, $markerShadowImg, $destX+intval($markerShadowOffsetX), $destY+intval($markerShadowOffsetY),
0, 0, imagesx($markerShadowImg), imagesy($markerShadowImg));
}
// copy marker on basemap above shadow
imagecopy($this->image, $markerImg, $destX+intval($markerImageOffsetX), $destY+intval($markerImageOffsetY),
0, 0, imagesx($markerImg), imagesy($markerImg));
};
}



public function tileUrlToFilename($url){
return $this->tileCacheBaseDir."/".str_replace(array('http://'),'',$url);
}

public function checkTileCache($url){
$filename = $this->tileUrlToFilename($url);
if(file_exists($filename)){
return file_get_contents($filename);
}
}
public function checkMapCache(){
$this->mapCacheID = md5($this->serializeParams());
$filename = $this->mapCacheIDToFilename();
if(file_exists($filename)) return true;
}

public function serializeParams(){
return join("&",array($this->zoom,$this->lat,$this->lon,$this->width,$this->height, serialize($this->markers),$this->maptype));
}
public function mapCacheIDToFilename(){
if(!$this->mapCacheFile){
$this->mapCacheFile = $this->mapCacheBaseDir."/".$this->maptype."/".$this->zoom."/cache_".substr($this->mapCacheID,0,2)."/".substr($this->mapCacheID,2,2)."/".substr($this->mapCacheID,4);
}
return $this->mapCacheFile.".".$this->mapCacheExtension;
}


public function mkdir_recursive($pathname, $mode){
is_dir(dirname($pathname)) || $this->mkdir_recursive(dirname($pathname), $mode);
return is_dir($pathname) || @mkdir($pathname, $mode);
}
public function writeTileToCache($url, $data){
$filename = $this->tileUrlToFilename($url);
$this->mkdir_recursive(dirname($filename),0777);
file_put_contents($filename, $data);
}
public function fetchTile($url){
if($this->useTileCache && ($cached = $this->checkTileCache($url))) return $cached;
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0");
curl_setopt($ch, CURLOPT_URL, $url);
$tile = curl_exec($ch);
curl_close($ch);
if($tile && $this->useTileCache){
$this->writeTileToCache($url,$tile);
}
return $tile;

}

public function copyrightNotice(){
$logoImg = imagecreatefrompng($this->osmLogo);
imagecopy($this->image, $logoImg, imagesx($this->image)-imagesx($logoImg), imagesy($this->image)-imagesy($logoImg), 0, 0, imagesx($logoImg), imagesy($logoImg));
}
public function sendHeader(){
header('Content-Type: image/png');
$expires = 60*60*24*14;
header("Pragma: public");
header("Cache-Control: maxage=".$expires);
header('Expires: ' . gmdate('D, d M Y H:i:s', time()+$expires) . ' GMT');
}

public function makeMap(){
$this->initCoords();
$this->createBaseMap();
if(count($this->markers))$this->placeMarkers();
if($this->osmLogo) $this->copyrightNotice();
}

public function showMap(){
$this->parseParams();
if($this->useMapCache){
// use map cache, so check cache for map
if(!$this->checkMapCache()){
// map is not in cache, needs to be build
$this->makeMap();
$this->mkdir_recursive(dirname($this->mapCacheIDToFilename()),0777);
imagepng($this->image,$this->mapCacheIDToFilename(),9);
$this->sendHeader();
if(file_exists($this->mapCacheIDToFilename())){
return file_get_contents($this->mapCacheIDToFilename());
} else {
return imagepng($this->image);
}
} else {
// map is in cache
$this->sendHeader();
return file_get_contents($this->mapCacheIDToFilename());
}

} else {
// no cache, make map, send headers and deliver png
$this->makeMap();
$this->sendHeader();
return imagepng($this->image);
}
}
ini_set('display_errors', 'off');

Class staticMapLite
{

protected $maxWidth = 1024;
protected $maxHeight = 1024;

protected $tileSize = 256;
protected $tileSrcUrl = array('mapnik' => 'http://tile.openstreetmap.org/{Z}/{X}/{Y}.png',
'osmarenderer' => 'http://otile1.mqcdn.com/tiles/1.0.0/osm/{Z}/{X}/{Y}.png',
'cycle' => 'http://a.tile.opencyclemap.org/cycle/{Z}/{X}/{Y}.png',
);

protected $tileDefaultSrc = 'mapnik';
protected $markerBaseDir = 'images/markers';
protected $osmLogo = 'images/osm_logo.png';

protected $markerPrototypes = array(
// found at http://www.mapito.net/map-marker-icons.html
'lighblue' => array('regex' => '/^lightblue([0-9]+)$/',
'extension' => '.png',
'shadow' => false,
'offsetImage' => '0,-19',
'offsetShadow' => false
),
// openlayers std markers
'ol-marker' => array('regex' => '/^ol-marker(|-blue|-gold|-green)+$/',
'extension' => '.png',
'shadow' => '../marker_shadow.png',
'offsetImage' => '-10,-25',
'offsetShadow' => '-1,-13'
),
// taken from http://www.visual-case.it/cgi-bin/vc/GMapsIcons.pl
'ylw' => array('regex' => '/^(pink|purple|red|ltblu|ylw)-pushpin$/',
'extension' => '.png',
'shadow' => '../marker_shadow.png',
'offsetImage' => '-10,-32',
'offsetShadow' => '-1,-13'
)

);


protected $useTileCache = true;
protected $tileCacheBaseDir = '../cache/tiles';

protected $useMapCache = true;
protected $mapCacheBaseDir = '../cache/maps';
protected $mapCacheID = '';
protected $mapCacheFile = '';
protected $mapCacheExtension = 'png';

protected $zoom, $lat, $lon, $width, $height, $markers, $image, $maptype;
protected $centerX, $centerY, $offsetX, $offsetY;

public function __construct()
{
$this->zoom = 0;
$this->lat = 0;
$this->lon = 0;
$this->width = 500;
$this->height = 350;
$this->markers = array();
$this->maptype = $this->tileDefaultSrc;
}

public function parseParams()
{
global $_GET;

// get zoom from GET paramter
$this->zoom = $_GET['zoom'] ? intval($_GET['zoom']) : 0;
if ($this->zoom > 18) $this->zoom = 18;

// get lat and lon from GET paramter
list($this->lat, $this->lon) = explode(',', $_GET['center']);
$this->lat = floatval($this->lat);
$this->lon = floatval($this->lon);

// get zoom from GET paramter
if ($_GET['size']) {
list($this->width, $this->height) = explode('x', $_GET['size']);
$this->width = intval($this->width);
if ($this->width > $this->maxWidth) $this->width = $this->maxWidth;
$this->height = intval($this->height);
if ($this->height > $this->maxHeight) $this->height = $this->maxHeight;
}
if (!empty($_GET['markers'])) {
$markers = explode('|', $_GET['markers']);
foreach ($markers as $marker) {
list($markerLat, $markerLon, $markerType) = explode(',', $marker);
$markerLat = floatval($markerLat);
$markerLon = floatval($markerLon);
$markerType = basename($markerType);
$this->markers[] = array('lat' => $markerLat, 'lon' => $markerLon, 'type' => $markerType);
}

}
if ($_GET['maptype']) {
if (array_key_exists($_GET['maptype'], $this->tileSrcUrl)) $this->maptype = $_GET['maptype'];
}
}

public function lonToTile($long, $zoom)
{
return (($long + 180) / 360) * pow(2, $zoom);
}

public function latToTile($lat, $zoom)
{
return (1 - log(tan($lat * pi() / 180) + 1 / cos($lat * pi() / 180)) / pi()) / 2 * pow(2, $zoom);
}

public function initCoords()
{
$this->centerX = $this->lonToTile($this->lon, $this->zoom);
$this->centerY = $this->latToTile($this->lat, $this->zoom);
$this->offsetX = floor((floor($this->centerX) - $this->centerX) * $this->tileSize);
$this->offsetY = floor((floor($this->centerY) - $this->centerY) * $this->tileSize);
}

public function createBaseMap()
{
$this->image = imagecreatetruecolor($this->width, $this->height);
$startX = floor($this->centerX - ($this->width / $this->tileSize) / 2);
$startY = floor($this->centerY - ($this->height / $this->tileSize) / 2);
$endX = ceil($this->centerX + ($this->width / $this->tileSize) / 2);
$endY = ceil($this->centerY + ($this->height / $this->tileSize) / 2);
$this->offsetX = -floor(($this->centerX - floor($this->centerX)) * $this->tileSize);
$this->offsetY = -floor(($this->centerY - floor($this->centerY)) * $this->tileSize);
$this->offsetX += floor($this->width / 2);
$this->offsetY += floor($this->height / 2);
$this->offsetX += floor($startX - floor($this->centerX)) * $this->tileSize;
$this->offsetY += floor($startY - floor($this->centerY)) * $this->tileSize;

for ($x = $startX; $x <= $endX; $x++) {
for ($y = $startY; $y <= $endY; $y++) {
$url = str_replace(array('{Z}', '{X}', '{Y}'), array($this->zoom, $x, $y), $this->tileSrcUrl[$this->maptype]);
$tileData = $this->fetchTile($url);
if ($tileData) {
$tileImage = imagecreatefromstring($tileData);
} else {
$tileImage = imagecreate($this->tileSize, $this->tileSize);
$color = imagecolorallocate($tileImage, 255, 255, 255);
@imagestring($tileImage, 1, 127, 127, 'err', $color);
}
$destX = ($x - $startX) * $this->tileSize + $this->offsetX;
$destY = ($y - $startY) * $this->tileSize + $this->offsetY;
imagecopy($this->image, $tileImage, $destX, $destY, 0, 0, $this->tileSize, $this->tileSize);
}
}
}


public function placeMarkers()
{
// loop thru marker array
foreach ($this->markers as $marker) {
// set some local variables
$markerLat = $marker['lat'];
$markerLon = $marker['lon'];
$markerType = $marker['type'];
// clear variables from previous loops
$markerFilename = '';
$markerShadow = '';
$matches = false;
// check for marker type, get settings from markerPrototypes
if ($markerType) {
foreach ($this->markerPrototypes as $markerPrototype) {
if (preg_match($markerPrototype['regex'], $markerType, $matches)) {
$markerFilename = $matches[0] . $markerPrototype['extension'];
if ($markerPrototype['offsetImage']) {
list($markerImageOffsetX, $markerImageOffsetY) = explode(",", $markerPrototype['offsetImage']);
}
$markerShadow = $markerPrototype['shadow'];
if ($markerShadow) {
list($markerShadowOffsetX, $markerShadowOffsetY) = explode(",", $markerPrototype['offsetShadow']);
}
}

}
}

// check required files or set default
if ($markerFilename == '' || !file_exists($this->markerBaseDir . '/' . $markerFilename)) {
$markerIndex++;
$markerFilename = 'lightblue' . $markerIndex . '.png';
$markerImageOffsetX = 0;
$markerImageOffsetY = -19;
}

// create img resource
if (file_exists($this->markerBaseDir . '/' . $markerFilename)) {
$markerImg = imagecreatefrompng($this->markerBaseDir . '/' . $markerFilename);
} else {
$markerImg = imagecreatefrompng($this->markerBaseDir . '/lightblue1.png');
}

// check for shadow + create shadow recource
if ($markerShadow && file_exists($this->markerBaseDir . '/' . $markerShadow)) {
$markerShadowImg = imagecreatefrompng($this->markerBaseDir . '/' . $markerShadow);
}

// calc position
$destX = floor(($this->width / 2) - $this->tileSize * ($this->centerX - $this->lonToTile($markerLon, $this->zoom)));
$destY = floor(($this->height / 2) - $this->tileSize * ($this->centerY - $this->latToTile($markerLat, $this->zoom)));

// copy shadow on basemap
if ($markerShadow && $markerShadowImg) {
imagecopy($this->image, $markerShadowImg, $destX + intval($markerShadowOffsetX), $destY + intval($markerShadowOffsetY),
0, 0, imagesx($markerShadowImg), imagesy($markerShadowImg));
}

// copy marker on basemap above shadow
imagecopy($this->image, $markerImg, $destX + intval($markerImageOffsetX), $destY + intval($markerImageOffsetY),
0, 0, imagesx($markerImg), imagesy($markerImg));

};
}


public function tileUrlToFilename($url)
{
return $this->tileCacheBaseDir . "/" . str_replace(array('http://'), '', $url);
}

public function checkTileCache($url)
{
$filename = $this->tileUrlToFilename($url);
if (file_exists($filename)) {
return file_get_contents($filename);
}
}

public function checkMapCache()
{
$this->mapCacheID = md5($this->serializeParams());
$filename = $this->mapCacheIDToFilename();
if (file_exists($filename)) return true;
}

public function serializeParams()
{
return join("&", array($this->zoom, $this->lat, $this->lon, $this->width, $this->height, serialize($this->markers), $this->maptype));
}

public function mapCacheIDToFilename()
{
if (!$this->mapCacheFile) {
$this->mapCacheFile = $this->mapCacheBaseDir . "/" . $this->maptype . "/" . $this->zoom . "/cache_" . substr($this->mapCacheID, 0, 2) . "/" . substr($this->mapCacheID, 2, 2) . "/" . substr($this->mapCacheID, 4);
}
return $this->mapCacheFile . "." . $this->mapCacheExtension;
}


public function mkdir_recursive($pathname, $mode)
{
is_dir(dirname($pathname)) || $this->mkdir_recursive(dirname($pathname), $mode);
return is_dir($pathname) || @mkdir($pathname, $mode);
}

public function writeTileToCache($url, $data)
{
$filename = $this->tileUrlToFilename($url);
$this->mkdir_recursive(dirname($filename), 0777);
file_put_contents($filename, $data);
}

public function fetchTile($url)
{
if ($this->useTileCache && ($cached = $this->checkTileCache($url))) return $cached;
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0");
curl_setopt($ch, CURLOPT_URL, $url);
$tile = curl_exec($ch);
curl_close($ch);
if ($tile && $this->useTileCache) {
$this->writeTileToCache($url, $tile);
}
return $tile;

}

public function copyrightNotice()
{
$logoImg = imagecreatefrompng($this->osmLogo);
imagecopy($this->image, $logoImg, imagesx($this->image) - imagesx($logoImg), imagesy($this->image) - imagesy($logoImg), 0, 0, imagesx($logoImg), imagesy($logoImg));

}

public function sendHeader()
{
header('Content-Type: image/png');
$expires = 60 * 60 * 24 * 14;
header("Pragma: public");
header("Cache-Control: maxage=" . $expires);
header('Expires: ' . gmdate('D, d M Y H:i:s', time() + $expires) . ' GMT');
}

public function makeMap()
{
$this->initCoords();
$this->createBaseMap();
if (count($this->markers)) $this->placeMarkers();
if ($this->osmLogo) $this->copyrightNotice();
}

public function showMap()
{
$this->parseParams();
if ($this->useMapCache) {
// use map cache, so check cache for map
if (!$this->checkMapCache()) {
// map is not in cache, needs to be build
$this->makeMap();
$this->mkdir_recursive(dirname($this->mapCacheIDToFilename()), 0777);
imagepng($this->image, $this->mapCacheIDToFilename(), 9);
$this->sendHeader();
if (file_exists($this->mapCacheIDToFilename())) {
return file_get_contents($this->mapCacheIDToFilename());
} else {
return imagepng($this->image);
}
} else {
// map is in cache
$this->sendHeader();
return file_get_contents($this->mapCacheIDToFilename());
}

} else {
// no cache, make map, send headers and deliver png
$this->makeMap();
$this->sendHeader();
return imagepng($this->image);

}
}

}

$map = new staticMapLite();
print $map->showMap();

?>
print $map->showMap();

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