PHP Geocoding with the Google Maps API

PHP Geocoding with the Google Maps API

<?php
error_reporting(E_ALL);
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);

ini_set('max_execution_time', 0);

/**
 * [] First, sign up for a key. http://code.google.com/apis/maps/signup.html
 *
 * [] A few people have mentioned that after some number of requests (between 100-300)
 * in quick succession google will kill your access for the day, so you may want to insert a
 *
 * sleep(1);
 *
 * To stagger the requests a little.
 *
 * [] Other Resources: http://code.google.com/p/php-google-map-api/
 *
 * [] Note: GEOCODE (Geospatial Entity Object Code) is a standardized all-natural number 
 * representation format specification for geospatial coordinate measurements that 
 * provide details of the exact location of geospatial point at, below, or above the surface 
 * of the earth at a specified moment of time.
 * Reference: http://en.wikipedia.org/wiki/Geocode
 */

//Set up our variables
$longitude = "";
$latitude = "";
$precision = "";

//Three parts to the querystring: q is address, output is the format, key is the GAPI key
$key = 'Your_Key_Here';

//$address = urlencode("1600 Amphitheatre Parkway");  // specify postal code or address.
$address = urlencode("94043");  // specify postal code or address.

### output_format:
### xml: 
### csv: status, accuracy, latitude, longitude
### json:
$output_format = 'json'; // xml, csv, or json.

$url = 'http://maps.google.com/maps/geo?q=' . $address . '&output=' . $output_format . '&key=' . $key;

echo $url . '
';

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER,0);
curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER["HTTP_USER_AGENT"]);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

$data = curl_exec($ch);

curl_close($ch);

//echo '
';
//print_r($data);
//echo '
';

if ($output_format == 'json') {
  $data_json = json_decode($data);

  ### If status 200 okay.
  if ($data_json->Status->code == '200') {
    echo 'longitude: ' . $data_json->Placemark[0]->Point->coordinates[0];  // longitude
    echo '
';
    echo 'latitude: ' . $data_json->Placemark[0]->Point->coordinates[1];  // latitude
  }

  echo '
';
  print_r($data_json);
  echo '
';
}
elseif ($output_format == 'csv') {
  $data_csvArr = str_getcsv_mem($data);

  ### If status 200 okay.
  if ($data_csvArr[0] == '200') {
    echo 'accuracy: ' . $data_csvArr[1];  // accuracy
    echo 'latitude: ' . $data_csvArr[2];  // latitude
    echo '
';
    echo 'longitude: ' . $data_csvArr[3];  // longitude
  }
}


function str_getcsv_mem($input, $delimiter = ",", $enclosure = '"', $escape = "\\") {
  $outputArr = Null;

  $oneHundredKBs = 1 * 100 * 1024;
  $fp = fopen('php://temp/maxmemory:' . $oneHundredKBs, 'r+');
  fputs($fp, $input);
  rewind($fp);

  $rowCount = 0;
  while (($row = fgetcsv($fp, 0, $delimiter, $enclosure)) !== FALSE) { //$escape only got added in 5.3.0
    foreach ($row as $key => $col) {
      $outputArr[$rowCount][$key] = $col;
    }

    $rowCount++;
  }

  fclose($fp);

  return $outputArr;
}

/*
stdClass Object
(
    [name] => 94043
    [Status] => stdClass Object
        (
            [code] => 200
            [request] => geocode
        )

    [Placemark] => Array
        (
            [0] => stdClass Object
                (
                    [id] => p1
                    [address] => Mountain View, CA 94043, USA
                    [AddressDetails] => stdClass Object
                        (
                            [Accuracy] => 5
                            [Country] => stdClass Object
                                (
                                    [AdministrativeArea] => stdClass Object
                                        (
                                            [AdministrativeAreaName] => CA
                                            [SubAdministrativeArea] => stdClass Object
                                                (
                                                    [Locality] => stdClass Object
                                                        (
                                                            [LocalityName] => Mountain View
                                                            [PostalCode] => stdClass Object
                                                                (
                                                                    [PostalCodeNumber] => 94043
                                                                )

                                                        )

                                                    [SubAdministrativeAreaName] => Santa Clara
                                                )

                                        )

                                    [CountryName] => USA
                                    [CountryNameCode] => US
                                )

                        )

                    [ExtendedData] => stdClass Object
                        (
                            [LatLonBox] => stdClass Object
                                (
                                    [north] => 37.4505349
                                    [south] => 37.38567
                                    [east] => -122.03277
                                    [west] => -122.10842
                                )

                        )

                    [Point] => stdClass Object
                        (
                            [coordinates] => Array
                                (
                                    [0] => -122.0723816
                                    [1] => 37.428434
                                    [2] => 0
                                )

                        )

                )

        )

)
*/
?>