Coordinates from ZIP Code

/**
 * Get latitude and longitude from german ZIP Code
 *
 * @param   string      URL for geocode table
 * @return  array       Array with Latitude and Longitude and the Cities Name like
 *                      01067 =>
 *                          lat => 1.12351
 *                          lng => 45.4541
 *                          title => Dresden
 */
public function getCoordinatesFromZip($geocodeurl = 'http://fa-technik.adfc.de/code/opengeodb/PLZ.tab') {
    $arr = array();
    $table = t3lib_div::getUrl($geocodeurl); // read url
    $lines = t3lib_div::trimExplode("\n", $table, 1); // split every line
    for ($i = 0; $i < count($lines); $i++) { // one loop for every line
        $line = explode("\t", $lines[$i]);
        $arr[$line[1]] = array (
            'title' => $line[4], // Name of the City
            'lng' => $line[2], // Latitude
            'lat' => $line[3] // Longitude
        );
    }

    return $arr;
}