<?php

function request_cache($url, $dest_file, $timeout=43200) {
  if(!file_exists($dest_file) || filemtime($dest_file) < (time()-$timeout)) {
    $stream = fopen($url,'r');
    $tmpf = tempnam('/tmp','YWS');
    file_put_contents($tmpf, $stream);
    fclose($stream);
    rename($tmpf, $dest_file);
  }
}

function yahoo_geo($location) {
  $q = 'http://api.local.yahoo.com/MapsService/V1/geocode';
  $q .= '?appid=rlerdorf&location='.rawurlencode($location);
  $tmp = '/tmp/yws_geo_'.md5($q);
  request_cache($q, $tmp, 43200);
  libxml_use_internal_errors(true);
  $xml = simplexml_load_file($tmp); 
  if(!is_object($xml)) return false;
  $ret['precision'] = (string)$xml->Result['precision'];
  foreach($xml->Result->children() as $key=>$val) {
    if(strlen($val)) $ret[(string)$key] =  (string)$val;
  } 
  return $ret;
}

?>