php获取google当前天气实现程序

$city = $_GET['city'];
$data = createXml($city);

$xml = simplexml_load_string($data);
header("Content-type: text/xml");
echo $xml->asXML();

// 生成XML数据
function createXml($city)
{
// Google 天气API
$weather = simplexml_load_file("http://www.google.com/ig/api?weather={$city}");
if(isset($weather->weather->forecast_conditions))
{
$low = f2c($weather->weather->forecast_conditions->low['data']);
$high = f2c($weather->weather->forecast_conditions->high['data']);
return "n{$city}n{$low}n{$high}n";
}
else
{
return "nn";
}
}

// 华氏度转摄氏度
function f2c($fahrenhite)
{
return floor(($fahrenhite - 32) / 1.8);
}

City:{$xml->city}

Low:{$xml->low}

High:{$xml->high}