PHP读取谷歌天气API的XML方法 [ 技术分享 ]

<?php 
$content = file_get_contents("http://www.google.com/ig/api?weather=nanjing&hl=zh-cn");
$content || die("No such city's data");
$content = mb_convert_encoding($content, 'UTF-8','GBK');//由于谷歌的xml头部没有标注编码所以要进行转换
$xml = simplexml_load_string($content);
//	
$date = $xml->weather->forecast_information->forecast_date->attributes();
$html = $date. "<br>\r\n";
$current = $xml->weather->current_conditions;
$condition = $current->condition->attributes();
$temp_c = $current->temp_c->attributes();
$humidity = $current->humidity->attributes();
$icon = $current->icon->attributes();
$wind = $current->wind_condition->attributes();
$condition && $condition = $xml->weather->forecast_conditions->condition->attributes();
$icon && $icon = $xml->weather->forecast_conditions->icon->attributes();
$html.= "当前: {$condition}, {$temp_c}°C,<img src='http://www.google.com/ig{$icon}'/> {$humidity} {$wind} <br />\r\n";
foreach($xml->weather->forecast_conditions as $forecast) {
    $low = $forecast->low->attributes();
    $high = $forecast->high->attributes();
    $icon = $forecast->icon->attributes();
    $condition = $forecast->condition->attributes();
    $day_of_week = $forecast->day_of_week->attributes();
    $html.= "{$day_of_week} : {$high} / {$low} °C, {$condition} <img src='http://www.google.com/ig{$icon}' /><br />\r\n";
}
echo $html;
?>