<?php
header ( 'Content-Type: text/html; charset = utf-8' );
class weather {
static $url = 'http://xml.weather.yahoo.com/forecastrss?u=c&w=';
static $city = 'Beijing'; //默认城市北京 这里要注意的是 city 要填拼音 我试过用中文有好几个地区都调用不到
static $weatherXML = '';
static $woeid_file = "woeid";
static $file_path = "data/";
/**
* 获得远程xml并缓存到本地
*/
static public function getXML($city = null) {
if ($city != null){
self::$city = $city;
}
self::$weatherXML = self::$file_path . md5(self::$city) . '-weather.xml';
if (
file_exists( self::$weatherXML )) {
$fileTime = filemtime ( self::$weatherXML );
$stater = time () - $fileTime - 60 * 60 * 2;
if ($stater > 0) {
return true;
}
}
//获取woeid
$woeid = self::getWOEID();
self::$url = self::$url . $woeid[0];
//获取当天 天气
$XML = self::vget(self::$url);
//保存当天 天气到文件
self::cacheXML($XML);
self::analysisXML($XML);
}
static public function analysisXML($simple) {
$p = xml_parser_create();
xml_parse_into_struct($p, $simple, $vals, $index);
xml_parser_free($p);
//本周天气
$weekindex = $index['YWEATHER:FORECAST'];
$week = array();
foreach($weekindex as $k=>$v){
$week[$k] = $vals[$v]['attributes'];
}
unset($index);
unset($vals);
print_r($week);
/*
<yweather:forecast day="Wed" date="18 Sep 2013" low="20" high="32" text="Sunny" code="32"/>
* day 星期
* date 日期
* low 最低温度
* high 最高温度
* test 天气状态
* code 天气图标
*/
}
/*
* 取得地区WOEID码
*/
static private function getWOEID(){
static $woeid = array();
if(isset($woeid[self::$city])){
return $woeid[self::$city];
}
if (file_exists( self::$file_path . self::$woeid_file )) {
$woeidSTR =
file_get_contents(self::$file_path . self::$woeid_file);
$woeid = json_decode($woeidSTR , true);
if(isset($woeid[self::$city])){
return $woeid[self::$city];
}
}
$geoPlaces = "http://query.yahooapis.com/v1/public/yql?q=select%20woeid%20from%20geo.places%20where%20text='".self::$city."%20CH'";
$XML = simplexml_load_file( $geoPlaces );
if(isset($XML->results->place[0])){
$rs = $woeid[self::$city] = $XML->results->place[0]->woeid;
//保存到文件
$woeidSTR = json_encode($woeid);
file_put_contents(self::$file_path . self::$woeid_file, $woeidSTR);
return $rs;
}else{
//如果找不到城市 woeid 默认城市就改为 北京
self::$city = "Beijing";
return self::getWOEID();
}
}
/**
* 创建xml缓存
* @param $contents 要缓存的内容
*/
static private function cacheXML($contents) {
$contents = str_ireplace ( '<?xml version="1.0"?>', "<?xml version="1.0"?> n", $contents );
$contents =
mb_convert_encoding ( $contents, 'utf-8', 'gbk' );
file_put_contents ( self::$weatherXML, $contents ) or die ( '没有写权限' );
}
/**
* 模拟获取内容函数
* @param type $url
* @return type
*/
static private function vget($url) {
$user_agent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.1.4322)";
$curl = curl_init (); // 启动一个CURL会话
curl_setopt ( $curl, CURLOPT_URL, $url ); // 要访问的地址
curl_setopt ( $curl, CURLOPT_SSL_VERIFYPEER, 0 ); // 对认证证书来源的检查
curl_setopt ( $curl, CURLOPT_SSL_VERIFYHOST, 1 ); // 从证书中检查SSL加密算法是否存在
curl_setopt ( $curl, CURLOPT_USERAGENT, $user_agent ); // 模拟用户使用的浏览器
@curl_setopt ( $curl, CURLOPT_FOLLOWLOCATION, 1 ); // 使用自动跳转
curl_setopt ( $curl, CURLOPT_AUTOREFERER, 1 ); // 自动设置Referer
curl_setopt ( $curl, CURLOPT_HTTPGET, 1 ); // 发送一个常规的Post请求
curl_setopt ( $curl, CURLOPT_TIMEOUT, 120 ); // 设置超时限制防止死循环
curl_setopt ( $curl, CURLOPT_HEADER, 0 ); // 显示返回的Header区域内容
curl_setopt ( $curl, CURLOPT_RETURNTRANSFER, 1 ); // 获取的信息以文件流的形式返回
$tmpInfo = curl_exec ( $curl ); // 执行操作
if (curl_errno ( $curl )) {
curl_close ( $curl ); // 关闭CURL会话
die('Errno' . curl_error ( $curl )) ;
}
curl_close ( $curl ); // 关闭CURL会话
return $tmpInfo; // 返回数据
}
}
weather::getXML("Changsha");
