一个高效的根据IP自动显示天气预报的方案

php代码

<?php
class weather{
    // 省和省会
    private $capital = array(
        &#39;黑龙江省&#39;=>&#39;哈尔滨市&#39;,
        &#39;吉林省&#39;=>&#39;长春市&#39;,
        &#39;辽宁省&#39;=>&#39;沈阳市&#39;,
        &#39;河北省&#39;=>&#39;石家庄市&#39;,
        &#39;山西省&#39;=>&#39;太原市&#39;,
        &#39;山东省&#39;=>&#39;济南市&#39;,
        &#39;青海省&#39;=>&#39;西宁市&#39;,
        &#39;甘肃省&#39;=>&#39;兰州市&#39;,
        &#39;陕西省&#39;=>&#39;西安市&#39;,
        &#39;河南省&#39;=>&#39;郑州市&#39;,
        &#39;江苏省&#39;=>&#39;南京市&#39;,
        &#39;四川省&#39;=>&#39;成都市&#39;,
        &#39;湖北省&#39;=>&#39;武汉市&#39;,
        &#39;安徽省&#39;=>&#39;合肥市&#39;,
        &#39;浙江省&#39;=>&#39;杭州市&#39;,
        &#39;湖南省&#39;=>&#39;长沙市&#39;,
        &#39;江西省&#39;=>&#39;南昌市&#39;,
        &#39;贵州省&#39;=>&#39;贵阳市&#39;,
        &#39;福建省&#39;=>&#39;福州市&#39;,
        &#39;台湾省&#39;=>&#39;台北市&#39;,
        &#39;云南省&#39;=>&#39;昆明市&#39;,
        &#39;广东省&#39;=>&#39;广州市&#39;,
        &#39;海南省&#39;=>&#39;海口市&#39;,
        &#39;上海市&#39;=>&#39;上海&#39;,
        &#39;北京市&#39;=>&#39;北京&#39;,
        &#39;天津市&#39;=>&#39;天津&#39;,
        &#39;重庆市&#39;=>&#39;重庆&#39;,
        &#39;香港&#39;=>&#39;香港&#39;,
        &#39;澳门&#39;=>&#39;澳门&#39;,
        &#39;新疆&#39;=>&#39;乌鲁木齐市&#39;,
        &#39;内蒙古&#39;=>&#39;呼和浩特市&#39;,
        &#39;宁夏&#39;=>&#39;银川市&#39;,
        &#39;西藏&#39;=>&#39;拉萨市&#39;,
        &#39;广西&#39;=>&#39;南宁市&#39;
    );
    public $province = &#39;北京&#39;;// 默认
    public $city = &#39;北京&#39;;// 默认

    // 获取ip
    static function getIP(){
        $ip = &#39;127.0.0.1&#39;;
        if(isset($_SERVER)){
            if(isset($_SERVER["HTTP_X_FORWARDED_FOR"])){
                $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
            }else if(isset($_SERVER["HTTP_CLIENT_IP"])) {
                $ip = $_SERVER["HTTP_CLIENT_IP"];
            }else{
                $ip = $_SERVER["REMOTE_ADDR"];
            }
        }else{
            if(getenv("HTTP_X_FORWARDED_FOR")){
                $ip = getenv("HTTP_X_FORWARDED_FOR");
            }else if(getenv("HTTP_CLIENT_IP")) {
                $ip = getenv("HTTP_CLIENT_IP");
            }else{
                $ip = getenv("REMOTE_ADDR");
            }
        }
        return $ip;
    }

    public function setArea($addr){
        // 分割省市
        foreach($this->capital as $p => $c){
            if(strpos($addr,$p) === 0){
                $this->province = str_replace(array(&#39;省&#39;,&#39;市&#39;),&#39;&#39;,$p);
                $this->city = substr($addr,strlen($p));
                if($this->city == &#39;&#39;){
                    $this->city = $c;// 默认省会
                }
            }
        }
    }
    public function getAreaCode(){
        $code = &#39;101010100&#39;;// 默认北京
        // 到本地地区库里找中国气象地区编码，可以把序列化数据直接反序列化后放到本文件里，会更快
        $area = file_get_contents("area.php");
        $area = unserialize($area);
        //print_r($area);
        $province = array();
        foreach($area as $k => $v){
            $province[$k] = $v[&#39;level0&#39;];
        }

        $pid = array_search($this->province,$province);
        if($pid !== false){
            $citys = $area[$pid][&#39;level1&#39;];
            $cityid = array_search($this->city,$citys);
            if($cityid !== false){
                $code = &#39;101&#39;.$cityid.&#39;01&#39;;
            }else{
                $code = &#39;101&#39;.$pid.&#39;0101&#39;;
            }
        }
        return $code;
    }
}

/*
    纯真ip库返回的地区格式如下：
    xx省xx市 或者 xx市 如果是自治区则为：新疆乌鲁木齐市，分割省市极麻烦
*/

$weather = new weather();
// php的扩展iplocation
$addrarr = iplocation_fetch(weather::getIP());
$addr = iconv(&#39;gbk&#39;,&#39;utf-8&#39;,$addrarr[&#39;province&#39;]);
$weather->setArea($addr);
$code = $weather->getAreaCode();

// 尝试从redis里读取天气数据
$redis_host = &#39;127.0.0.1&#39;;
$redis_port = 6379;
/* redis connect */
$redis = new Redis();
$redis->connect($redis_host, $redis_port);

$data = $redis->get($code);
if(!$data){
    // 从中国气象去抓，并存入redis
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, "http://m.weather.com.cn/data/{$code}.html");
    curl_setopt($curl, CURLOPT_HEADER, 0);
    curl_setopt ($curl, CURLOPT_TIMEOUT, 30 );
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    $data = curl_exec($curl);
    curl_close($curl);
    if($data){
        $redis->set($code,$data);
        $redis->EXPIRE($code,3600);
    }else{
        echo &#39;weather.com.cn 连接超时&#39;;
    }
}
print_r($data);