php 抓取天气情况 www.weather.com.cn

<?php

print_r(getweather(101120501));

/**
* Server 天气情况获取函数
* @param unknown $city
*/
function getweather($city){
$url = "http://www.weather.com.cn/weather1d/".$city.".shtml";
$result = file_get_contents($url);
$result = explode("<li class='dn on' data-dn='todayT'>",$result);
$result = explode("<div class=\"m m2\" id=\"2_3d\">",$result[1]);
$result = mb_convert_encoding($result[0],"GBK","UTF-8");
$first = explode("<div class=\"slid\"></div>",$result);
//print_r($first);exit;
$w1 = get_we_info($first[0]);
$w2 = get_we_info($first[1]);
$week = mb_substr($w1[0],-2);
$arr['w_week']  = $week;
$arr['w_day1']  = trim($w1[1]);
$arr['w_day2']  = trim($w2[1]);
$arr['w_type1'] = trim($w1[2]);
$arr['w_type2'] = trim($w2[2]);
$arr['w_temperature1']= trim($w1[3]);
$arr['w_temperature2']= trim($w2[3]);
return $arr;
}
/**
* 每天的具体天气状况(今天 白天->今天 夜间)
* @param unknown $info
* @return string
*/
function get_we_info($info){
$w_info=explode("</h1>",$info);
$we_arr[0] = strip_tags($w_info[0]);
$w_info=explode("</h2>",$w_info[1]);
$we_arr[1] = strip_tags($w_info[0]);
$w_info = explode("<p class=\"tem\">",$w_info[1]);
$we_arr[2] = strip_tags($w_info[0]);
$w_info=explode("<i>",$w_info[1]);
//$w_info=explode("<p class=\"win\">",$w_info[1]);
$we_arr[3]=strip_tags($w_info[0]);
return $we_arr;
}

?>