抓取最近八天天气(非利用接口，直接从网站提取)代码,PHP代码库,德仔网

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【PHP】抓取最近八天天气(非利用接口，直接从网站提取)

作者:技术[S.T] / 发布于2012/10/8/ 711

<div><?php
 /*
 *特别注意，第一天没有最高气温数据，第八天没有最低气温数据
 *注意对数字进行过滤时不要忘记对负号进行判断
 *对风力过滤时要考虑到3-5级这种格式
 *http://blog.qita.in
 class weatherfetch{
 private $f;
 function getNum($string) {
 $tmpstr = '';
 $strlen = strlen($string);
 for($i=0; $i<$strlen; $i++) {
 $str=substr($string, $i, 1);
 $str1=trim($str);
 if(is_numeric($str1)){
 $tmpstr.=$str1+0;

 }
 if($str1=="-"&&is_numeric(substr($string, $i-1, 1))){
 $tmpstr.= $str1;
 }

 }
 return $tmpstr;
 }
 function __construct(){
 $this->f= new SaeFetchurl();

 }
 function getChineseNum($string){
 $tmpstr = '';
 $arr = array(1,2,3,4,5,6,7,8,9,0);
 $strlen = strlen($string);
 for($i=0; $i<$strlen; $i++) { 

 $str=substr($string, $i, 1);

 $str1=trim($str);
 if( ord($str)>0xA0 ){

 $tmpstr.= substr($string, $i, 3);

 $i = $i+2;

 }

 if(is_numeric($str1)){

 $tmpstr.= $str1;

 }
 if($str1=="-"&&is_numeric(substr($string, $i-1, 1))&&is_numeric(substr($string, $i+1, 1))){
 $tmpstr.= $str1;
 }

 }

 return $tmpstr;

 }
 function getChinese($string,$encode="GBK") {
 switch($encode){
 case "GBK" :$codelength=2;break;
 case "GB2312" :$codelength=3;break;
 case "UTF-8" :$codelength=3;break;
 case "UTF-16" :$codelength=4;break;

 }
 $tmpstr = '';
 $arr = array(1,2,3,4,5,6,7,8,9,0);
 $strlen = strlen($string);
 for($i=0; $i<$strlen; $i++) {
 $str=substr($string, $i, 1);
 $str1=trim($str);
 if( ord($str)>0xA0 ){
 $tmpstr.= substr($string, $i, $codelength);
 $i = $i+$codelength-1;
 }

 }
 return $tmpstr;
 }
 function get($cityid){
 $url="<a href="http://www.weather.com.cn/weather/".$cityid.".shtml">http://www.weather.com.cn/weather/".$cityid.".shtml</a>";
 $data=$this->f->fetch($url);

 $sun=explode('<div class="weatherTopright">',$data);
 $sun=explode("<dl>",$sun[1]);
 $sun=explode("</dl>",$sun[1]);
 $sun=explode("</strong>",$sun[0]);
 $sunrise=strlen($sun[0]);
 $sunrise=substr($sun[0],$sunrise-5);//日出时间
 $sunset=strlen($sun[1]);
 $sunset=substr($sun[1],$sunset-5);//日落时间
 $sunhour=substr($sunset,0,2)-substr($sunrise,0,2);
 $sunminute=$sunhour*60+substr($sunset,-2)-substr($sunrise,-2);//日照时间
 $yubao=explode('class="yuBaoTable"',$data);
 $num=count($yubao);
 $tl=array();
 $th=array();
 $fx=array();
 $fl=array();
 $weather=array();
 //第一天
 $tr=explode("</tr>",$yubao[1]);
 $td=explode("</td>",$tr[0]);
 $weather[]=$this->getChinese($td[3],"UTF-8");//晚上天气
 $fx[]=$this->getChinese($td[5],"UTF-8");//晚上风向
 $fl[]=substr($this->getChineseNum($td[6],"UTF-8"),5);//晚上风力
 $tltemp=explode("<strong>",$td[4]);//最低气温
 $tl[]=$this->getNum($tltemp[1]);
 //从第二天到第七天
 for($i=2;$i<$num-1;$i++){
 $tr=explode("</tr>",$yubao[$i]);
 $td=explode("</td>",$tr[0]);
 $weather[]=$this->getChinese($td[3],"UTF-8");//白天天气
 $fx[]=$this->getChinese($td[5],"UTF-8");//白天风向
 $fltemp=substr($this->getChineseNum($td[6],"UTF-8"),5);
 $fl[]=$fltemp;//白天风力
 $thtemp=explode("<strong>",$td[4]);
 $th[]=$this->getNum($thtemp[1]);//最高气温
 $td=explode("</td>",$tr[1]);
 $tltemp=explode("<strong>",$td[3]);
 $tl[]=$this->getNum($tltemp[1]);//最低气温

 }
 //第八天
 $tr=explode("</tr>",$yubao[$num-1]);
 $td=explode("</td>",$tr[0]);
 $weather[]=$this->getChinese($td[3],"UTF-8");//白天天气
 $fx[]=$this->getChinese($td[5],"UTF-8");//白天风向
 $fl[]=substr($this->getChineseNum($td[6],"UTF-8"),5);//白天风力
 $thtemp=explode("<strong>",$td[4]);
 $th[]=$this->getNum($thtemp[1]);//最高气温
 if(count($weather)==8){
 return array("weather"=>$weather,"tl"=>$tl,"th"=>$th,"fx"=>$fx,"fl"=>$fl,"sunset"=>$sunset,"sunrise"=>$sunrise,"sunminute"=>$sunminute);
 }else{
 return 1;

 }
 }
 function getday1($cityid){
 $url="<a href="http://www.weather.com.cn/weather/".$cityid.".shtml">http://www.weather.com.cn/weather/".$cityid.".shtml</a>";
 $data=$this->f->fetch($url);
 $yubao=explode('class="yuBaoTable"',$data);
 $tr=explode("</tr>",$yubao[1]);
 $td=explode("</td>",$tr[0]);
 $thtemp=explode("<strong>",$td[4]);
 return $this->getNum($thtemp[1]);

 }
 }

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