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云代码 - php代码库

php抓取天气预报（天气，气温，风力，日出日落...）

2012-10-22 作者： 程序猿style举报

[php]代码库

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/**
 *php抓取天气预报（天气，气温，风力，日出日落...）
 *
 *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
*/
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 )
    {
        $url="http://www.weather.com.cn/weather/".$cityid.".shtml";
        $data=$this->f->fetch ( $url );
 
        $sun=explode ( '
                       ',$data );
        $sun=explode ( "
                       ",$sun[1] );
        $sun=explode ( "
                       ",$sun[1] );
        $sun=explode ( "",$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
        $tr=explode ( "",$yubao[1] );
        $td=explode ( "",$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
        $tltemp=explode ( "",$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++ )
        {
            $tr=explode ( "",$yubao[$i] );
            $td=explode ( "",$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
            $thtemp=explode ( "",$td[4] );
            $th[]=$this->getNum ( $thtemp[1] );//最高气温
            $td=explode ( "",$tr[1] );
            $tltemp=explode ( "",$td[3] );
            $tl[]=$this->getNum ( $tltemp[1] );//最低气温
 
        }
        //第八天
        $tr=explode ( "",$yubao[$num-1] );
        $td=explode ( "",$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
        $thtemp=explode ( "",$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 )
    {
        $url="http://www.weather.com.cn/weather/".$cityid.".shtml";
        $data=$this->f->fetch ( $url );
        $yubao=explode ( 'class="yuBaoTable"',$data );
        $tr=explode ( "",$yubao[1] );
        $td=explode ( "",$tr[0] );
        $thtemp=explode ( "",$td[4] );
        return $this->getNum ( $thtemp[1] );
 
    }
}


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