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一个显示天气预报的程序

WBOY
Release: 2016-06-13 12:43:08
Original
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刚开始学PHP,先编写了一个程序,放在自己的主页上,可以显示天气预报,当然还很不完善,希望大家给提意见。程序如下:

$fcont=file("http://www.bjmb.gov.cn/today.asp");
$arr=array();
for($i=0;$i    $tmp=$fcont[$i];
    $tmp=ereg_replace("
"," ",$tmp);
    if(!strstr(strtolower($tmp),"img")){
        $tmp=trim(strip_tags($tmp));
    } else {
        $st=ereg_replace(">⌒        $stt=split("⌒",$st);
        foreach($stt as $key => $value){
            if(strstr($value,"img") ){
                $tmp=$value;
                $tmp=ereg_replace("src=","width=30 height=30 align=absmiddle src=",$tmp);
                if(strstr($tmp,"bt9.jpg") || strstr($tmp,"colline.gif")) $tmp="";
            }
        }
    }
    if(trim($tmp)!="" && trim($tmp)!=" ") $arr[]=$tmp;
}
$yb=array();
for($i=2;$i    $yb[]=$arr[$i];
}
?>



本来获取的语句只需要执行一次,然后将获取的数据和旧数据比较,是否是新的,如果是新的,替换掉旧数据,否则,不替换。这是有规律可寻的,先判断时间,一般比预报时间晚一个小时的话,肯定可以获取最新的预报数据了。不过现在我没有考虑那么多,以后再说吧!

source:php.cn
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