<?php
*************************************************************************/
@header(“Content-Type:text/html;charset=gb2312”);
error_reporting(0);
/*******************看weather.txt的修改时间是否为当天,如果是昨天的就要上网抓结果***********/
$tmp = filemtime(“weather.txt”);
$tt1=date(“Ymd”,$tmp).”<br>”;
$tt2=date(“Ymd”);
if ($tt1<$tt2) {
//echo “要抓结果”;
unlink(“weather.txt”);
$url = “http://php.weather.sina.com.cn/search.php?city=广州” ;
$content = file_get_contents($url);
preg_match_all(‘/<div>(.+?)</DIV>/si’,$content,$result);
for($i=0;$i<2;$i++){
$x= strip_tags($result[1][$i]).”n”;
$handle = fopen (“weather.txt”, “a”);
fwrite($handle, $x);
fclose($handle);
}
listweather();
} else {
// echo “直接从weather.txt读结果”;
listweather();
}
//天气显示函数
function listweather() {
$filename=”weather.txt”;
$handle=fopen($filename,”r”);
if ($handle) {
$contents=fread($handle,filesize($filename));
fclose($handle);
$cc=explode(“n”,$contents);
$today=explode(” “,$cc[0]);
$tomo=explode(” “,$cc[1]);
?>
<meta http-equiv=”Content-Type” content=”text/html; charset=gb2312″>
<table width=”200″ height=”85″ cellspacing=”0″ bordercolordark=”#FFFFFF” bordercolorlight=”#000000″ border=”1″ align=”center” cellpadding=”2″>
<tr bgcolor=”#6b8ba8″ style=”color:FFFFFF”>
<td height=”22″ colspan=”3″>
<div align=”center”>未来48小时天气预报</div></td>
</tr>
<!–<tr bgcolor=”#0066FF”> –>
<tr >
<td width=”54″ height=”21″>
<div align=”center”><font style=”font-size=14px” color=”#000000″>时间</font></div></td>
<td width=”88″>
<div align=”center”><font style=”font-size=14px” color=”#000000″>天气情况</font></div></td>
<td width=”90″>
<div align=”center”><font style=”font-size=14px” color=”#000000″>温度℃</font></div></td>
</tr>
<tr >
<td height=”19″ >
<div align=”center”> <font style=”font-size=14px”>今天</font></div></td>
<td>
<div align=”center”><font style=”font-size=14px”><?php echo $today[0]?></font></div></td>
<td>
<div align=”center”><font style=”font-size=14px”><?php echo ereg_replace(“℃”,””,$today[1])?>℃</font></div></td>
</tr>
<tr>
<td height=”18″>
<div align=”center”><font style=”font-size=14px”>明天</font></div></td>
<td>
<div align=”center”><font style=”font-size=14px”><?php echo $tomo[0]?></font></div></td>
<td>
<div align=”center”><font style=”font-size=14px”><?php echo ereg_replace(“℃”,””,$tomo[1])?>℃</font></div></td>
</tr>
</table>
<?php
} else {
echo “无法读取天气记录!!n”;
}
}
?>