//全国,判断条件是$REQUEST_URI是否含有html
if (!strpos($_SERVER["REQUEST_URI"],".html"))
{
$page="http://qq.ip138.com/weather/";
$html = file_get_contents($page,'r');
$pattern="/全国主要城市、县当天和未来五天天气趋势预报在线查询(.*?)
//正则匹配之间的html
preg_match($pattern,$html,$pg);
echo "";
//正则替换远程地址为本地地址
$p=preg_replace('//weather/(w+)/index.htm/', 'tq.php/$1.html', $pg[1]);
echo $p;
}
//省,判断条件是$REQUEST_URI是否含有?
else if(!strpos($_SERVER["REQUEST_URI"],"?")){
//yoyo推荐的使用分割获得数据,这里是获得省份名称
$province=explode("/",$_SERVER["REQUEST_URI"]);
$province=explode(".",$province[count($province)-1]);
$province=$province[0];
//被注释掉的是我自己写出来的正则,感觉写的不好,但效果等同上面
//preg_match('/[^/]+[.(html)]$/',$_SERVER["REQUEST_URI"],$pro);
//$province=preg_replace('/.html/','',$pro[0]);
$page="http://qq.ip138.com/weather/".$province."/index.htm";
//获取html数据之前先尝试打开页面,防止恶意输入地址导致出错
if (!@fopen($page, "r")) {
die("对不起,该地址不存在!点击这里返回");
exit(0);
}
$html = file_get_contents($page,'r');
$pattern="/五天天气趋势预报(.*?)请输入输入市/si";
preg_match($pattern,$html,$pg);
echo "";
//正则替换,获取省份,城市
$p=preg_replace('//weather/(w+)/(w+).htm/', '$2.html?pro=$1', $pg[1]);
echo $p;
}
else {
//市,通过get传递省份
$pro=$_REQUEST['pro'];
$city=explode("/",$_SERVER["REQUEST_URI"]);
$city=explode(".",$city[count($city)-1]);
$city=$city[0];
//preg_match('/[^/]+[.(html)]+[?]/',$_SERVER["REQUEST_URI"],$cit);
//$city=preg_replace('/.html?/','',$cit[0]);
$page="http://qq.ip138.com/weather/".$pro."/".$city.".htm";
if (!@fopen($page, "r")) {
die("对不起,该地址不存在!点击这里返回");
exit(0);
}
$html = file_get_contents($page,'r');
$pattern="/五天天气趋势预报(.*?)请输入输入市/si";
preg_match($pattern,$html,$pg);
echo "";
//获取真实的图片地址
$p=preg_replace('//image//', 'http://qq.ip138.com/image/', $pg[1]);
echo $p;
}
?>

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