Get information on the city day of the Sina Weather Report page.
A total of two files:
Tianqi.html: Use the drop-down menu to jump to the web to get weather forecast information, return information to the floating frame;
<script>
<!--
function Go () {
var url2= ' http://php.weather.sina.com.cn/search.php?city= '
window.status= ' search in ... '; Hide Status bar Information
var A=document.form.city.selectedindex;
var City1=document.form.city.options[a].value;
Document.form.url.value=url2+city1;
Window.location=url+city1;
Document.form.submit ();
}
-
</script>
<body>
<center>
<iframe width= "height=" name= "Frame" src= "get_tianqi.php" frameborder= "1" ></iframe>
<form action= "get_tianqi.php" method= "post" name= "form" target= "Frame" >
<select name= "City" onchange= "Go ()" >
<option value= "" > Please select a city </option>
<option value= "guangzhou" > Guangzhou </option>
<option value= "Zhaoqing" > Zhaoqing </option>
<option value= "Zhanjiang" > Zhanjiang </option>
<option value= "Shenzhen" > Shenzhen </option>
<option value= "Dongguan" > Dongguan </option>
<input type= "hidden" name= "url" value= "" >
</select>
</form>
</center></body>
get_tianqi.php: Get weather information
<?php
/* This program is to get a weather forecast for a city from the Sina Web Weather page http://php.weather.sina.com.cn/search.php?city= */
Ob_start (); Start output buffering
function Request_url ($url,$method= ' POST ') {
= Parse_url (.) Parse URL address, get host,path,port,query, etc.
if (!$url) return "couldn ' t parse url";
if (!isset ($url[' Port ')) {$url[' port '] = "";}
if (!isset ($url[' query ')) {$url[' query '] = "";}
Connecting to a server
$fp = Fsockopen ($url[' host '), $url[' Port ']? $url[' Port ': 80);
if (!$FP) return "Cannot connect". $url[' host '. " Server ";
Send Request
Fputs ($FP, sprintf ("$method%s%s%s http/1.0\n", $url[' path '], $url[' query ')? "?": "", $url[' query '));
Fputs ($FP, "Host: $url[host]\n");
Fputs ($fp, "content-type:application/x-www-form-urlencoded\n");
Fputs ($fp, "connection:close\n\n");
What to return after getting the request
$line = fgets ($fp,1024);
if (!eregi ("^http/1\. ($line)) return;
$results = "";
while (!feof ($fp)) {
$line = fgets ($fp,1024);
$results. = $line;
}
Fclose ($FP);
return $results;
}
Get URLs sent from other pages (with query strings)
if (!$_request[' URL ')} {
echo "Please add a URL";
Exit
}else{
$url=$_request[' url '];
}
$content=request_url (); Web page content After the request is made
$start=strpos ($content, "<!--weather conditions Begin--");//Get the Intercept section of the weather forecast
$end=strpos ($content, "<!--weather conditions end----");
$len=$end-$start;
$b=substr ($content,$start,$len); Intercept to get the specified content
Capture the city's today's weather forecast from the Intercept section above
$sub_start=strpos ($b, "<div class=\" City_data\ ">");
$sub_end=strpos ($b, "<div class=\" weather_sm\ ">");
$len2=$sub_end-$sub_start;
$c=substr ($B,$SUB_START,$LEN2);
$d=split ("\ n", $c); Remove line break
Print_r ($d);
$e= "";
foreach ($d as $key=>$value) {
$value=strip_tags ($value); Remove HTML tags
$e.=$value;
if ($key==2) {
$e.= "<br>";
}
}
Echo $e;
Ob_end_flush ();
?>
