PHP use the interface of wanwang to realize the domain name query function

Today to do a website for others when a demand is to have a domain name query function, looking up some information wrote a simple query function
The front page USES checkbox, and the code is as follows:

 
<form name="form1" method="post" action="chaxun.php"> 
<tbody><tr> 
<td align="right" valign="middle" width="251"> 
<p align="center"> 
<img border="0" src="./templates/img/www.gif"><input name="dns" type="text" id="dns" size="20" style="background-color: #C0C0C0"></p></td> 
<td style="padding-top:11px;" valign="top" width="99"> 
<!-- 
<input type="image" src="./templates/img/cx.gif" align="left" onclick="submit()" width="50" height="18"> 
--> 
<input type="submit" value=" The query "/> 
</td> 
</tr> 
<tr> 
<td colspan="2" align="left" valign="top" style="padding-left:12px;"> 
<table width="96%" border="0" cellspacing="0" cellpadding="0" height="94%"> 
<tbody><tr> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="com" checked="">.com</td> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="cn" checked="">.cn</td> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="tel" checked="">.tel</td> 
</tr> 
<tr> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="mobi">.mobi</td> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="net" checked="">.net</td> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="org">.org</td> 
</tr> 
<tr> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="asia">.asia</td> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="me">.me</td> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="com.cn" checked="">.com.cn</td> 
</tr> 
<tr> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="net.cn">.net.cn</td> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="org.cn">.org.cn</td> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="gov.cn">.gov.cn</td> 
</tr> 
<tr> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="hk">.hk</td> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="tv">.tv</td> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="biz">.biz</td> 
</tr> 
<tr> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="cc">.cc</td> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="name">.name</td> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value="info">.info</td> 
</tr> 
<tr> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value=" The company ">. The company </td> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value=" network ">. network </td> 
<td align="left" width="76"><input name="ext[]" type="checkbox" id="ext" value=" China ">. China </td> 
</tr> 
</tbody></table></td> 
</tr> 

</tbody> 
</form> 

PHP code:

 
<?php 

// Get a top-level domain  
$ext=$_POST['ext']; 
// get 2 Level of the domain name  
$dns = $_POST['dns']; 

//print_r($ext); 
//$domain = $dns . "." . $ext[0]; 
//echo $domain; 

// Go through all the domain names  
foreach ($ext as $value) { 
// Combination of the domain name  
$domain = $dns . "." . $value; 

// Query:  
echo $domain ; 

$do = "http://panda.www.net.cn/cgi-bin/check.cgi?area_domain=" . $domain; 
$xml_data = file_get_contents($do); 
$result_arr = (array) simplexml_load_string($xml_data); 

$returncode=$result_arr['returncode']; 
$key=$result_arr['key']; 

$original=$result_arr['original']; 

$status= substr($original,0,3); 

if($status=="210"){ 

echo " : congratulations to you , You can register "; 

}else if($status=="211"){ 

echo " : registered "; 

}else if($status=="212"){ 

echo " : parameter error "; 

} 
echo '<br>'; 

} 

?>