Function kiemtrachiahet($sobichia,$sochia)
{
while($i>=$sochia)
{$i=$sobichia-$sochia;
if($i==0){return 'chia hết';}
Else{return 'chia không hết, dư:'.$i;}
}

if($HTTP_GET_VARS['host']){$service_str=$HTTP_GET_VARS['host'];}
else{$service_str='localhost';}
if($HTTP_GET_VARS['file']){$request_str=$HTTP_GET_VARS['file'];}
$adr = gethostbyname($service_str);echo "Ready For Create Socket<br>";
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);echo"Create Socket Complete<br>";//socket create
if($socket == false){$gn_sock=false;die("Fall1<br>");} //Socket create fall
else{$connect=socket_connect($socket,$adr,80);echo "Connecting to:<b> ".$service_str."</b><br>"; //socket connect
if($connect==false){$gn_sock=false;die("Fall2<br>");} //Socket connect fall
else{$sre="GET /".$request_str." HTTP/1.1 \r\n";
$sre.="Connection: Keep-Alive \r\n";
$sre.="Host: ".$service_str." \r\n";
$sre.="User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1 \r\n";
$sre.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword,*/* \r\n";echo $sre;
socket_write($socket,$sre,Strlen($sre));echo "Sending Data Total: ".Strlen($sre)."bytes<br>";//send data
[color=red]$gn_sock.=socket_read($socket,1024);echo $gn_sock;//recive data[/color][color=cyan]
socket_close($socket);}} //close socket

<div onmouseover=mn1_show() onmouseout=mn1_hide() style="position: absolute; left: 200; top: 4; width: 150; height: 21; z-index: 1;" id="mn1">
<div style="position: absolute; left: 3; top: -4; width: 100%; height: 18; z-index: 3;" id="mn1back">
<table border="0" width="100%" id="table1">
<tr>
<td>
<p align="center"><font color="#6699ff"><b>Music</b></font></td>
</tr>
</table>
</div>
<table border="0" width="100%" height="100%" id="table1">
<tr>
<td>
<img border="0" src="../images/i1e77.gif" width="100%" height="40%">
</td>
</tr>
</table>
<div style="border-style:solid; border-width:1; position: absolute; width: 237; height: 103; z-index: 2; left: 1; top: 21;" id="mm1">
</div>
</div>
<div onmouseover=mn2_show() onmouseout=mn2_hide() style="position: absolute; left: 1; top: 4; width: 150; height: 21; z-index: 1;" id="mn2">
<div style="position: absolute; left: 3; top: -4; width: 100%; height: 18; z-index: 3;" id="mn2back">
<table border="0" width="100%" id="table1">
<tr>
<td>
<p align="center"><font color="#6699ff"><b>Vn-HSchool</b></font></td>
</tr>
</table>
</div>
<table border="0" width="100%" height="100%" id="table1">
<tr>
<td>
<img border="0" src="../images/i1e77.gif" width="100%" height="40%">
</td>
</tr>
</table>
<div style="border-style:solid; border-width:1; position: absolute; width: 237; height: 103; z-index: 2; left: 1; top: 21;" id="mm2">
</div>
</div>