php fetching page using http post - php

Question

I have to fetch exam results from the page http://cbseresults.nic.in/class1211/cbse122012.htm
Sampleroll number is 4623447.
They are using http post to post the form data.I wrote the following code to post data.But it is not providing the needed results.I am posting the needed cookies and post variables.But still I am not getting the output.What change should I make for send_post function,so that it will be working.Here is my code
echo cbse12_data_extractor(4623447);
function cbse12_data_extractor($regNo) {
$source_url = 'http://cbseresults.nic.in/class1211/cbse122012.asp';
$post_vars = array('regno'=>$regNo);
$cookies = array('_tb_pingSent'=>1);
// $extraHeaders = array('Host'=>'http://cbseresults.nic.in');
return send_post($source_url,$post_vars,$cookies);
}
function send_post( $url, $data ,$cookies='',$extraHeaders = '') //sends data array(param=>val,...) to the page $url in post method and returns the reply string
{
$post = http_build_query( $data );
$header = "Accept-language: en\r\n".
"Content-Type: application/x-www-form-urlencoded\r\n" .
"Content-Length: " . strlen( $post ) .
"\r\nUser-agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)\r\n";
if($extraHeaders) {
foreach($extraHeaders as $headerN => $val) {
$header = $header.$headerN.': '.$val."\r\n";
}
}
if($cookies) {
$cookieArr = array();
foreach($cookies as $cookie => $value) {
array_push($cookieArr,$cookie.'='.$value);
}
$cookieStr = "Cookie: ".implode('; ',$cookieArr)."\r\n";
$header = $header.$cookieStr;
}
$context = stream_context_create( array(
"http" => array(
"method" => "POST",
"header" => $header,
"content" => $post
)
) );
//echo $header;
$page = file_get_contents( $url, false, $context );
return $page;
}

Answer 1

You can' send POST data using file_get_contents. Use CURL for this task
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS,your_parameters);
// receive server response ...
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$server_output = curl_exec ($ch);