Обьясните пожалуйста что делает этот кусок кода
function use_fsockopen($url, $querystring)
{
if (!function_exists('fsockopen')) { return false; }
$url=parse_url($url);
$fp=@fsockopen($url['host'], $this->remote_port, $errno, $errstr, $this->remote_timeout);
if (!$fp) { return false; }
$header="POST {$url['path']} HTTP/1.0\r\n";
$header.="Host: {$url['host']}\r\n";
$header.="Content-type: application/x-www-form-urlencoded\r\n";
$header.="User-Agent: Superliver (http://superliver.ru)\r\n";
$header.="Content-length: ".@strlen($querystring)."\r\n";
$header.="Connection: close\r\n\r\n";
$header.=$querystring;
$result=false;
fputs($fp, $header);
while (!feof($fp)) { $result.=fgets($fp, 1024); }
fclose ($fp);
if (strpos($result, '200')===false) { return false; }
$result=explode("\r\n\r\n", $result, 2);
if (!$result[1]) { return false; }
return $result[1];
}
/**
* Pass the access details in using cURL
*
* @param string $url
* @param string $querystring
* @return string|boolean string on success; boolean on failure
*/
function use_curl($url, $querystring)
{
if (!function_exists('curl_init')) { return false; }
$curl = curl_init();
$header[0] = "Accept: text/xml,application/xml,application/xhtml+xml,";
$header[0] .= "text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
$header[] = "Cache-Control: max-age=0";
$header[] = "Connection: keep-alive";
$header[] = "Keep-Alive: 300";
$header[] = "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7";
$header[] = "Accept-Language: en-us,en;q=0.5";
$header[] = "Pragma: ";
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_USERAGENT, 'Superliver (http://superliver.ru)');
curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
curl_setopt($curl, CURLOPT_ENCODING, 'gzip,deflate');
curl_setopt($curl, CURLOPT_AUTOREFERER, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $querystring);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, $this->remote_timeout);
curl_setopt($curl, CURLOPT_TIMEOUT, $this->remote_timeout); // 60
$result= curl_exec($curl);
$info=curl_getinfo($curl);
curl_close($curl);
if ((integer)$info['http_code']!=200) { return false; }
return $result;
}
Средний