Connection keep-alive problems

Question

I have a PHP script "A" that starts another PHP script "B", which runs up to 5 hours. I use the curl function for that. But my problem is that script "A" does not sure hold the connection to the script "B". I have changed the max_execution_time, timeout, socket-timeout, etc... but nothing helps.

Do I need to send a header to the script "B" with curl or something?

$curl_header[] = "Accept: text/xml,application/xml,application/xhtml+xml,text
/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
$curl_header[] = "Cache-Control: max-age=0";
$curl_header[] = "Connection: keep-alive";
$curl_header[] = "Keep-Alive: 84600"; 

$url = 'http://test.de/test_B.php';

$ch = curl_init();
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)');
curl_setopt($ch, CURLOPT_FRESH_CONNECT, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $curl_header); 
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 300);
curl_setopt($ch, CURLOPT_TIMEOUT, 84600);
curl_setopt($ch, CURLOPT_NOSIGNAL, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_URL, $url);
$result = curl_exec($ch);
$curl_errno = curl_errno($ch);
curl_close($ch);

`

Answer 1

If the script "B" takes long time to finish it could be useful to put during the execution some echo "something"; flush(); that mantain the connection alive.

It happens to me recently on a similar execution.