continue processing php after sending http response

by

Yes. You can do this:

ignore_user_abort(true);//not required
set_time_limit(0);

ob_start();
// do initial processing here
echo $response; // send the response
header('Connection: close');
header('Content-Length: '.ob_get_length());
ob_end_flush();
@ob_flush();
flush();
fastcgi_finish_request();//required for PHP-FPM (PHP > 5.3.3)

// now the request is sent to the browser, but the script is still running
// so, you can continue...

die(); //a must especially if set_time_limit=0 is used and the task ends

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