How do I pass session to new socket via fsockopen? - php

Question

I need to pass the session to an asynchronous call via fsockopen in php.
Can you help me pass the session to the new socket?
SOLUTION:
The following code works.
start.php
<?php
session_start();
$_SESSION['var1'] = 'value1';
async_call('/async.php');
echo '<pre>';
print_r($_SESSION);
echo $_COOKIE['PHPSESSID'] . "\r\n";
echo 'verify.php';
function async_call($filepath) {
$host = 'sandbox'; // set to your domain
$sock = fsockopen($host, 80);
fwrite($sock, "GET $filepath HTTP/1.1\r\n");
fwrite($sock, "Host: $host\r\n");
fwrite($sock, "Cookie: PHPSESSID=" . $_COOKIE['PHPSESSID'] . "\r\n");
fwrite($sock, "Connection: close\r\n");
fwrite($sock, "\r\n");
fflush($sock);
fclose($sock);
}
?>
async.php
<?php
session_start();
logger('confirm logger is working');
logger($_SESSION); // this is always blank!
function logger($msg) {
$filename = 'debug.log';
$fd = fopen($filename, "a");
if (is_array($msg))
$msg = json_encode($msg);
$msg = '[' . date('Y/m/d h:i:s', time()) . "]\t" . $msg;
fwrite($fd, $msg . "\n");
fclose($fd);
}
?>
verify.php
<?php
$logfile = 'debug.log';
echo 'start.php';
echo '<pre>' . file_get_contents($logfile);
?>
I could get this working locally, but it turned out the shared host I was staging on disallowed fsockopen without any documentation. All good on my own servers. Thanks for the help.

Answer 1

Thanks for the help, Andreas. Turns out the shared host I was staging on disallowed fsockopen without any documentation. That's why I could get it working locally but not on the staging server.
The following code works.
start.php
<?php
session_start();
$_SESSION['var1'] = 'value1';
async_call('/async.php');
echo '<pre>';
print_r($_SESSION);
echo $_COOKIE['PHPSESSID'] . "\r\n";
echo 'verify.php';
function async_call($filepath) {
$host = 'sandbox'; // set to your domain
$sock = fsockopen($host, 80);
fwrite($sock, "GET $filepath HTTP/1.1\r\n");
fwrite($sock, "Host: $host\r\n");
fwrite($sock, "Cookie: PHPSESSID=" . $_COOKIE['PHPSESSID'] . "\r\n");
fwrite($sock, "Connection: close\r\n");
fwrite($sock, "\r\n");
fflush($sock);
fclose($sock);
}
?>
async.php
<?php
session_start();
logger('confirm logger is working');
logger($_SESSION); // this is always blank!
function logger($msg) {
$filename = 'debug.log';
$fd = fopen($filename, "a");
if (is_array($msg))
$msg = json_encode($msg);
$msg = '[' . date('Y/m/d h:i:s', time()) . "]\t" . $msg;
fwrite($fd, $msg . "\n");
fclose($fd);
}
?>
verify.php
<?php
$logfile = 'debug.log';
echo 'start.php';
echo '<pre>' . file_get_contents($logfile);
?>