PHP: sending apns inside socket server does not work? - php

Question

This week i experimented with php sockets but there is one thing that does not appear to work.
I want to send a Apple push notification (apns) from within a socket server. The socket server works fine but opening another socket to send a message to apns does not work.
The server socket script i use is similar to the example of php.net. (http://www.php.net/manual/en/sockets.examples.php) The script i use to send a apns notification is the following function:
function sendToAPNS($data, $deviceTokens, $pem, $password, $debug=0)
{
$server = ($debug == 1) ? 'gateway.sandbox.push.apple.com' : 'gateway.push.apple.com';
$ctx = stream_context_create();
stream_context_set_option($ctx, 'ssl', 'local_cert', '/home/testing/pushNotifications/'.$pem);
stream_context_set_option($ctx, 'ssl', 'passphrase', $password);
$fp = stream_socket_client('ssl://'. $server .':2195', $err, $errstr, 60, STREAM_CLIENT_CONNECT|STREAM_CLIENT_PERSISTENT, $ctx);
if (!$fp)
{
echo 'APNS error:'. $err .' '. $errstr ."\n";
return;
}
$body['aps'] = array('alert' => $data['message']);
foreach($data AS $key => $value)
{
if($key != 'message') $body['aps'][$key] = $value;
}
$payload = json_encode($body);
for($i = 0,$max=count($deviceTokens); $i < $max; $i++)
{
$msg = chr(0) . pack('n', 32) . pack('H*', $deviceTokens[$i]) . pack('n', strlen($payload)) . $payload;
$result = fwrite($fp, $msg, strlen($msg));
if (!$result)
BPLog('Message['. $data['ID'] .'] not delivered to '. $deviceTokens[$i] .': '. PHP_EOL);
// ob_flush();
// flush();
}
fclose($fp);
return true;
}
The following warnings are displayed:
PHP Warning: stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages:
error:14094410:SSL routines:func(148):reason(1040) in /home/testing/pushNotifications/index.php on line 162
Warning: stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages:
error:14094410:SSL routines:func(148):reason(1040) in /home/testing/pushNotifications/index.php on line 162
PHP Warning: stream_socket_client(): Failed to enable crypto in /home/testing/pushNotifications/index.php on line 162
Warning: stream_socket_client(): Failed to enable crypto in /home/testing/pushNotifications/index.php on line 162
PHP Warning: stream_socket_client(): unable to connect to ssl://gateway.push.apple.com:2195 (Unknown error) in /home/testing/pushNotifications/index.php on line 162
Warning: stream_socket_client(): unable to connect to ssl://gateway.push.apple.com:2195 (Unknown error) in /home/testing/pushNotifications/index.php on line 162
The function works in an other environment though. I have tested it in a php file that can be called from the browser and it sends like it should. I use absolute paths for the certificates so that could not be the problem.
Maybe there is a difference in php since the socket server is called from the commandline. Or maybe it simply is not possible to open another socket stream from within a socket server?
Does anyone have an idea of what the problem can be?