Example code to reproduce SSL socket stream bug, which causes it to hang and use 100% CPU

stream_test.php

<?php

ini_set('max_execution_time', 10);

$url = 'ssl://gateway.sandbox.push.apple.com:2195';
$ssl = [
    'local_cert' => 'path/to/valid/apns_sandbox.pem',
];

$sock = stream_socket_client(
    $url,
    $errno,
    $errstr,
    ini_get('default_socket_timeout'),
    STREAM_CLIENT_CONNECT,
    stream_context_create(array(
        'ssl' => $ssl,
    ))
);

// this setting makes it use 100% cpu until timeout
// without this it also hangs until timeout, but doesn't use 100% cpu
stream_set_blocking($sock, 0);

$data = null;
if (!feof($sock)) {
    $data = fread($sock, 1024);
}

var_dump($data);

Expected result:

string(0) ""

Actual result:

Fatal error: Maximum execution time of 10 seconds exceeded in /tmp/stream_test.php on line 27

Call Stack:
    0.0001     233600   1. {main}() /tmp/stream_test.php:0
    0.4907     236528   2. fread() /tmp/stream_test.php:27

So far, only been able to reproduce with PHP 5.6.7 on Ubuntu 14.04. Works fine on CentOS with PHP 5.4, 5.5 and 5.6.

I'm working on this today. Will update the actual bug report when fixed.

This should now be corrected upstream as noted in the original bug report