Bug #70122 [Opn->Fbk]: stream_select() modifies array incorrectly if openssl is enabled

Edit report at https://bugs.php.net/bug.php?id=70122&edit=1 ID: 70122 Updated by: cmb@php.net Reported by: jake dot zatecky at gmail dot com Summary: stream_select() modifies array incorrectly if openssl is enabled -Status: Open +Status: Feedback Type: Bug Package: Streams related Operating System: Windows 7/Windows Server 2008 PHP Version: 5.6.11 -Assigned To: +Assigned To: cmb Block user comment: N Private report: N New Comment: Works for me as expected on Windows 10 with current PHP 7.3 and 7.4. Can you still reproduce the issue with any of the actively supported PHP versions[1]? [1] <https://www.php.net/supported-versions.php> Previous Comments: ------------------------------------------------------------------------ [2015-07-23 23:47:55] jake dot zatecky at gmail dot com Description: ------------ I have determined that the stream_select() function modifies the $read variable incorrectly when php_openssl is loaded in more recent versions of PHP. For example, when running a listener with PHP 5.6.11 on port 8000 and using telnet, stream_select() returns the correct number of streams that received connection (1), but both the $read and $write arrays returned are in fact empty. This issue disappears if php_openssl is not loaded, or if you use PHP 5.6.6 (x64 thread-safe). There are several related bugs, but it would appear that they address different issues. I have verified this issue occurs identically on both PHP 5.6.9 and PHP 5.6.11 on a Windows 7 machine and Server 2008 R2 machine; it may occur on other operating systems as well. Both versions are 64bit and thread-safe. I used the same .ini configuration on each of the three versions. See the test code below to reproduce this behavior. Make sure php_openssl.dll is loaded, run the PHP listener, and telnet the localhost port. E.g.: $ php listener.php Then, in a separate terminal, run something similar to the following: $ telnet localhost 8000 Test script: --------------- <?php $socket = stream_socket_server('tcp://0.0.0.0:8000', $errno, $errstr); stream_set_blocking($socket, 0); if (!$socket) { echo "$errstr ($errno)\n"; } else { $read = [$socket]; $write = []; $except = null; $num = stream_select($read, $write, $except, null, null); // On PHP 5.6.9/5.6.11: int(1) and array(0) {} // On PHP 5.6.6 : int(1) and array(1) { [0] => ... } var_dump($num, $read); fclose($socket); } Expected result: ---------------- The $read variable should contain one element: array(1) { [0]=> resource(5) of type (stream) } This is returned using PHP 5.6.6 or when openssl is disabled. Actual result: -------------- On PHP 5.6.9 and PHP 5.6.11, when openssl is loaded, the following is outputted instead: int(1) array(0) { } ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=70122&edit=1