Hi,

I don't reproduce this. Probably need a more reliable reproduce case, or you should check your environment. In the PHP code, checking that the returned socket is valid before select should be done, too.

Thanks.

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Updated test script:
<?php
$timeout = 15;

$socket = fsockopen("www.google.com",80,$errno,$errstr,$timeout);
var_dump($socket);
if(!$socket) { 
	echo "Error: bad socket\n"; 
}
else {
	fwrite($socket, "GET / HTTP/1.0\r\n\r\n");
	echo fgets($socket);
	fclose($socket);
}

echo "<br>\n";

$socket = fsockopen("www.google.com",80,$errno,$errstr,$timeout);
var_dump($socket);
if(!$socket) { 
	echo "Error: bad socket\n"; 
}
else {
	$sock_r = null;
	$sock_w = array($socket);
	$sock_e = null;
	$result = stream_select($sock_r,$sock_w,$sock_e,$timeout);
	var_dump($result);
	fwrite($socket, "GET / HTTP/1.0\r\n\r\n");
	echo fgets($socket);	
	fclose($socket);
}

-----

Current output:
C:\php>php bug.php
resource(4) of type (stream)
HTTP/1.0 200 OK
<br>
resource(5) of type (stream)

Warning: stream_select(): unable to select [2]: No such file or directory (max_f
d=300) in C:\php\bug.php on line 26
bool(false)
HTTP/1.0 200 OK

-----

PHP version:
C:\php>php -v
PHP 5.6.12 (cli) (built: Aug  6 2015 12:05:19)

I uninstalled the Security Suite software to ensure it was not related to that.  Still have the same issue.

If this is an environment issue, what things should I be looking for?

I will also take a copy of this home and test it there.

Updated test script:
<?php
$timeout = 15;

$socket = fsockopen("www.google.com",80,$errno,$errstr,$timeout);
var_dump($socket);
if(!$socket) { 
	echo "Error: bad socket\n"; 
}
else {
	fwrite($socket, "GET / HTTP/1.0\r\n\r\n");
	echo fgets($socket);
	fclose($socket);
}

echo "<br>\n";

$socket = fsockopen("www.google.com",80,$errno,$errstr,$timeout);
var_dump($socket);
if(!$socket) { 
	echo "Error: bad socket\n"; 
}
else {
	$sock_r = null;
	$sock_w = array($socket);
	$sock_e = null;
	$result = stream_select($sock_r,$sock_w,$sock_e,$timeout);
	var_dump($result);
	fwrite($socket, "GET / HTTP/1.0\r\n\r\n");
	echo fgets($socket);	
	fclose($socket);
}

-----

Current output:
C:\php>php bug.php
resource(4) of type (stream)
HTTP/1.0 200 OK
<br>
resource(5) of type (stream)

Warning: stream_select(): unable to select [2]: No such file or directory (max_f
d=300) in C:\php\bug.php on line 26
bool(false)
HTTP/1.0 200 OK

-----

PHP version:
C:\php>php -v
PHP 5.6.12 (cli) (built: Aug  6 2015 12:05:19)

I uninstalled the Security Suite software to ensure it was not related to that.  Still have the same issue.

If this is an environment issue, what things should I be looking for?

I will also take a copy of this home and test it there.

Ran the latest bug script on my home computer.  I did not encounter the error.  The output:
C:\PHP56>php bug.php
resource(4) of type (stream)
HTTP/1.0 200 OK
<br>
resource(5) of type (stream)
int(1)
HTTP/1.0 200 OK

C:\PHP56>php -v
PHP 5.6.13 (cli) (built: Sep  3 2015 15:13:29)
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies


Since this is 5.6.13 and not 5.6.12, I'm going to download a copy of 5.6.12 to see if I can recreate this issue.  If not, I am going to try to identify what is happening on my work system as I have seen a few similar errors and I'm wondering if they are antivirus related.

I just tried the test script with PHP 5.6.12 on my Win10 computer at home and it works fine.  I'm closing this ticket; it is the work environment.  I will do a little digging to see if I can identify what on the computer is causing PHP to not operate correctly.