Bug->Doc #79166 [Asn->Ver]: Notices for read/write failures are not documented

From: Date: Mon, 27 Jan 2020 13:36:33 +0000
Subject: Bug->Doc #79166 [Asn->Ver]: Notices for read/write failures are not documented
References: 1  Groups: php.doc.bugs 
Request: Send a blank email to doc-bugs+get-17223@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=79166&edit=1

 ID:                 79166
 Updated by:         cmb@php.net
 Reported by:        michael dot piche at csrt dot ulaval dot ca
-Summary:            PHP 7.4 error with php://stderr
+Summary:            Notices for read/write failures are not documented
-Status:             Assigned
+Status:             Verified
-Type:               Bug
+Type:               Documentation Problem
 Package:            Streams related
 Operating System:   Windows
-PHP Version:        7.4.2
+PHP Version:        7.4
 Assigned To:        cmb
 Block user comment: N
 Private report:     N

 New Comment:

> No notice with the same code on 7.3.

That is to be expected, because that notice is only raised as of
PHP 7.4.0; formerly the write error has been silently ignored.
While this change is documented in the migration guide[1], it is
not yet documented in the manual proper, so I'm re-categorizing as
doc bug.

[1] <https://www.php.net/manual/en/migration74.incompatible.php#migration74.incompatible.core.fread-fwrite>


Previous Comments:
------------------------------------------------------------------------
[2020-01-27 13:28:52] michael dot piche at csrt dot ulaval dot ca

No notice with the same code on 7.3.

------------------------------------------------------------------------
[2020-01-27 08:03:23] cmb@php.net

I think so.  @michael, what do you mean with

> Everything is working fine with PHP 7.3.

No notice, or did you actually get some output?

------------------------------------------------------------------------
[2020-01-26 16:17:52] nikic@php.net

To clarify, the bug here is that you can open php://stderr despite the webserver SAPI presumably not
having an stderr FD?

------------------------------------------------------------------------
[2020-01-26 16:14:56] cmb@php.net

I can confirm that behavior for FastCGI/IIS.

------------------------------------------------------------------------
[2020-01-24 13:42:47] michael dot piche at csrt dot ulaval dot ca

Description:
------------
Since PHP 7.4, the stream php://stderr is giving me a PHP notice "Bad file descriptor".
Everything is working fine with PHP 7.3. 

I'm on Windows using mod_fcgid. The notice isn't happening if I run my script directly
from the command line.

I've got the same error with php://stdout


Test script:
---------------
$fp = fopen('php://stderr', 'w+');
var_dump($fp);
fwrite($fp, "test\n");

Actual result:
--------------
resource(3) of type (stream) 

Notice: fwrite(): write of 5 bytes failed with errno=9 Bad file descriptor in
D:\htdocs\test_code\74.php on line 7


------------------------------------------------------------------------



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