Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.php > #1757 > unrolled thread

Detecting Redirected Output

Back to article view | Back to comp.lang.php

Contents

  Detecting Redirected Output Bob Smith <bsmith@sudleydeplacespam.com> - 2011-05-21 21:06 -0400
    Re: Detecting Redirected Output Jerry Stuckle <jstucklex@attglobal.net> - 2011-05-21 23:14 -0400
      Re: Detecting Redirected Output "Twayne" <nobody@devnull.spamcop.net> - 2011-05-22 09:04 -0400
    Re: Detecting Redirected Output Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-05-22 13:06 +0200
      Re: Detecting Redirected Output Bob Smith <bsmith@sudleydeplacespam.com> - 2011-05-22 12:17 -0400

#1757 — Detecting Redirected Output

Running under Win7, a script I'm writing needs to vary its behavior 
depending upon whether or not the output from PHP is being redirected. 
That is, I want to know from within the PHP script whether it's called as

php foo.php

or

php foo.php > outfile

None of the Output Control Functions appears to be helpful.

Way back in DOS days, there was an IOCTL call which the program could 
use to distinguish those two cases.  Is there anything comparable in PHP?

-- 
_________________________________________
Bob Smith -- bsmith@sudleydeplacespam.com

To reply to me directly, delete "despam".

[toc] | [next] | [standalone]

#1759

On 5/21/2011 9:06 PM, Bob Smith wrote:
> Running under Win7, a script I'm writing needs to vary its behavior
> depending upon whether or not the output from PHP is being redirected.
> That is, I want to know from within the PHP script whether it's called as
>
> php foo.php
>
> or
>
> php foo.php > outfile
>
> None of the Output Control Functions appears to be helpful.
>
> Way back in DOS days, there was an IOCTL call which the program could
> use to distinguish those two cases. Is there anything comparable in PHP?
>

Nope.  Not possible in PHP.  And it shouldn't be, either.  The purpose 
of a redirect is to be able to save the output.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
==================

[toc] | [prev] | [next] | [standalone]

#1765

In news:ir9v2l$rnv$2@dont-email.me,
Jerry Stuckle <jstucklex@attglobal.net> typed:
> On 5/21/2011 9:06 PM, Bob Smith wrote:
>> Running under Win7, a script I'm writing needs to vary
>> its behavior depending upon whether or not the output
>> from PHP is being redirected. That is, I want to know
>> from within the PHP script whether it's called as php foo.php
>>
>> or
>>
>> php foo.php > outfile
>>
>> None of the Output Control Functions appears to be
>> helpful. Way back in DOS days, there was an IOCTL call which the
>> program could use to distinguish those two cases. Is
>> there anything comparable in PHP?
>
> Nope.  Not possible in PHP.  And it shouldn't be, either.
> The purpose of a redirect is to be able to save the
> output.

So says the exalted high troll of the newsgroups whose only intent in life 
is to issue meaningless and uncalled for criticisms in order to make up for 
his own lack of power by stealing it from others.

[toc] | [prev] | [next] | [standalone]

#1762

Bob Smith wrote:

> Running under Win7, a script I'm writing needs to vary its behavior
> depending upon whether or not the output from PHP is being redirected.
> That is, I want to know from within the PHP script whether it's called as
> 
> php foo.php
> 
> or
> 
> php foo.php > outfile
> 
> None of the Output Control Functions appears to be helpful.
> 
> Way back in DOS days, there was an IOCTL call which the program could
> use to distinguish those two cases.  Is there anything comparable in PHP?

In PHP, yes; but not on Windows, as the POSIX extension is not available 
there (according to the manual):

<http://lmgtfy.com/?q=php+cli+redirection+-http>


PointedEars
-- 
Anyone who slaps a 'this page is best viewed with Browser X' label on
a Web page appears to be yearning for the bad old days, before the Web,
when you had very little chance of reading a document written on another
computer, another word processor, or another network. -- Tim Berners-Lee

[toc] | [prev] | [next] | [standalone]

#1771

On 5/22/2011 7:06 AM, Thomas 'PointedEars' Lahn wrote:
> Bob Smith wrote:
>
>> Running under Win7, a script I'm writing needs to vary its behavior
>> depending upon whether or not the output from PHP is being redirected.
>> That is, I want to know from within the PHP script whether it's called as
>>
>> php foo.php
>>
>> or
>>
>> php foo.php>  outfile
>>
>> None of the Output Control Functions appears to be helpful.
>>
>> Way back in DOS days, there was an IOCTL call which the program could
>> use to distinguish those two cases.  Is there anything comparable in PHP?
>
> In PHP, yes; but not on Windows, as the POSIX extension is not available
> there (according to the manual):
>
> <http://lmgtfy.com/?q=php+cli+redirection+-http>

Having just learned that this is trivial in Python, I looked more 
carefully at PHP on Windows and found a couple of ways to tell if STDOUT 
has been redirected:

1.  $fd = fopen ('php://stdout', "w");
if (ftell ($fd) === false)
     echo "STDOUT not redirected.\n";
else
     echo "STDOUT redirected.\n";
fclose ($fd);

2.  $fd = fopen ('php://stdout', "w");
$a = fstat ($fd);		
if ($a['dev'] != 0)		// or ['rdev']
     echo "STDOUT not redirected.\n";
else
     echo "STDOUT redirected.\n";
fclose ($fd);

There also is a difference in $a['mode'] which I did not pursue.

-- 
_________________________________________
Bob Smith -- bsmith@sudleydeplacespam.com

To reply to me directly, delete "despam".

[toc] | [prev] | [standalone]

Back to top | Article view | comp.lang.php

csiph-web