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Re: redirect stdout and stderr to PHP variables?

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On 01/26/2012 08:18 AM, Erwin Moller wrote:
> On 1/26/2012 3:11 PM, crankypuss wrote:
>> On 01/26/2012 05:25 AM, M. Strobel wrote:
>>> Am 26.01.2012 12:14, schrieb crankypuss:
>>>> On 01/26/2012 03:43 AM, Erwin Moller wrote:
>>>>> On 1/26/2012 10:27 AM, crankypuss wrote:
>>>>>> On 01/26/2012 02:00 AM, Tim Streater wrote:
>>>>>>> In article<jfr340125sq@news4.newsguy.com>,
>>>>>>> crankypuss<no@email.thanks> wrote:
>>>>>>>
>>>>>>>> On 01/25/2012 03:53 PM, crankypuss wrote:
>>>>>>>>> On 01/25/2012 02:46 PM, M. Strobel wrote:
>>>>>>>>>> php> $res1 = exec('rm this-does-really-not-exist.php 2>&1', $a,
>>>>>>>> $rc);
>>>>>>>>>> php> echo $rc;
>>>>>>>>>> 1
>>>>>>>>>> php> print_r($a);
>>>>>>>>>> Array
>>>>>>>>>> (
>>>>>>>>>> [0] => rm: Entfernen von „this-does-really-not-exist.php“ nicht
>>>>>>>>>> möglich: Datei
>>>>>>>>>> oder Verzeichnis nicht gefunden
>>>>>>>>>> )
>>>>>>>>>> php>
>>>>>>>>>
>>>>>>>>> Thanks, will try these in the morning.
>>>>>>>>
>>>>>>>> BTW, where is this syntax documented? I'd prefer understanding
>>>>>>>> it to
>>>>>>>> using magic.
>>>>>>>
>>>>>>> Which syntax, exactly? exec is documented in the PHP online docs.
>>>>>>
>>>>>> Sorry, I've been unable to find the bit about redirecting stdout and
>>>>>> stderr to PHP variables, can you point me to that? Yes, exec()
>>>>>> provides
>>>>>> an optional&$output argument which in effect redirects stdout to the
>>>>>> varialble, but I see no way to obtain stderr separately. Thanks.
>>>>>
>>>>> Hi crankypuss,
>>>>>
>>>>> You only see this redirecting in functions that handle with STDERR and
>>>>> STDOUT, functions like exec() you already use.
>>>>> When you are working within 'normal' PHP (as in "No external processes
>>>>> invoked by user", so no exec() and the like) you don't have the
>>>>> concept
>>>>> of STDERR directly, nor do you need it.
>>>>> Of course: errors can still occur, but PHP will handle them. You can
>>>>> modify HOW you want PHP to handle them (logging into file/errorlog,
>>>>> put
>>>>> them on screen, invoke some custom-errorhandler/etc).
>>>>>
>>>>> To put it very simple (and probably incorrect) to get the general
>>>>> idea:
>>>>> You can think of PHP in relation with STDIN and STDOUT and STDERR like
>>>>> this:
>>>>>
>>>>> STDIN for PHP is what is feeded to PHP (via Apache, or commandline)
>>>>> So that consists typically of things like (part of) URL, cookies,
>>>>> referrer, etc.
>>>>>
>>>>> STDOUT is what PHP produces and is returned to the client (most of the
>>>>> time with a webserver inbetween).
>>>>>
>>>>> STDERR is where PHP directs its erorrs to. (Think logfile, and/or to
>>>>> STDOUT: this is all configurable.)
>>>>>
>>>>> But you don't see STDIN/STDOUT/STDERR when you work with PHP without
>>>>> using exec().
>>>>>
>>>>> Regards,
>>>>> Erwin Moller
>>>>
>>>> So how do you capture only STDERR when using exec() ?
>>>
>>> You can not capture only stderr, because exec returns only stdout. So
>>> you only can
>>> redirect stderr to stdout.
>>
>> As far as I'm concerned that's pretty useless.
>>
>>> You can do it with http://es.php.net/manual/en/function.proc-open.php
>>> Maybe you should explain what your basic problem is.
>>
>> I have. Lots of stdout lines with a few stderr lines, I want to output
>> the stderr lines *after* stdout instead of interspersed.
>>
>
>
> Hi Crankypuss,
>
> Read this:
> http://nl.php.net/manual/en/function.proc-open.php
>
> It is a little more complicated, but you can capture what you need
> (STDERR in this case).

It looks like it might be what I'm looking for, but it will be a while 
before I can get around to studying/trying it; thanks very much.

> Very off topic:
> Concerning your wish to intergrate PHP with a windowing environment, I
> found this:
>
> http://en.wikipedia.org/wiki/PHP-Qt
>
> I haven't used it myself, only with C++ so I have no clue how good it
> all is, but QT is solid.

Yes, I found that several days ago.  It's object oriented, which is 
rather a turnoff for me since all my PHP is currently strictly 
procedural (mostly because eventually I'll port it to C, not C++, and 
will probably do the bulk of that with a conversion program), there's no 
repository that looks clearly trustworthy, and I don't care to build it 
from source (because at this point in time I am too stoopid to do that 
and have too much other stuff going on).

I'm keeping my eyes open but my current thinking is to either build a 
pseudo-browser (based on gekko?) or modify Firefox about the head and 
shoulders until it knows how to invoke PHP the way apache invokes it.

Thanks much.

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Thread

redirect stdout and stderr to PHP variables? crankypuss <no@email.thanks> - 2012-01-25 12:47 -0700
  Re: redirect stdout and stderr to PHP variables? "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-01-25 22:42 +0100
  Re: redirect stdout and stderr to PHP variables? "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-01-25 22:46 +0100
    Re: redirect stdout and stderr to PHP variables? crankypuss <no@email.thanks> - 2012-01-25 15:53 -0700
      Re: redirect stdout and stderr to PHP variables? crankypuss <no@email.thanks> - 2012-01-26 01:33 -0700
        Re: redirect stdout and stderr to PHP variables? "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-01-26 09:46 +0100
          Re: redirect stdout and stderr to PHP variables? crankypuss <no@email.thanks> - 2012-01-26 02:23 -0700
            Re: redirect stdout and stderr to PHP variables? Michael Fesser <netizen@gmx.de> - 2012-01-26 14:35 +0100
            Re: redirect stdout and stderr to PHP variables? "Peter H. Coffin" <hellsop@ninehells.com> - 2012-01-26 07:49 -0600
        Re: redirect stdout and stderr to PHP variables? Tim Streater <timstreater@greenbee.net> - 2012-01-26 09:00 +0000
          Re: redirect stdout and stderr to PHP variables? crankypuss <no@email.thanks> - 2012-01-26 02:27 -0700
            Re: redirect stdout and stderr to PHP variables? Erwin Moller <erwinmollerusenet@xs4all.nl> - 2012-01-26 11:43 +0100
              Re: redirect stdout and stderr to PHP variables? crankypuss <no@email.thanks> - 2012-01-26 04:14 -0700
                Re: redirect stdout and stderr to PHP variables? "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-01-26 13:25 +0100
                Re: redirect stdout and stderr to PHP variables? crankypuss <no@email.thanks> - 2012-01-26 07:11 -0700
                Re: redirect stdout and stderr to PHP variables? Erwin Moller <erwinmollerusenet@xs4all.nl> - 2012-01-26 16:18 +0100
                Re: redirect stdout and stderr to PHP variables? crankypuss <no@email.thanks> - 2012-01-27 03:11 -0700
  Re: redirect stdout and stderr to PHP variables? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-25 17:25 -0500
    Re: redirect stdout and stderr to PHP variables? crankypuss <no@email.thanks> - 2012-01-27 03:16 -0700
      Re: redirect stdout and stderr to PHP variables? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-27 08:49 -0500
        Re: redirect stdout and stderr to PHP variables? Erwin Moller <erwinmollerusenet@xs4all.nl> - 2012-01-27 16:00 +0100
          Re: redirect stdout and stderr to PHP variables? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-27 10:12 -0500
            Re: redirect stdout and stderr to PHP variables? "Peter H. Coffin" <hellsop@ninehells.com> - 2012-01-27 10:37 -0600
              Re: redirect stdout and stderr to PHP variables? Jerry Stuckle <jstucklex@attglobal.net> - 2012-01-30 21:37 -0500
            Re: redirect stdout and stderr to PHP variables? crankypuss <no@email.thanks> - 2012-01-28 05:00 -0700
  Re: redirect stdout and stderr to PHP variables? "Peter H. Coffin" <hellsop@ninehells.com> - 2012-01-25 16:52 -0600
    Re: redirect stdout and stderr to PHP variables? crankypuss <no@email.thanks> - 2012-01-27 03:22 -0700
      Re: redirect stdout and stderr to PHP variables? "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-01-27 12:25 +0100
        Re: redirect stdout and stderr to PHP variables? crankypuss <no@email.thanks> - 2012-01-28 05:03 -0700
          Re: redirect stdout and stderr to PHP variables? "Peter H. Coffin" <hellsop@ninehells.com> - 2012-01-28 11:40 -0600
          Re: redirect stdout and stderr to PHP variables? "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-01-29 00:40 +0100
  Re: redirect stdout and stderr to PHP variables? Curtis Dyer <dyer85@gmail.com> - 2012-01-25 22:56 +0000
    Re: redirect stdout and stderr to PHP variables? crankypuss <no@email.thanks> - 2012-01-27 03:23 -0700
      Re: redirect stdout and stderr to PHP variables? Erwin Moller <erwinmollerusenet@xs4all.nl> - 2012-01-27 11:42 +0100
        Re: redirect stdout and stderr to PHP variables? Curtis Dyer <dyer85@gmail.com> - 2012-01-29 04:56 +0000
  Re: redirect stdout and stderr to PHP variables? [solved] crankypuss <no@email.thanks> - 2012-02-01 05:22 -0700

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