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Re: session question

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On 4/13/2012 1:51 PM, William Gill wrote:
> On 4/13/2012 9:27 AM, Denis McMahon wrote:
>> Nope. Recursive is the wrong term to use here. It calls itself, yes, but
>> does not do so in a truly recursive manner.
>>
>>> I am thinking of using a session approach which would be simpler to
>>> follow, but have never used sessions on a page that is recursively
>>> called.
>>
>> This is not recursive calling. In recursive calling, a function calls
>> itself from within itself.
>>
>> In a web page that includes a link back to itself, it has completed all
>> processing before it is called again.
>>
>> Just include a single call to session_start() at the start of the main
>> php
>> script file, and don't call it on the included php script files.
>
> Though I agree with your definition of recursive calling of a function,
> I'm not sure the term recursive is limited to functions. However maybe
> repetitively would have been a better choice.
>
> To clear up some things for some of the other respondents, the page gets
> called several ways.
>
> 1) The initial GET domain/page.php which includes() an intro and list of
> links.
>
> 2) A second GET from one of the links:
> <a href="<?php echo $_SERVER['PHP_SELF'] ?>?whoDoYouWantToContact=John">
> which then includes() the HTML form.
>
> 3) A POST from the form:
> <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" >
> which then includes() a process the form script and an acknowledgement
> that the data was received.
>
> Denis, my testing confirms that you are correct, placing the
> session_start() on the core page does not produce errors on subsequent
> GETS or POSTS. Which makes logical sense, but seemed to conflict with
> the manual. Thanks, helping clear that up.
>
>

William, Denis is correct.  You are not calling the page recursively.

Recursive is when something calls itself without terminating.  Web 
scripts are transactional in nature - the first script finishes before 
the page is ever presented to the user.  So when the user clicks on a 
link (or whatever) to request the next page, a brand new request starts 
out.  Nothing is left over from the previous request except what is sent 
in the GET/POST parameters and cookies.

Note that saving data on the server in the $_SESSION still requires the 
session ID to be sent in one of the above parameters so you can save 
additional data on the server, but this is just to make things easier on 
the programmer.

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

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session question William Gill <noreply@domain.invalid> - 2012-04-12 12:43 -0400
  Re: session question Scott Johnson <noonehome@chalupasworld.com> - 2012-04-12 09:56 -0700
  Re: session question "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-12 19:43 +0200
  Re: session question "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-12 19:59 +0200
  Re: session question Captain Paralytic <paul_lautman@yahoo.com> - 2012-04-13 02:18 -0700
  Re: session question Denis McMahon <denismfmcmahon@gmail.com> - 2012-04-13 13:27 +0000
    Re: session question William Gill <noreply@domain.invalid> - 2012-04-13 13:51 -0400
      Re: session question Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-13 15:54 -0400
      Re: session question William Gill <nospam@domain.invalid> - 2012-04-20 02:40 -0400
        Re: session question "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-20 10:55 +0200
        Re: session question Erwin Moller <erwinmollerusenet@xs4all.nl> - 2012-04-20 11:25 +0200
        Re: session question Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-20 08:11 -0400
          Re: session question William Gill <noreply@domain.invalid> - 2012-04-20 10:59 -0400
            Re: session question William Gill <noreply@domain.invalid> - 2012-04-20 11:32 -0400
            Re: session question Michael Fesser <netizen@gmx.de> - 2012-04-20 17:50 +0200
              Re: session question William Gill <nospam@domain.invalid> - 2012-04-20 12:04 -0400
                Re: session question Tim Streater <timstreater@greenbee.net> - 2012-04-20 18:17 +0100
                Re: session question "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-20 20:08 +0200
                Re: session question Tim Streater <timstreater@greenbee.net> - 2012-04-20 20:36 +0100
                Re: session question William Gill <nospam@domain.invalid> - 2012-04-21 18:13 -0400
                Re: session question Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-20 14:22 -0400
                Re: session question William Gill <nospam@domain.invalid> - 2012-04-20 15:04 -0400
                Re: session question The Natural Philosopher <tnp@invalid.invalid> - 2012-04-20 22:09 +0100
                Re: session question Michael Fesser <netizen@gmx.de> - 2012-04-20 21:13 +0200
                Re: session question Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-20 15:45 -0400
                Re: session question Tim Streater <timstreater@greenbee.net> - 2012-04-20 23:11 +0100
                Re: session question The Natural Philosopher <tnp@invalid.invalid> - 2012-04-20 23:23 +0100
                Re: session question Tim Streater <timstreater@greenbee.net> - 2012-04-21 13:14 +0100
                Re: session question Jerry Stuckle <jstucklex@attglobal.net> - 2012-04-20 18:45 -0400
                Re: session question Michael Fesser <netizen@gmx.de> - 2012-04-21 01:24 +0200
                Re: session question The Natural Philosopher <tnp@invalid.invalid> - 2012-04-21 01:28 +0100

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