Re: [PHP] Question about session_id() and session_start()

On 20/05/2013, Maciek Sokolewicz <[email protected]> wrote:
> On 20-5-2013 22:14, Tim Schofield wrote:
>> Matijn
>>
>> There are well over half a million lines of source code in PHP. It seems
>> a
>> little unhelpful to tell someone to go and read half a million lines of C
>> when you could just tell them the answer?
>>
>> Thanks
>> Tim
>>
>> Course View Towers,
>> Plot 21 Yusuf Lule Road,
>> Kampala
>> T +256 (0) 312 314 418
>> M +256 (0) 752 963 325
>> www.weberpafrica.com
>> Twitter: @TimSchofield2
>> Blog: http://weberpafrica.blogspot.co.uk
>> On May 20, 2013 6:24 PM, "Matijn Woudt" <[email protected]> wrote:
>>
>>> On Mon, May 20, 2013 at 5:33 AM, 孟远涛 <[email protected]> wrote:
>>>
>>>> I find the Note in PHP document.
>>>> http://www.php.net/manual/en/function.session-id.php
>>>>
>>>> "Note: When using session cookies, specifying an id for session_id()
>>>> will
>>>> always send a new cookie when session_start() is called, regardless if
>>> the
>>>> current session id is identical to the one being set."
>>>>
>>>> I feel puzzled about this feature. Even if the current session id is
>>>> identical to the one one being set, session_start will send a new
>>> cookie. I
>>>> want to know why session_start behave in this way.
>>>>
>>>> Forgive my poor English. Thanks in advance.
>>>>
>>>
>>> You will find the answer in the PHP source code.
>>> If you don't want this to happen, check if the current session id
>>> matches
>>> with the value you want to set it to, and don't set if they match.
>>>
>>> - Matijn
>>>
>>
>
> Tim,
>
> first of all, please bottom-post on this list.

Tell that to the designers of the android gmail app :-)

> Secondly, a simple google search for "php c session_start" resulted in
> this:
> https://github.com/php/php-src/blob/master/ext/session/session.c#L1303

That wasn't the advice given. The advice given was to read the source
code. My point was that is not very helpful advice. With a few notable
exceptions the help given on this list has become less and less
friendly over the years I have been reading it. This can't be good for
the PHP community.

>
> - Tul
>
>

Tim

-- 
Course View Towers,
Plot 21 Yusuf Lule Road,
Kampala
T   +256 (0) 312 314 418
M +256 (0) 752 963 325
www.weberpafrica.com
@TimSchofield2
Blog: http://weberpafrica.blogspot.co.uk/