Seems correct, & is coherent. So I'll need torevise my strategy gor data 
perdistence. 
Cookies should be available, as long as I don't try to use them as vehicles 
PHP -> client.


Le mercredi 14 mars 2012 17:09:02 UTC+1, Remi Grumeau a écrit :
>
> On Wed, Mar 14, 2012 at 3:54 PM, Fibo <bernard.savo...@gmail.com> wrote:
>
>> Thx Rémi, I understand now. I was believing session data was alive on the 
>> server (eg, session.save_path: /var/lib/php5) , not on the client...
>>
>
> They are. PHP is a server side script.
> But when loading, the document asks the server for a page. This page comes 
> with its body, but also a header. Body is what you see/written, header 
> is/must be initialized before anything is written.
> This is not related to HTML <body> or <head>, a PHP script can render 
> anything (plain text, HTML, image, JSON, RSS, PDF ...)
>
> What you got asking for $_SESSION is what $_SESSION is (on the server) 
> when you ask for A.php.
> I'm 99% sure but i might be wrong... someone ?
>
>  
>> B-(( I was thinking of php session's variables as an easy way to store 
>> data in a persistent way, rather than playing with <input and POST amongst 
>> my different windows generated by php scripts.
>> I had some trouble with input/POST and SESSION (fed thru input/POST, but 
>> only once for each variable) and, if it had worked, session variable would 
>> have solved that.
>>
>  
>
>> It I still can't make it thru input/POST, I will probably look at cookies.
>>
>
> Cookies are part of the header...
>
>
> OFT: That's the point of websockets for example: it has no header, so no 
> cookie infos, no session infos, ... clearly lighter.
>
>
>
> Le mercredi 14 mars 2012 15:19:48 UTC+1, Remi Grumeau a écrit :
>>
>>> Session lives in the document header, which is refreshed only on page 
>>> load.
>>> When you load A, it stores $_SESSION.
>>>  
>>> So A is the page running iUI, doing ajax calls to B  or C.
>>>  
>>> When asking B from A, B is loaded so its header (and PHP session) is 
>>> updated.
>>> Not A's since it's not reloaded.
>>> So when asking C *from A*, it uses the session of A, not the one B 
>>> changed.
>>>
>>> Best way to get an updated variables is to:
>>> - reload A so header / session is updated
>>> - use a JS variable in A you update with B ajax call result
>>>
>>>
>>> Remi
>>>
>>>
>>> On Wed, Mar 14, 2012 at 2:52 PM, Fibo <bernard.savo...@gmail.com> wrote:
>>>
>>>> Just to be clear: I stumble on a PHP related problem, for which I have 
>>>> not (yet) found a PHP explanation. 
>>>> So I am exploring that the problem might result from *my* use of iUI.
>>>>  
>>>>  
>>>> Short form: what might lead $_SESSION content to change between several 
>>>> PHP pages?
>>>>
>>>> Background:
>>>> From an HTML/javascript/iUI page I am calling PHP scripts A, later B, 
>>>> later C. These scripts are called thru submitting forms with POST.
>>>>  
>>>> 1 - In A.php I define values in $_SESSION, and luckily they are stil 
>>>> there when later script B is called: this matches the expected session 
>>>> handling.
>>>> While in B.php I place some values in the $_SESSION array, eg 
>>>> $_SESSION['my_data']='in Form B';
>>>> After setting up these values, check if this worked by displaying the 
>>>> $_SESSION array.
>>>>  
>>>> 2 - After control returns to the client, script C.php is called... but 
>>>> $_SESSION contents look the same than after script A, ie as if what has 
>>>> happened in B.php... was cancelled or ignored.
>>>>
>>>> Any idea? In which situations do you think this might happen?
>>>>
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