php-general Digest 20 Mar 2011 18:39:34 -0000 Issue 7235
Topics (messages 311975 through 311976):
Re: PHP session replication
311975 by: Alessandro Ferrucci
Problem with PHP 5.3.3 under Debian/Squeeze
311976 by: Michelle Konzack
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--- Begin Message ---
Hi Florin, thank you for your write up, actually the main reason why I asked
the original question was because I mainly write servlet based webapps
currently but I've decided to use PHP for my next project mainly for
exploratory reasons.
On Sat, Mar 19, 2011 at 10:06 AM, Florin Jurcovici <
[email protected]> wrote:
> Hi.
>
> Just for comparison:
>
> PHP does not provide sessions in the same way a servlet-based platform
> provides. PHP actually destroys the in-mem representation of sessions
> after each request is served, whereas a servlet-based platform caches
> the sessions in mem between requests.
>
> ASP.Net also serializes session state, but not into a cookie - it uses
> a hidden field instead. Which works around cookie size limitation. You
> don't even have a choice of database sessions with ASP.Net. OTOH, even
> if performance might suffer, scalability, as far as the sessions
> mechanism is concerned, is excellent - you don't need session
> replication.
>
> Servlet-based platforms provide the most complicated solution, when
> compared to the other two. They keep sessions in mem, which improves
> performance (no serialization/deserialization for each request), but
> creates potential scalability problems. You won't hit the wall at a
> few thousands of users, but replicating maybe a million sessions among
> no more than a hundred servers causes the replication process to
> consume quite a lot of resources, the resources being used for
> replication increasing faster than linearly with each added server
> (not quite exponentially, though). You can use sticky sessions with
> most servlet-based platforms, but these come with their own problems
> (already described by a previous poster). Nevertheless, in mem
> sessions a la servlets are a very convenient mechanism to use - the
> session replication is provided by the platform, and the app
> programmer doesn't have to worry about it.
>
> All three approaches rely on every piece of data in the session being
> serializable, so you can't store interesting objects, like an open
> file or the like, in sessions.
>
> Does anybody know of any fundamentally different session
> sharing/replication mechanism?
>
> br,
>
> flj
>
> --
> PHP General Mailing List (http://www.php.net/)
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>
--
Signed,
Alessandro Ferrucci
--- End Message ---
--- Begin Message ---
Hello *,
since I have re-installed <mail.tamay-dogan.net> with Debian/Squeeze on
a new machine, my /srv/log/apache/error.log ist arround 450 times bigger
then the access.log du to following (and similar) entries
----[ '/srv/log/apache/error.log' ]-------------------------------------
[Thu Mar 17 00:14:16 2011] [error] [client 89.204.153.240] PHP Notice: Use of
undefined constant DIR_BASE - assumed 'DIR_BASE' in /srv/htdocs/index.php on
line 3
[Thu Mar 17 00:14:16 2011] [error] [client 89.204.153.240] PHP Notice: Use of
undefined constant DIR_TOOL - assumed 'DIR_TOOL' in /srv/htdocs/index.php on
line 5
[Thu Mar 17 00:14:16 2011] [error] [client 89.204.153.240] PHP Notice: Use of
undefined constant DEF_DIR_TOOL - assumed 'DEF_DIR_TOOL' in
/srv/tdphp-vserver/includes/00_main.inc on line 42
[Thu Mar 17 00:14:16 2011] [error] [client 89.204.153.240] PHP Notice: Use of
undefined constant DEF_DIR_BASE - assumed 'DEF_DIR_BASE' in
/srv/tdphp-vserver/includes/00_main.inc on line 65
[Thu Mar 17 00:14:16 2011] [error] [client 89.204.153.240] PHP Notice: Use of
undefined constant DIR_HOST - assumed 'DIR_HOST' in
/srv/tdphp-vserver/includes/00_main.inc on line 88
[Thu Mar 17 00:14:16 2011] [error] [client 89.204.153.240] PHP Notice: Use of
undefined constant SCRIPT_FILENAME - assumed 'SCRIPT_FILENAME' in
/srv/tdphp-vserver/includes/00_main.inc on line 88
<snip>
------------------------------------------------------------------------
----[ '/srv/htdocs/index.php' ]-------------------------------------
<?php
define(DIR_BASE, "/srv");
define(DIR_TOOL, "/srv/tdphp-vserver");
include DIR_TOOL . "/includes/00_main.inc";
?>
------------------------------------------------------------------------
Maybe I am sitting on the line? This index.php file and the website is
working since ages.
Whats the name of the error loging setting which produce this and WHY are
they now reported?
I have switched off anything but it continue to create more then 46 GByte
error files (18) per day.
Also I get
----[ '/srv/log/apache/error.log' ]-------------------------------------
[Thu Mar 17 00:14:16 2011] [error] [client 89.204.153.240] PHP Notice:
Undefined offset: 1 in /srv/tdphp-vserver/includes/04_l10n.inc on line 56
[Thu Mar 17 00:14:16 2011] [error] [client 89.204.153.240] PHP Notice:
Undefined offset: 1 in /srv/tdphp-vserver/includes/04_l10n.inc on line 56
[Thu Mar 17 00:14:16 2011] [error] [client 89.204.153.240] PHP Notice:
Undefined offset: 1 in /srv/tdphp-vserver/includes/04_l10n.inc on line 56
[Thu Mar 17 00:14:16 2011] [error] [client 89.204.153.240] PHP Notice:
Undefined variable: locale in /srv/tdphp-vserver/includes/04_l10n.inc on line 74
[Thu Mar 17 00:14:16 2011] [error] [client 89.204.153.240] PHP Notice:
Undefined index: what in /srv/tdphp-vserver/includes/00_main.inc on line 249
[Thu Mar 17 00:14:16 2011] [error] [client 89.204.153.240] PHP Notice:
Undefined index: csslink in /srv/tdphp-vserver/includes/00_main.inc on line 284
[Thu Mar 17 00:14:16 2011] [error] [client 89.204.153.240] PHP Notice:
Undefined index: cookie in /srv/tdphp-vserver/includes/00_main.inc on line 298
------------------------------------------------------------------------
----[ '/srv/tdphp-vserver/includes/04_l10n.inc' ]-----------------------
[0051] if ( $_SERVER['HTTP_ACCEPT_LANGUAGE'] != '') {
[0052] foreach(explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']) as $ACC1) {
[0053] $ACC2=explode(';', $ACC1);
[0054] $ACC3=explode('-', $ACC2[0]);
[0055] $LL=$ACC3[0];
[0056] $CC=strtoupper($ACC3[1]);
[0057] if ( $CC != '') {
[0058] $LOC=$LL . "_" . $CC;
[0059] } else {
[0060] $LOC=$LL;
[0061] }
[0062] if ( stristr(" " . LOCALES . " ", " $LOC ") ) {
[0063] $TMP_FILE=LOCALE_DIR . "/" . $LOC . "/LC_MESSAGES/" .
$_SERVER['SERVER_NAME'] . ".mo";
[0064] if (is_file($TMP_FILE)) {
[0065] $locale=$LOC;
[0066] break;
[0067] }
[0068] }
[0069] }
[0070] } else {
[0071] $locale=(isset($_GET['lang']))? $_GET['lang'] : DEFAULT_LOCALE;
[0072] }
[0073]
[0074] T_setlocale(LC_MESSAGES, $locale);
[0075] $domain=$_SERVER['SERVER_NAME'];
[0076] T_bind_textdomain_codeset($domain, $encoding);
[0077] T_bindtextdomain($domain, LOCALE_DIR);
[0078] T_textdomain($domain);
[0079] /* *************************** END gettext stuff
*************************** */
[0080] ?>
-------------------------------------------------------------------------
----[ '/srv/tdphp-vserver/includes/00_main.inc' ]------------------------
[0248] /* ************************ DISPLAY admin ************************* */
[0249] if ( $_POST['what'] == 'admin' ) {
[0250]
[0251] function do_auth() {
<snip>
[0283] /* *************************** FIX CSS **************************** */
[0284] if ($_GET['csslink'] != '') {
[0285] if ($_GET['csslink'] == 'foo') {
<snip>
[0297] /* ******************** SET and UNSET COOKIES ********************* */
[0298] if ( $_GET['cookie'] != '' ) {
[0299] if ($_GET['cookie'] == 'set') {
<snip>
-------------------------------------------------------------------------
I am something missing here...
Thanks, Greetings and nice Day/Evening
Michelle Konzack
--
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