session variables?

[Donnie]

can session variable hold objects that can later be reference by other
pages? if so, i get an "incomplete object" error when i try to call
methods from the object I have stored in the session. any help is
appreciated.

donnie

[R. Rajesh Jeba Anbiah]

Donnie <dq******@REMOVE-THISyahoo.com> wrote in message news:<AQ***************@fe61.usenetserver.com>...

can session variable hold objects that can later be reference by other
pages? if so, i get an "incomplete object" error when i try to call
methods from the object I have stored in the session. any help is
appreciated.

Did you read the manual <http://in2.php.net/session> ?

--
<?php echo 'Just another PHP saint'; ?>
Email: rrjanbiah-at-Y!com

[Donnie]

R. Rajesh Jeba Anbiah wrote:

Donnie <dq******@REMOVE-THISyahoo.com> wrote in message news:<AQ***************@fe61.usenetserver.com>...

can session variable hold objects that can later be reference by other
pages? if so, i get an "incomplete object" error when i try to call
methods from the object I have stored in the session. any help is
appreciated.

Did you read the manual <http://in2.php.net/session> ?

Yes, but I am not sure it answered my question. Perhaps I don't
understand it.

[Pedro Graca]

Donnie wrote:

R. Rajesh Jeba Anbiah wrote:

Donnie <dq******@REMOVE-THISyahoo.com> wrote in message news:<AQ***************@fe61.usenetserver.com>...

can session variable hold objects that can later be reference by other
pages? if so, i get an "incomplete object" error when i try to call
methods from the object I have stored in the session. any help is
appreciated.

Did you read the manual <http://in2.php.net/session> ?

Yes, but I am not sure it answered my question. Perhaps I don't
understand it.

You have to have the class defined before using objects of that class.
<?php //page1
class foo {
function bar() {echo "foobar";}
}

session_start();
$x = new foobar;
$x->print_me();
$_SESSION['foo'] = $x;
?>
<?php //page2 (with error)
session_start();
$y = $_SESSION['foo'];
$y->bar(); // incomplete object
?>
<?php //page3
class foo {
function bar() {echo "foobar";}
}

session_start();
$z = $_SESSION['foo'];
$z->print_me();
?>

The best thing to do is to include the class definition in a file for
itself and require that file whenever that class is needed.

<?php //foo.class.php
class foo {
function bar() {echo "foobar";}
}
?>

<?php
require_once 'foo.class.php';
session_start();
$w = $_SESSION['foo'];
$w->bar();
?>

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[John R Schleigh IV]

Pedro Graca wrote:

<?php
require_once 'foo.class.php';
session_start();
$w = $_SESSION['foo'];
$w->bar();
?>

I'm having the same trouble. When I try that, I get the following:

Warning: session_start() [function.session-start]: Cannot send session cache
limiter - headers already sent (output started
at /srv/www/htdocs/.../test_class.inc:16) in /srv/www/htdocs/.../test2.php
on line 4

Where test_class.inc has a simple class definition.
test1.php creates an instance of the class and stores it as
$_SESSION['junk'].
And test2.php looks like:
<?php

require_once ('test_class.inc');
session_start();

$_SESSION['junk']->display();

?>

It seems to process everything well enough, but the warning is annoying. Is
this a problem? I'm sure it's just a matter of turning an option off
somewhere to get rid of the warning, but should it not work without getting
it in the first place?

php 4.3.1
apache 1.3.27
linux kernel 2.4.20

John

[Pedro Graca]

John R Schleigh IV wrote:
<snip>

Warning: session_start() [function.session-start]: Cannot send session cache
limiter - headers already sent (output started ^^^^^^^^^^^^^^ at /srv/www/htdocs/.../test_class.inc:16) in /srv/www/htdocs/.../test2.php ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Line 16 of 'test_class.inc' is the first output to the browser your
script does. As it is executed /before/ the session_start() you get that
error.
on line 4
<snip>
And test2.php looks like:
<?php

require_once ('test_class.inc');
session_start();
It /may/ be enough to switch the order of these two lines.

Anyway, the class definition shouldn't output anything at all to the
browser. Only a class instance, when it calls the class methods, should
do that.
$_SESSION['junk']->display();

?>

It seems to process everything well enough, but the warning is annoying. Is
this a problem?
I believe it should be classified as an error, not a warning.
I think your pages won't work if they're based on cookies after that
warning.
I'm sure it's just a matter of turning an option off
somewhere to get rid of the warning, but should it not work without getting
it in the first place?

It's definitely better to remove the warning than to turn one option off
and keep it hidden.
If switching the require() and the session_start() does not work, you
have to rethink your test_class.inc -- maybe you'd even prefer not to
try the switch before dealing with test_class.inc.
Happy Coding :)

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[John R Schleigh IV]

Pedro Graca wrote:

Anyway, the class definition shouldn't output anything at all to the
browser. Only a class instance, when it calls the class methods, should
do that.

Here is the class definition file, I could not see that it sends anything to
the browser. When I place the class definition before the session_start()
it works fine, no error. But when I include the class definition, it still
spits out that error message.

<?php

/*
* test_class.inc
*/

class test{

var $test;

function display(){
echo "<pre>\n";
print_r ($this->test);
echo "</pre>\n";
}
}

?>

When I remove the closing "?>" from test_class.inc, everything worked fine.
No errors. I then put the "?>" back in and was very particular to make
sure there were no trailing lines or whitespace. It still worked. Perhaps
I had an extra line after the "?>"? I could see how that might send
something to the browser. Thanks for the help!

--
John
___________________
I can read your mind, and you should be ashamed of yourself.