Problem with object in $_SESSION and include

Hi,

I have to put an object in $_SESSION and to use it later in the session.

My class is defined in a file which I include at the beginning of my program
,
just after my session has been started:

session_start();
require_once "include/Produit.php";

When my program comes back, I try to get my stored object back:


line 3: $x = new Produit();
line 4: $x=&$_SESSION['produit'];
line 5: echo "*** produit:".$x -> nomFR;

and I get this error:

Fatal error: The script tried to execute a method or access a property of an
incomplete object. Please ensure that the class definition produit of the
object you are trying to operate on was loaded _before_ the session was
started in /[...]/maj.php on line 5

I then invert my session_start and the include:

line 10: require_once "include/Produit.php";
line 11: session_start();

and I get this warning:

Warning: Cannot send session cache limiter - headers already sent (output
started at [...]/Produit.php:160) in [...]/ctrlappl.php on line 11

where /Produit.php is the file containing my class and line 160 is the very
last line of the file.

Can someone help?

Jean Vaillancourt, Mascouche

Jean Vaillancourt wrote:
> Hi,

Bonsoir, (:p)

[...]

> Warning: Cannot send session cache limiter - headers already sent (output
> started at [...]/Produit.php:160) in [...]/ctrlappl.php on line 11

This is just because you start the sessions after something has been
sent to the (client's) browser.

[...]

> Can someone help?

I wish i could do more.

> Jean Vaillancourt, Mascouche

HTH,
Sebastian

"Jean Vaillancourt" wrote:
> Hi,
>
> I have to put an object in $_SESSION and to use it later in the
> session.
>
> My class is defined in a file which I include at the beginning of
my
> program,
> just after my session has been started:
>
> session_start();
> require_once "include/Produit.php";
>
> When my program comes back, I try to get my stored object back:
>
>
> line 3: $x = new Produit();
> line 4: $x=&$_SESSION[’produit’];
> line 5: echo "*** produit:".$x -> nomFR;
>
> and I get this error:
>
> Fatal error: The script tried to execute a method or access a
property
> of an
> incomplete object. Please ensure that the class definition produit
of
> the
> object you are trying to operate on was loaded _before_ the session
> was
> started in /[...]/maj.php on line 5
>
> I then invert my session_start and the include:
>
> line 10: require_once "include/Produit.php";
> line 11: session_start();
>
> and I get this warning:
>
> Warning: Cannot send session cache limiter - headers already sent
> (output
> started at [...]/Produit.php:160) in [...]/ctrlappl.php on line 11
>
> where /Produit.php is the file containing my class and line 160 is
the
> very
> last line of the file.
>
> Can someone help?
>
> Jean Vaillancourt, Mascouche

To save an object to session, use serialize() and unserialize().

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"steve" wrote:
> [quote:4e18fefa32="Jean Vaillancourt"]Hi,
>
> I have to put an object in $_SESSION and to use it later in the
> session.
>
> My class is defined in a file which I include at the beginning of
my
> program,
> just after my session has been started:
>
> session_start();
> require_once "include/Produit.php";
>
> When my program comes back, I try to get my stored object back:
>
>
> line 3: $x = new Produit();
> line 4: $x=&$_SESSION[’produit’];
> line 5: echo "*** produit:".$x -> nomFR;
>
> and I get this error:
>
> Fatal error: The script tried to execute a method or access a
property
> of an
> incomplete object. Please ensure that the class definition produit
of
> the
> object you are trying to operate on was loaded _before_ the session
> was
> started in /[...]/maj.php on line 5
>
> I then invert my session_start and the include:
>
> line 10: require_once "include/Produit.php";
> line 11: session_start();
>
> and I get this warning:
>
> Warning: Cannot send session cache limiter - headers already sent
> (output
> started at [...]/Produit.php:160) in [...]/ctrlappl.php on line 11
>
> where /Produit.php is the file containing my class and line 160 is
the
> very
> last line of the file.
>
> Can someone help?
>
> Jean Vaillancourt, Mascouche

To save an object to session, use serialize() and
unserialize().[/quote:4e18fefa32]

I believe the 2nd problem of yours relates to something being echoed
before session_start.  Use something like ob_start() to cache content
(see manual).

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But I changed my object to one with absolutely no instruction.
It just had an empty constructor and no method and no variable.
And I still got the error.  I don't think it's an echo problem.

Jean

Le Sat, 31 Jul 2004 03:07:09 +0200, Sebastian Lauwers a écrit_:

> Jean Vaillancourt wrote: 
>
> Bonsoir, (:p)
>
> [...]
> 
>
> This is just because you start the sessions after something has been
> sent to the (client's) browser.
>
> [...]
> 
>
> I wish i could do more.
> 
>
> HTH,
> Sebastian

"Jean Vaillancourt" wrote:
> But I changed my object to one with absolutely no instruction.
> It just had an empty constructor and no method and no variable.
> And I still got the error.  I don’t think it’s an echo
> problem.
>
> Jean
>
> Le Sat, 31 Jul 2004 03:07:09 +0200, Sebastian Lauwers a écrit_:
> 
> sent (output 
> line 11 
> been 

But you did state "Warning: Cannot send session cache limiter -
headers already sent ", this means something was output already, even
html headers.   This will 99% fixed if you cache using ob_start, give
it a try (one instruction, ez to do).

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Well, it worked with serialize - unserialize.
I also put ob_start() - od_end_clean() around session_start()
and I got no warning.  It was ok when I wrote @session_start() too.

I just don't understand why I got a warning (Cannot send session
cache limiter - headers already sent) with a completely empty
object.  Does PHP echo something when you declare an object?

Anyway, I thank everyone for your help.

Jean

Le Fri, 30 Jul 2004 22:03:36 -0400, steve a écrit_:

> "steve" wrote: 
> my 
> property 
> of 
> the 
>
> To save an object to session, use serialize() and
> unserialize().[/quote:4e18fefa32]
>
> I believe the 2nd problem of yours relates to something being echoed
> before session_start.  Use something like ob_start() to cache content
> (see manual).

"Jean Vaillancourt" wrote:
> Well, it worked with serialize - unserialize.
> I also put ob_start() - od_end_clean() around session_start()
> and I got no warning.  It was ok when I wrote @session_start() too.
>
> I just don’t understand why I got a warning (Cannot send session
>
> cache limiter - headers already sent) with a completely empty
> object.  Does PHP echo something when you declare an object?
>
> Anyway, I thank everyone for your help.
>
> Jean
>
> Le Fri, 30 Jul 2004 22:03:36 -0400, steve a écrit_:
> 
> the 
> beginning of 
> back: 
> a 
> produit 
> session 
> already sent 
> line 11 
> 160 is 
>
> I believe the 2nd problem of yours relates to something being echoed
> before session_start.  Use something like ob_start() to cache
content
> (see manual).</font>[/quote:5749aa770e]

No, I think you are echo’ing http header info.  It is easy to test
(specially if you have a debugger).  You can echo out the content of
ob_get_content() periodically (since you did ob_start), and it would
show you what is in the cache.

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Jean Vaillancourt spilled the following:


> Warning: Cannot send session cache limiter - headers already sent (output
> started at [...]/Produit.php:160) in [...]/ctrlappl.php on line 11
>
> where /Produit.php is the file containing my class and line 160 is the
> very last line of the file.
>

Trailing whitespace/non-printable chars in the include file? Try referencing
the session before including the class definition e.g.

session_register('some_random_name');
require_once('Produit.php');
$x=&$_SESSION['produit'];

HTH

C.