Re: [PHP-DB] Learning PHP Sessions
This is really off-topic for this list, but...
From my understanding of sessions, you really don't want session_start()
in an if{} block. Every time you hit this script, it will have no memory
of any session variables until you call session_start().
-Steve
On Tuesday, October 30, 2001, at 02:30 PM, Matthew Tedder wrote:
?php
/*
Hi,
I'm new to PHP and am having trouble understanding how to use PHP
sessions. My book tells in near the beginning how to start them and
register
session variables, but I can't figure out how to destroy a session or
later
read those session variables. I'm also trying to do this across
frames, but
can't even get it to work within a single page.
Here's what I've learned so far and what my problems are:
*/
/* To start a session */
session_start();
/* To register a session variable */
session_register(myvar);
$myvar = some value;
/*
PROBLEM #1: From the above commands, I get a $PHPSESSID that seems to
be
globally available for use, but I cannot seem to read my values back
out of
the registered session variable from anywhere... I tried:
*/
print $myvar\n; /* and absolutely nothing is printed */
/* To destroy a session */
session_destroy();
/*
PROBLEM #2: This says there is no session to destroy. It's rather
strange
because I can still print the $PHPSESSID value..
I've attached my code...
*/
?
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Re: [PHP-DB] Learning PHP Sessions
* session_register('myvar'); creates a session var called $myvar
* session_start(); needs to be called from the top of each script that will need the
session var
$myvar
* session_destroy('myvar'); rids you of $myvar completely.
* session_destroy('HTTP_SESSION_VARS'); rids you off *all* currently registered
session vars
Note that a variable used in this way is refered to as 'myvar' and referenced a
snormal within the
script as: $myvar
HTH you out.
Russ
On Wed, 31 Oct 2001 09:55:33 -0600 Steve Cayford [EMAIL PROTECTED] wrote:
This is really off-topic for this list, but...
From my understanding of sessions, you really don't want session_start()
in an if{} block. Every time you hit this script, it will have no memory
of any session variables until you call session_start().
-Steve
On Tuesday, October 30, 2001, at 02:30 PM, Matthew Tedder wrote:
?php
/*
Hi,
I'm new to PHP and am having trouble understanding how to use PHP
sessions. My book tells in near the beginning how to start them and
register
session variables, but I can't figure out how to destroy a session or
later
read those session variables. I'm also trying to do this across
frames, but
can't even get it to work within a single page.
Here's what I've learned so far and what my problems are:
*/
/* To start a session */
session_start();
/* To register a session variable */
session_register(myvar);
$myvar = some value;
/*
PROBLEM #1: From the above commands, I get a $PHPSESSID that seems to
be
globally available for use, but I cannot seem to read my values back
out of
the registered session variable from anywhere... I tried:
*/
print $myvar\n; /* and absolutely nothing is printed */
/* To destroy a session */
session_destroy();
/*
PROBLEM #2: This says there is no session to destroy. It's rather
strange
because I can still print the $PHPSESSID value..
I've attached my code...
*/
?
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#---#
Believe nothing - consider everything
Russ Michell
Anglia Polytechnic University Webteam
Room 1C 'The Eastings' East Road, Cambridge
e: [EMAIL PROTECTED]
w: www.apu.ac.uk/webteam
www.theruss.com
#---#
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Re: [PHP-DB] Learning PHP Sessions
one problem I see, you are trying to populate the variable after you
register it.
session_start();
$myvar = something;
session_register('myvar');
echo $myvar;
Jim Lucas
- Original Message -
From: Russ Michell [EMAIL PROTECTED]
To: Steve Cayford [EMAIL PROTECTED]
Cc: Matthew Tedder [EMAIL PROTECTED]; [EMAIL PROTECTED]
Sent: Wednesday, October 31, 2001 8:44 AM
Subject: Re: [PHP-DB] Learning PHP Sessions
* session_register('myvar'); creates a session var called $myvar
* session_start(); needs to be called from the top of each script that
will need the session var
$myvar
* session_destroy('myvar'); rids you of $myvar completely.
* session_destroy('HTTP_SESSION_VARS'); rids you off *all* currently
registered session vars
Note that a variable used in this way is refered to as 'myvar' and
referenced a snormal within the
script as: $myvar
HTH you out.
Russ
On Wed, 31 Oct 2001 09:55:33 -0600 Steve Cayford
[EMAIL PROTECTED] wrote:
This is really off-topic for this list, but...
From my understanding of sessions, you really don't want
session_start()
in an if{} block. Every time you hit this script, it will have no memory
of any session variables until you call session_start().
-Steve
On Tuesday, October 30, 2001, at 02:30 PM, Matthew Tedder wrote:
?php
/*
Hi,
I'm new to PHP and am having trouble understanding how to use PHP
sessions. My book tells in near the beginning how to start them and
register
session variables, but I can't figure out how to destroy a session or
later
read those session variables. I'm also trying to do this across
frames, but
can't even get it to work within a single page.
Here's what I've learned so far and what my problems are:
*/
/* To start a session */
session_start();
/* To register a session variable */
session_register(myvar);
$myvar = some value;
/*
PROBLEM #1: From the above commands, I get a $PHPSESSID that seems to
be
globally available for use, but I cannot seem to read my values back
out of
the registered session variable from anywhere... I tried:
*/
print $myvar\n; /* and absolutely nothing is printed */
/* To destroy a session */
session_destroy();
/*
PROBLEM #2: This says there is no session to destroy. It's rather
strange
because I can still print the $PHPSESSID value..
I've attached my code...
*/
?
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PHP Database Mailing List (http://www.php.net/)
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For additional commands, e-mail: [EMAIL PROTECTED]
To contact the list administrators, e-mail:
[EMAIL PROTECTED]
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PHP Database Mailing List (http://www.php.net/)
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
To contact the list administrators, e-mail: [EMAIL PROTECTED]
#---#
Believe nothing - consider everything
Russ Michell
Anglia Polytechnic University Webteam
Room 1C 'The Eastings' East Road, Cambridge
e: [EMAIL PROTECTED]
w: www.apu.ac.uk/webteam
www.theruss.com
#---#
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[PHP-DB] Learning PHP Sessions
?php
/*
Hi,
I'm new to PHP and am having trouble understanding how to use PHP
sessions. My book tells in near the beginning how to start them and register
session variables, but I can't figure out how to destroy a session or later
read those session variables. I'm also trying to do this across frames, but
can't even get it to work within a single page.
Here's what I've learned so far and what my problems are:
*/
/* To start a session */
session_start();
/* To register a session variable */
session_register(myvar);
$myvar = some value;
/*
PROBLEM #1: From the above commands, I get a $PHPSESSID that seems to be
globally available for use, but I cannot seem to read my values back out of
the registered session variable from anywhere... I tried:
*/
print $myvar\n; /* and absolutely nothing is printed */
/* To destroy a session */
session_destroy();
/*
PROBLEM #2: This says there is no session to destroy. It's rather strange
because I can still print the $PHPSESSID value..
I've attached my code...
*/
?
?php
/*= Check for New User Session =*/
if(!isset($PHPSESSID))
{
session_start();
session_register(UserName);
session_register(UserPage);
$UserName = guest;
$UserPage = Home;
};
/*= Main Switchboard for Pages =*/
include includes/bodyhead.html;
switch($action)
{
case Home:
ShowHome();
break;
case Login:
ShowLogin();
break;
case AuthUser:
AuthUser($UserName, $UserPassword);
break;
case Logout:
ShowLogout();
break;
default:
ShowMessage(Service Not Yet Implemented);
break;
}
include includes/bodyfoot.html;
/*= Function To Show Home Page =*/
function ShowHome()
{
include includes/home.html;
}
/*= Function To Show Login Page =*/
function ShowLogin()
{
print form type=put action=right.php\n;
print input type=hidden name=action value=AuthUser\n;
print table border=1 width=100%\n;
print trtd bgcolor=yellow align=centerUSER AUTHORIZATION/td/tr\n;
print /table\n;
print table align=center\n;
print tr\n;
print tdfont color=yellowbUser Name:/b/font/td\n;
print td align=centerinput type=text name=UserName length=16
maxlength=16/td\n;
print /tr\n;
print tr\n;
print tdfont color=yellowbPassword:/b/font/td\n;
print td align=centerinput type=password name=UserPassword length=16
maxlength=16/td\n;
print /tr\n;
print tr\n;
print td align=center /td\n;
print td align=centerinput type=submit name=UserLogin value='USER
LOGIN'/td\n;
print /tr\n;
print /table\n;
print table border=1 width=100%\n;
print trtd bgcolor=yellow align=centerUNAUTHORIZED ENTRY IS PUNISHABLE BY
LAW/td/tr\n;
print /table\n;
print /form\n;
}
/*= Function Authenticate User (from Login Page) =*/
function AuthUser($User, $User)
{
if($User == guest)
{
ShowMessage(For guest users, authorization is not required. However, priviledges
are limited.);
}
else
{
ShowMessage(Authorization Feature Not Yet Implemented);
}
}
/*= Function To Logout User =*/
function ShowLogout()
{
ShowMessage(Your Session Has Been Terminated.\nThank You for Properly Logging Out,
$UserName!);
session_destroy();
}
/*= Function To Show Generic Messages =*/
function ShowMessage($message)
{
print br\n;
print table border=2 align=center\n;
print trtd align=centerfont color=yellow$message/font/td/tr\n;
print /table\n;
}
?
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Re: [PHP-DB] Learning PHP Sessions
You do not need to destroy session variables. You can
session_unregister() them, if you'd like.
$session_start();
$foo = Hi;
session_register(foo);
Next page...
if (isset($foo))
{
echo $foo; // will print Hi if done correctly
session_unregister(foo);
}
Sessions are automatically destroyed when the client-side browser
shuts down and the garbage collector runs. If you want to force
a session deletion, use session_destroy(). Use it with caution, though,
since it's usually better to let the garbage collector do the work
periodically instead of cleaning up each session individually.
Check out http://www.php.net/manual/en/ref.session.php
'Luck
-Szii
- Original Message -
From: Matthew Tedder [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, October 30, 2001 12:30 PM
Subject: [PHP-DB] Learning PHP Sessions
?php
/*
Hi,
I'm new to PHP and am having trouble understanding how to use PHP
sessions. My book tells in near the beginning how to start them and
register
session variables, but I can't figure out how to destroy a session or
later
read those session variables. I'm also trying to do this across frames,
but
can't even get it to work within a single page.
Here's what I've learned so far and what my problems are:
*/
/* To start a session */
session_start();
/* To register a session variable */
session_register(myvar);
$myvar = some value;
/*
PROBLEM #1: From the above commands, I get a $PHPSESSID that seems to be
globally available for use, but I cannot seem to read my values back out
of
the registered session variable from anywhere... I tried:
*/
print $myvar\n; /* and absolutely nothing is printed */
/* To destroy a session */
session_destroy();
/*
PROBLEM #2: This says there is no session to destroy. It's rather
strange
because I can still print the $PHPSESSID value..
I've attached my code...
*/
?
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To contact the list administrators, e-mail: [EMAIL PROTECTED]
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