PHP - Moving Data Around With Session Variables Or Something Else?

Hey all,

I am having a situation where I have a singleton class with a static array in it.  I insert an element into that array, and then I redirect the user to another page.  At that page, I then retrieve that array (it's stored in the session vars), but the array is then empty when I retrieve it.  I can't figure out why.

Here are some pertinent code snippets.

First, the class with the static array:

class Logger
{

private static $instance = NULL;

private static $messages = array();

//Private constructor to prevent this class from being instantiated multiple times

private function __construct()

{

}

//The clone function is private to prevent cloning of this class

private function __clone()

{

}

//Returns the singleton instance of this class

public static function GetInstance()

{

if (!self::$instance)

{

self::$instance = new Logger;

}

return self::$instance;

}

public static function GetMessageCount()

{

return count(self::$messages);

}

public static function LogMessage($new_message)

{

self::$messages[] = $new_message;

}

public static function GetMessages()

{

return self::$messages;

}

public static function ClearMessages()

{

self::$messages = array();

}
}


Here is the code where I insert something into the aformentioned array (the process is that a user tries to log in, but the login fails, and so we insert a message into the array saying that the login credentials failed).


//Retrieve the message logging instance from the session data to be able to pass messages to the user.
$message_log = $_SESSION['user_messages'];
$user = $_SESSION['user_account'];

//Create a new instance of the database management class and
//try to connect to the database
$dbm = new DBM();
if ( !$dbm->isConnected() )
{

$message_log::LogMessage("We are sorry, but we are unable to access the database at this time.  Please try again later.");
}
else
{

//Retrieve the user login information

$useremail_dirty = $_POST['useremail'];

$password_dirty = $_POST['userpassword'];

//Check to see if the email we were given exists in the database, and if the password matches

$doesPasswordMatch = $dbm->doesPasswordMatch ( $useremail_dirty, $password_dirty );

if ( $doesPasswordMatch )

{

//Correct login information was received.  Login the user and redirect appropriately.

$user->Login();

header ( "Location: ".BASE_URL."/userpage.php" );

exit;

}

else

{

//If an incorrect email or password was given, report that information to the user.

$message_log::LogMessage("Incorrect login information.");

}
}

//The user has failed to login.  Redirect to the appropriate page.
header ( "Location: ".BASE_URL."/loginfailed.php" );


And finally, given an unsuccessful login attempt, this is where I pick back up the array of messages to display the messages to the user:

$message_log = $_SESSION['user_messages'];
$all_messages = $message_log::GetMessages();

print $message_log::GetMessageCount()."<br>";
print count($all_messages)."<br>";

foreach ($all_messages as $message_string)
{

$prepared_string = prepare_text_for_html_output($message_string);

echo $prepared_string."<br>";
}

$message_log::ClearMessages();


Unfortunately, the "all_messages" variable has nothing in it...it's like the messages that I logged in the previous PHP script never even existed.  I am calling session_start, so don't worry about that (even though it's not seen in these code snippets).  What could be going wrong?

Hey, Im new here (First post) and I need some help with variables. At the moment I have one main file where all variables have been defined and this page has been included in every page that has been made for the rest of the site.

 It defines them like this:

Code: [Select]
$query="SELECT * FROM user WHERE name='$name'";
        $result=mysql_query($query);
        $result=mysql_fetch_array($result);
        $name=$result["name"]
        $money=$result["money"];
But users are able to change variables using the URL e.g www.test.com/index.php?money=1000000. That would then say they have 1,000,000 money on that page but when they change the page it will go back to the amount that is in the database. I would like to stop this as its not good for the site and there has to be a better way to be doing this. I would like to learn about this so any help would be great.

I would like it if someone could add me on skype or somthing like that to help me do this faster then posting on a forum.

Thank you very much,
Alex

they recently reset my website so my php.ini file has been adjusted. One of my sites is no longer passing a session variable to the next page. I am sure its one of the settings being reset. here is the data from my phpinfo file. Anything that looks off to anyone?

session
Session Support    enabled
Registered save handlers    files user sqlite
Registered serializer handlers    php php_binary wddx

Directive   Local Value   Master Value
session.auto_start   Off   Off
session.bug_compat_42   On   On
session.bug_compat_warn   On   On
session.cache_expire   180   180
session.cache_limiter   nocache   nocache
session.cookie_domain   no value   no value
session.cookie_httponly   Off   Off
session.cookie_lifetime   0   0
session.cookie_path   /   /
session.cookie_secure   Off   Off
session.entropy_file   no value   no value
session.entropy_length   0   0
session.gc_divisor   100   100
session.gc_maxlifetime   1440   1440
session.gc_probability   1   1
session.hash_bits_per_character   4   4
session.hash_function   0   0
session.name   PHPSESSID   PHPSESSID
session.referer_check   no value   no value
session.save_handler   files   files
session.save_path   /home/users/web/b535/ipw.plevtech/public_html/cgi-bin/tmp   /home/users/web/b535/ipw.plevtech/public_html/cgi-bin/tmp
session.serialize_handler   php   php
session.use_cookies   On   On
session.use_only_cookies   Off   Off
session.use_trans_sid   0   0

Hi.  I'm brand new to this forum, so sorry if I do something wrong...

I'm someone who has thought myself to code in php to add dynamic objects to my basic static websites.  I have had no formal education.  This is not my first project however. 

I'm having problems with session variables working fine up to a point when I call a new file and then all my session variables are lost.  I have tried everything, but cannot keep them alive when I get into this or any other new file.

I display a form, get user data submitted, then display a next form and after the user submits this next form all the session variables are lost.

Anyone have any idea what is killing my session variables?

Thanks in advance.

...anyone know anything about Internet Explorer not printing values from session variables.  It works on Firefox but not on Internet Explorer.  The session variable value works find on the web page but click on Print preview and it dissapears and will not print.