PHP SESSION PROBLEM

jamesharry404 · 16 September 2013

How to store and retrieve session variable value in php?
I am trying to login and then show the welcome screen on successful login. After successful login validation i store a variable in session.
However, when i move from login screen to the welcome screen i am unable to retrieve the session variable value

Here is the code snippet.

in sevaklogin.php
--------------------

// Connect to the database
$link = connectToDB();

$submit = $_REQUEST['submit'];
if($submit){
session_start();
$email = $_REQUEST['email'];
$password = $_REQUEST['password'];
$query = "select * from sevaks where email ='$email' and password='$password'";
//echo $query;
$result = mysql_query($query);
//echo $result;

/* make sure data was retrieved */
$numrows = mysql_num_rows($result);
//echo $numrows;
if ($numrows == 0) {
echo "Incorrect email or password. Try again!";
$_SESSION['permission'] = '';
} else {
$permission="yes";
while($sevaks = mysql_fetch_array($result)){
$user_name = $sevaks["user name"];
print "Welcome " .$user_name;
$yatra = $sevaks["yatra"];
print " from " .$sevaks["yatra"] . " yatra";
$role = $sevaks["role"];
print " as " .$sevaks["role"] ;
print " email " .$email;
// $_SESSION['permission'] = $permission;
// $_SESSION['email'] = $email;
// $_SESSION['user_name'] = $user_name;
// $_SESSION['yatra'] = $yatra;
// $_SESSION['role'] = $role;
}
session_register('permission');
session_register('email');
session_register('user_name');
session_register('yatra');
session_register('role');
$URL="welcomesevak.php";
header ("Location: $URL");
exit;
break;
}
}
______________
webcomesevak.php
below
_______________

<?php
$submit = $_REQUEST['submit'];
if($submit){
session_start();
echo "permission=" .$permission;
echo "email=".$email;
echo "user_name=" .$user_name;
echo "yatra=" .$yatra;

echo permission .$_SESSION['permission'];
echo email .$_SESSION['email'];
echo user_name .$_SESSION['user_name'];
echo yatra .$_SESSION['yatra'];
print "Welcome " .$user_name;
print " from " .$sevaks["yatra"] . " yatra";
print " as " .$sevaks["role"] ;
print " email " .$email;

if ($permission == "yes") {
print "<html>";
print "<head>";
print "<title>Welcome Sevak</title>";
print "<link href='styles.css' rel='stylesheet' type='text/css'>";
print "</head>";
print "<body>";
print "<center>";
print "<div class='header'>";
print "Welcome user ".$_SESSION['user_name'] . " [email ".$_SESSION['email'].",role ".$_SESSION['role']."]";
print "</div>";
print "</center>";
print "<a href='medialist.php'> View Media List</a>";
print "</body>";
print "</html>";
} else {
echo "User session expired. Please login again.";
print "<a href='sevaklogin.php'> Sevak Login</a>";
}

__________________

The value of variable "permission" set in sevaklogin.php is is not accessible in the welcomesevak.php
In welcome.php the variable comes as blank.

What i am doing incorrectly?

___________________________________________
Website Designing Companies in Banglore | SEO Company in Delhi

bdt600 · 16 September 2013

Wrong:

PHP:

session_register('permission');
session_register('email');
session_register('user_name');
session_register('yatra');
session_register('role');

Use:

PHP:

$_SESSION['permission'] = $permission;

Richtig debuggen

1. Man bemerkt, dass ein Skript nicht das tut, was es soll.
2. Man schreibt an den Anfang des Scriptes die Zeile: error_reporting(-1);
3. Man verwendet ini_set('display_errors', true); damit die Fehler auch angezeigt werden.
4. Man versucht, die Stelle die daran Schuld sein kann, schonmal einzugrenzen. Falls dies nicht geht, wird zunächst das komplette Skript als fehlerhaft angesehen.
5. An markanten Stellen im Skript lässt man sich wichtige Variableninhalte ausgeben und ggf. auch in bedingten Anweisungen eine kurze Ausgabe machen, um zu überprüfen, welche Bedingung ausgeführt wurde. Wichtig bei MySQL Fehlern (...not a valid MySQL result resource...): mysqli_error() verwenden oder Abfrage ausgeben und zb mit phpmyadmin testen.
6. Schritt 5 wird so lange wiederholt, bis Unstimmigkeiten im Skript auffallen
7. Damit hat man das Problem (Unstimmigkeit) gefunden und kann versuchen diese zu beheben. Hierzu dienen dann die PHP-Dokumentation und andere Quellen als Ratgeber.
8. Lässt sich das konkrete Problem trotzdem nicht beheben, kann man in Foren um Rat fragen.
9. Das Programm läuft und man kann die Debug-Ausgaben wieder entfernen.

Cheffchen · 16 September 2013

not wrong, just last millennium :O)
de3.php.net/manual/function.session-register.php

Cheffchen

bdt600 · 16 September 2013

Of course this is wrong!
Quote from the documentation:

Caution
If you want your script to work regardless of register_globals, you need to instead use the $_SESSION array as $_SESSION entries are automatically registered. If your script uses session_register(), it will not work in environments where the PHP directive register_globals is disabled.

Nobody has register_globals turned on more

PHP SESSION PROBLEM

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Cheffchen

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