help me in php session

hello i really need help
i cant get session to work in a particular php file but it works with others here are the codes


i started with login.php

login.php

<?php

 
include("config.php");


 session_start();
 if($_SERVER["REQUEST_METHOD"] == "POST")
 {
 
// username and password sent from Form 


$myusername=addslashes($_POST['username']); 
$mypassword=addslashes($_POST['password']); 


$sql="SELECT id FROM users WHERE username='$myusername' and password='$mypassword'";
 $result=mysql_query($sql);
 $row=mysql_fetch_array($result);
 $active=$row['active'];
 $count=mysql_num_rows($result);
 




// If result matched $myusername and $mypassword, table row must be 1 row
 
if($count==1)
 {
 session_register("myusername");
 $_SESSION['login_user']=$myusername;
 


header("location: users/panel.php");
 }
 else 
{
header("Location: invalid_login.html");
 }
 }
 
?>

Code (markup):

then this will start session in

lock.php

<?php 
include('config.php');
 session_start();
 
 $user_check=$_SESSION['login_user'];
 
$ses_sql=mysql_query("select username from users where username='$user_check' ");
 
$row=mysql_fetch_array($ses_sql);
 
$login_session=$row['username'];






if(!isset($login_session))
 {
     
 header("Location: login.php");
 }


?>

Code (markup):

then the result will be showed in auth.php

<?php


include('lock.php');
 
 print $login_session; 
 
 
 ?>

Code (markup):

this result will be shown in the index page
i have a table with marks and i need to do chart and show marks

to show marks i used the code

get_marks.php and thin include it in students page to see results

<?php




include("config.php"); 


// connect to the mysql server 
$link = mysql_connect($mysql_hostname, $mysql_user, $mysql_password) 
or die ("Could not connect to mysql because ".mysql_error()); 


// select the database 
mysql_select_db($mysql_database) 
or die ("Could not select database because ".mysql_error()); 




$query  = "SELECT id, sno, maths, english, physics, servicew, ast, defstudy, nav, other FROM Marks WHERE sno = '$login_session'";
$result = mysql_query($query);




if (mysql_query($query)) {
    echo "";
} else {
    echo 'Incorrect Name: ' . mysql_error() . "\n";
}


echo "<table border='0' bordercolor='#ffffff'  width=200 cellspacing=10 CELLSPACING=0 padding-bottom: 10px style='color:#629fa8 ;font-size:15px ;font-family: Georgia; font-weight:blod; background-color:#ffffff'>
 <tr>


 </tr>";
 
while($row = mysql_fetch_array($result))
   {




   echo "<tr>";
echo "<td style='color:#2f2f2f; font-size:15px; font-family: Georgia; border-bottom:non; font-weight:normal; background-color:#ffffff'>English:</td>";




   echo "<td>" . $row['english']. "</td>";
echo "</tr>";




   echo "<tr>";
echo "<td style='color:#2f2f2f; font-size:15px; font-family: arial; font-weight:normal; background-color:#ffffff'>Mathmatics:</td>";
   echo "<td>" . $row['maths'] . "</td>";
echo "</tr>";






   echo "<tr>";
echo "<td style='color:#2f2f2f; font-size:15px; font-family: arial; font-weight:normal; background-color:#ffffff'>Physics:</td>";
   echo "<td>" . $row['physics'] . "</td>";
echo "</tr>";




   echo "<tr>";
echo "<td style='color:#2f2f2f; font-size:15px; font-family: arial; font-weight:normal; background-color:#ffffff'>Servics writing:</td>";
   echo "<td>" . $row['servicew'] . "</td>";
echo "</tr>";




   echo "<tr>";
echo "<td style='color:#2f2f2f; font-size:15px; font-family: arial; font-weight:normal; background-color:#ffffff'>AST:</td>";
   echo "<td>" . $row['ast'] . "</td>";
echo "</tr>";




   echo "<tr>";
echo "<td style='color:#2f2f2f; font-size:15px; font-family: arial; font-weight:normal; background-color:#ffffff'>Navigation:</td>";
   echo "<td>" . $row['nav'] . "</td>";
echo "</tr>";






   echo "<tr>";
echo "<td style='color:#2f2f2f; font-size:15px; font-family: arial; font-weight:normal; background-color:#ffffff'>Defence Studies:</td>";
   echo "<td>" . $row['defstudy'] . "</td>";
echo "</tr>";




   echo "<tr>";
echo "<td style='color:#2f2f2f; font-size:15px; font-family: arial; font-weight:normal; background-color:#ffffff'>Other:</td>";
   echo "<td>" . $row['other'] . "</td>";
echo "</tr>";








   }
 echo "</table>";
 


?>

Code (markup):

notice this

$query  = "SELECT id, sno, maths, english, physics, servicew, ast, defstudy, nav, other FROM Marks WHERE sno = '$login_session'";

Code (markup):

i used the $login_session to specify the logged student number and get his marks from the table
this works fine and the marks showed for everybody logged in by taking his username( which is his number ) and get the data from MYSQL


but the chart has problems why ?
i have no idea

the chart includes


phpgraphlib.php to configure it

and mysql_graph_bar.php

<?php


include("phpgraphlib.php");
$graph=new PHPGraphLib(320,170); 


include("config.php"); 


// connect to the mysql server 
$link = mysql_connect($mysql_hostname, $mysql_user, $mysql_password) 
or die ("Could not connect to mysql because ".mysql_error()); 


// select the database 
mysql_select_db($mysql_database) 
or die ("Could not select database because ".mysql_error()); 




$query  = "SELECT id, sno, maths, english, physics, servicew, ast, defstudy, nav, other FROM marks WHERE sno = '$login_session'";




$result = mysql_query($query); if ($result) {  
while ($row = mysql_fetch_assoc($result)) {  


    
$english=$row["english"];
$maths=$row["maths"];
$physics=$row["physics"];
$servicew=$row["servicew"];


$ast=$row["ast"];
$nav=$row["nav"];
$defstudy=$row["defstudy"];
$other=$row["other"];






     
//add to data areray      
$dataArray[$english]=$english; 
$dataArray[$maths]=$maths; 
$dataArray[$physics]=$physics; 
$dataArray[$servicew]=$servicew; 


$dataArray[$ast]=$ast; 
$dataArray[$nav]=$nav; 
$dataArray[$defstudy]=$defstudy; 
$dataArray[$other]=$other;


 }


}  
//configure graph
$graph->addData($dataArray);
$graph->setupXAxis(12, 'gray');
$graph->setupYAxis(12, 'gray');
$graph->setTextColor('gray');
$graph->setGridColor('236,236,236');
$graph->setDataValues(false);
$graph->setGoalLine('65');
$graph->setGoalLineColor('red');
$graph->setDataFormat('%');
$graph->setGradient("Teal", "Teal");
$graph->setBarOutlineColor("gray");
$graph->setDataValues(false);
$graph->createGraph();

Code (markup):

and this will be showed as an image in the student page by writing this code in the students page

<img src="mysql_graph_bar.php" />

Code (markup):

the problem when i put the session same as marks after (sno) i wont get anything it fails and give damaged image where the chart should be

Example: this doesn't work because i used sno = '$login_session'

$query  = "SELECT id, sno, maths, english, physics, servicew, ast, defstudy, nav, other FROM marks WHERE sno = '$login_session'";

Code (markup):

when i changed the value to a specific student number (sno) from the table (marks) it works

example student number 123456

$query  = "SELECT id, sno, maths, english, physics, servicew, ast, defstudy, nav, other FROM marks WHERE sno = '123456'";

Code (markup):

please help me to get the session result works..

 

session_start();

..needs to be directly under:

<?php

ie:

<?php
session_start();

Code (markup):

 

replace this:

'$login_session'

PHP:

for this:

\'$login_session\'

PHP:

this should fix the problem

~Mike

 

just place session_start() at the beginning. You don't actually need to use session_register().

 

Dead on. No need for session_register.