i hav a session variable.but wen i try to access it from the other page it is not showing anything.so i think session value is not working.

------User.php-------

<?php
ob_start();
@session_start();
require_once ("check.php");
createsessions($username,$password,$userid,$projectid,$projectname,$filename,$size,$allocatedmemory,$answer,$usedmemory,$Remainingmemory,$result,$data3,$abc);
include 'connection.php';
$query= mysql_query("SELECT projectassign FROM projectassign where userid=(select userid from users where username='$username' and role='2')");
mysql_error();
$num=mysql_num_rows($query);  
 ?>
 <head>  
 <body>
 <link rel="stylesheet" type="text/css" href="style.css"/>
 <script language="javascript" type="text/javascript">
        function check()
        {
            if(document.getElementById('radio[]').value == "")
            {
                alert('Please select project');
                return false;
                
            }
        }
        </script>
 <form action="upload.php" method="post">
 <table width="100%">
<tr><td><img src="Logofinalcopy.gif">
</td></tr></table><br><hr style="color: red;">
<table align="right"><tr> <td></td>
        <td align="right" style="color: navy;"><strong><?php echo "Welcome ".$_SESSION[username];?>,</strong></td><td><a href="Logout.php">Logout</a></td>
    </tr></table>  
        
 <br><br>
 <table border="1" cellspacing="0" cellpadding="0" align="center" style="width: 500px" bordercolor="red">
 <tr>
 <th></th>
 <th style="color: navy;">Projectassign</th>
 </tr>
 <?php
     $sno=1;
    while($row=mysql_fetch_array($query, MYSQL_ASSOC)){
?>
 <tr>
    <td><input name="radio" type="radio" id="radio[]" checked="checked" value="<?php echo $row['projectassign'];?>"></td> 
    <td><?php echo $row['projectassign'];?></td>
 </tr>
 <?php
   $sno=$sno+1;   
}  
?>
 </table>
 <table align="center"><td align="center">
 <input type="submit" name="Submit"  value="Submit"></td>
 </table>
 </body></head> 
 <?php
    $abc=$radio;  // session $abc which i need it in the other page
?>

------upload.php-------

<html>
<script language="javascript" type="text/javascript">
        function check()
        {
            if(document.getElementById('file').value == "")
            {
                alert('Please select a file');
                return false
            }
        }
        //function MyReload()
        //{
        //    window.location.reload();
       // } 
         </script>        

<body onload="MyReload()">    


<link rel="stylesheet" type="text/css" href="style.css"/>
<form enctype="multipart/form-data" action="upload2.php" method="post">
<table>
<tr>
<td><img src="Logofinalcopy.gif"></td>
</tr>
</table><br><hr style="color: red;">
<table>
<?php echo "<left> <br> <input type='button' value='back' onClick='history.go(-1)'></left>";
     $a = $_SESSION['abc'];             //it is not at all printing value
     echo "<strong style='color:navy'>"."<center><h2> $a  </h2></center>"."</strong>";
              
     ?> 

<tr>
	<td style="color: navy;">
		<strong>Please choose a file: </strong>
	</td> 
	<td>
		<input id="file" name="uploaded" type="file"><br>
    </td>
</tr>
<tr><td>
<input type="submit" value="upload" name="btn" onclick="return check()"></td></tr>
</table>
     
<?php
ob_start();                                                                    
@session_start();
require_once ("check.php");
createsessions($username,$password,$userid,$projectid,$projectname,$filename,$size,$allocatedmemory,$answer,$usedmemory,$Remainingmemory,$result,$data3,$abc);
include 'connection.php';

 $sql= "select * from files where uploadedby='$_SESSION[username]' and projectname='$_SESSION[abc]' ";
 mysql_error();
    $result=mysql_query($sql);
    $num=mysql_num_rows($result);
    $sql2="select allocatedmemory from projects where projectname='".$_SESSION[abc]."'"; 
    mysql_error();
    $d=mysql_query($sql2);
    $data1=mysql_result($d,0);?>
     <table><tr><td style="color: navy"><?php echo  " Allocated memory ".$data1;?></td></tr><br> 
    <?php
     $sql1="select sum(size) from files where projectname='$_SESSION[abc]'";
    mysql_error();
    $data=mysql_query($sql1);
    $usedmemory=mysql_result($data,0,"sum(size)");?>
    <tr><td style="color: navy"><?php echo "Used memory ".$usedmemory." kb"; ?></td></tr><br>
     <?php
    $data2=1024*$data1; 
     $data3=$data2-$usedmemory;?>
     <tr><td style="color: navy"><?php echo " Remaining memory ".$data3." kb";?></td></tr></table>
      <?php $answer = $_POST['radio'];                   
    ?>

<table border="1" cellspacing="0" cellpadding="0" align="center" style="width: 500px" bordercolor="red">
<tr>
<th></th> 
<th style="color: navy;">Fileid</th>
<th style="color: navy;">Filename</th>
<th style="color: navy;">Uploadedby</th>
<th style="color: navy;">Uploadeddate(Y-M-D)</th>
<th style="color: navy;">Size(in KB)</th>
</tr>
 <?php
 $i=0;
while ($i < $num) {
 $f=mysql_result($result,$i,"fileid");     
$f1=mysql_result($result,$i,"filename");
$f2=mysql_result($result,$i,"uploadedby");
$f3=mysql_result($result,$i,"uploadeddate");
$f4=mysql_result($result,$i,"size");
                             
?>
 <tr>
 <td><a href =http://localhost/Project/upload.php onclick="window.open('http://localhost/Project/download.php?f1=<?php echo $f1;?>','popup','width=550,height=400,scrollbars=no,resizable=no,toolbar=no,directories=no,location=center,menubar=no,status=no,left=370,center=0,top=300')">
    download</a></td>
<td><?php echo $f;?></td>
<td><?php echo $f1;?></td> 
<td><?php echo $f2; ?></td>
<td><?php echo $f3;?></td>
<td><?php echo $f4; ?> </td>
<!--<td><input type="submit" name="btn" value="Delete"</td>--></tr>
<?php
    $i++;
    }
?>
</table>


</form></body></html>

try puttinging @session_start etc before the html.

<tr>
    <td><input name="radio" type="radio" id="radio[]" checked="checked" value="<?php echo $row['projectassign'];?>"></td> 
    <td><?php echo $row['projectassign'];?></td>
 </tr>
<?php
   $sno=$sno+1;   
}

?>
 </table>
 <table align="center"><td align="center">
 <input type="submit" name="Submit"  value="Submit"></td>
 </table>

now i had assigned radio button to a variable

$answer=$radio;
echo $answer;

i prints fine wen i click any radio button it displays that name.
so now i need to keep that $answer in session because i need the radio button value in next pages. so how can i...
thanks in advance..

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