problem using session to insert foreign key

[surajrasaq]

hello pls somebody help me with this,i am trying to use a session to insert in to the database a user_id of a user who is posting a topic in to the topic table to act as a foreign key in the topic table. but i kept getting 0 in the user_id column instead of the real userid below is my code.

<?php require_once('Connections/forum_con.php'); ?>
<?php
//initialize the session

  session_start();
  
require_once('Connections/con_user.php');

// ** Logout the current user. **
$logoutAction = $_SERVER['PHP_SELF']."?doLogout=true";
if ((isset($_SERVER['QUERY_STRING'])) && ($_SERVER['QUERY_STRING'] != "")){
  $logoutAction .="&". htmlentities($_SERVER['QUERY_STRING']);
}

if ((isset($_GET['doLogout'])) &&($_GET['doLogout']=="true")){
  //to fully log out a visitor we need to clear the session varialbles
  $_SESSION['MM_Username'] = NULL;
  $_SESSION['MM_UserGroup'] = NULL;
  $_SESSION['PrevUrl'] = NULL;
  $_SESSION['USERID'] = $data;
  unset($_SESSION['MM_Username']);
  unset($_SESSION['MM_UserGroup']);
  unset($_SESSION['PrevUrl']);
  unset($_SESSION['USERID']);
  $logoutGoTo = "main.php";
  if ($logoutGoTo) {
    header("Location: $logoutGoTo");
    exit;
  }
}
?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "") 
{
  if (PHP_VERSION < 6) {
    $theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
  }

  $theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);

  switch ($theType) {
    case "text":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;    
    case "long":
    case "int":
      $theValue = ($theValue != "") ? intval($theValue) : "NULL";
      break;
    case "double":
      $theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
      break;
    case "date":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;
    case "defined":
      $theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
      break;
  }
  return $theValue;
}
}

$colname_Recordset1 = "-1";
if (isset($_SESSION['MM_Username'])) {
  $colname_Recordset1 = $_SESSION['MM_Username'];
}
mysql_select_db($database_forum_con, $forum_con);
$query_Recordset1 = sprintf("SELECT user_id, username, First_Name, last_name FROM register_user WHERE username = %s", GetSQLValueString($colname_Recordset1, "text"));
$Recordset1 = mysql_query($query_Recordset1, $forum_con) or die(mysql_error());
$row_Recordset1 = mysql_fetch_assoc($Recordset1);
$totalRows_Recordset1 = mysql_num_rows($Recordset1);

$editFormAction = $_SERVER['PHP_SELF'];
if (isset($_SERVER['QUERY_STRING'])) {
  $editFormAction .= "?" . htmlentities($_SERVER['QUERY_STRING']);
}


if ((isset($_POST["MM_insert"])) && ($_POST["MM_insert"] == "form1")) {
	$insertSQL = sprintf("INSERT INTO topic (subject, body, username, user_id) VALUES (%s, %s, %s, %d)",
                       GetSQLValueString($_POST['title'], "text"),
                       GetSQLValueString($_POST['message'], "text"),
					   GetSQLValueString($_SESSION['MM_Username'], "text"),
					   $_SESSION['$data'], "int" );
	

  mysql_select_db($database_con_user, $con_user);
  $Result1 = mysql_query($insertSQL, $con_user) or die(mysql_error());

  $insertGoTo = "agricmater.php";
  if (isset($_SERVER['QUERY_STRING'])) {
    $insertGoTo .= (strpos($insertGoTo, '?')) ? "&" : "?";
    $insertGoTo .= $_SERVER['QUERY_STRING'];
  }
  header(sprintf("Location: %s", $insertGoTo));
}
?>

[sourcebits]

Please see where $_SESSION[$data] is set. If it is set correctly.

And instead of $_SESSION, "int"
you may write and $_SESSION[$data], "int" and see.

[surajrasaq]

thank you, but i av try everything i know nothing seems to be working....what exactly you mean by $SESSION,"int" is set....pls help me out am a newbie in php.