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Please help with problem


adamjnz

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I am having a 'Cannot modify header information - headers already sent' problem. I have read the other posts about the cause being trying to send header information AFTER the HTML starts.


I have checked my code and the line it is erroring on is BEFORE the HTML starts. Any idea what would cause this?

[code]<?php require_once('../Connections/ppl_frontend.php'); ?>
<?php require_once('../Connections/ppl_frontend.php'); ?>
<?php
//initialize the session
session_start();

// ** 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_unregister('MM_Username');
  session_unregister('MM_UserGroup');
    
  $logoutGoTo = "./";
  if ($logoutGoTo) {
    header("Location: $logoutGoTo");
    exit;
  }
}
?>
<?php
session_start();
$MM_authorizedUsers = "Administrator";
$MM_donotCheckaccess = "false";

// *** Restrict Access To Page: Grant or deny access to this page
function isAuthorized($strUsers, $strGroups, $UserName, $UserGroup) {
  // For security, start by assuming the visitor is NOT authorized.
  $isValid = False;

  // When a visitor has logged into this site, the Session variable MM_Username set equal to their username.
  // Therefore, we know that a user is NOT logged in if that Session variable is blank.
  if (!empty($UserName)) {
    // Besides being logged in, you may restrict access to only certain users based on an ID established when they login.
    // Parse the strings into arrays.
    $arrUsers = Explode(",", $strUsers);
    $arrGroups = Explode(",", $strGroups);
    if (in_array($UserName, $arrUsers)) {
      $isValid = true;
    }
    // Or, you may restrict access to only certain users based on their username.
    if (in_array($UserGroup, $arrGroups)) {
      $isValid = true;
    }
    if (($strUsers == "") && false) {
      $isValid = true;
    }
  }
  return $isValid;
}

$MM_restrictGoTo = "login.php";
if (!((isset($_SESSION['MM_Username'])) && (isAuthorized("",$MM_authorizedUsers, $_SESSION['MM_Username'], $_SESSION['MM_UserGroup'])))) {  
  $MM_qsChar = "?";
  $MM_referrer = $_SERVER['PHP_SELF'];
  if (strpos($MM_restrictGoTo, "?")) $MM_qsChar = "&";
  if (isset($QUERY_STRING) && strlen($QUERY_STRING) > 0)
  $MM_referrer .= "?" . $QUERY_STRING;
  $MM_restrictGoTo = $MM_restrictGoTo. $MM_qsChar . "accesscheck=" . urlencode($MM_referrer);
  header("Location: ". $MM_restrictGoTo);
  exit;
}
?>
<?php
mysql_select_db($database_ppl_frontend, $ppl_frontend);
$query_admin = "SELECT * FROM ppl_admin";
$admin = mysql_query($query_admin, $ppl_frontend) or die(mysql_error());
$row_admin = mysql_fetch_assoc($admin);
$totalRows_admin = mysql_num_rows($admin);

mysql_select_db($database_ppl_frontend, $ppl_frontend);
$query_products = "SELECT * FROM ppl_products";
$products = mysql_query($query_products, $ppl_frontend) or die(mysql_error());
$row_products = mysql_fetch_assoc($products);
$totalRows_products = mysql_num_rows($products);

mysql_select_db($database_ppl_frontend, $ppl_frontend);
$query_orders = "SELECT * FROM ppl_orders ORDER BY orderID DESC";
$orders = mysql_query($query_orders, $ppl_frontend) or die(mysql_error());
$row_orders = mysql_fetch_assoc($orders);
$totalRows_orders = mysql_num_rows($orders);
?>
<?php
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
{
  $theValue = (!get_magic_quotes_gpc()) ? addslashes($theValue) : $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;
}

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

if ((isset($_POST["MM_insert"])) && ($_POST["MM_insert"] == "add_user")) {
  $insertSQL = sprintf("INSERT INTO ppl_user_products (username, productID, product_price, product_quantity) VALUES (%s, %s, %s, %s)",
                       GetSQLValueString($_POST['username'], "text"),
                       GetSQLValueString($row_products['productID'], "int"),
                       GetSQLValueString($row_products['default_price'], "int"),
                       GetSQLValueString($row_products['default_quantity'], "int"));

  mysql_select_db($database_ppl_frontend, $ppl_frontend);
  $Result1 = mysql_query($insertSQL, $ppl_frontend) or die(mysql_error());
} ?>
<?php } while ($row_products = mysql_fetch_assoc($products)); ?>
<?php
if ((isset($_POST["MM_insert"])) && ($_POST["MM_insert"] == "add_user")) {
  $insertSQL = sprintf("INSERT INTO ppl_users (username, password, access, email, real_name, company, post_add1, post_add2, post_add_sub, post_add_city, ship_add1, ship_add2, ship_add_sub, ship_add_city) VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)",
                       GetSQLValueString($_POST['username'], "text"),
                       GetSQLValueString($_POST['password'], "text"),
                       GetSQLValueString($_POST['access'], "text"),
                       GetSQLValueString($_POST['email'], "text"),
                       GetSQLValueString($_POST['real_name'], "text"),
                       GetSQLValueString($_POST['company'], "text"),
                       GetSQLValueString($_POST['post_add1'], "text"),
                       GetSQLValueString($_POST['post_add2'], "text"),
                       GetSQLValueString($_POST['post_add_sub'], "text"),
                       GetSQLValueString($_POST['post_add_city'], "text"),
                       GetSQLValueString($_POST['ship_add1'], "text"),
                       GetSQLValueString($_POST['ship_add2'], "text"),
                       GetSQLValueString($_POST['ship_add_sub'], "text"),
                       GetSQLValueString($_POST['ship_add_city'], "text"));

  mysql_select_db($database_ppl_frontend, $ppl_frontend);
  $Result1 = mysql_query($insertSQL, $ppl_frontend) or die(mysql_error());

  $insertGoTo = "users.php";
  if (isset($_SERVER['QUERY_STRING'])) {
    $insertGoTo .= (strpos($insertGoTo, '?')) ? "&" : "?";
    $insertGoTo .= $_SERVER['QUERY_STRING'];
  }
  header(sprintf("Location: %s", $insertGoTo));
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>etc etc etc[/code]
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[!--quoteo(post=365453:date=Apr 17 2006, 04:41 PM:name=ypirc)--][div class=\'quotetop\']QUOTE(ypirc @ Apr 17 2006, 04:41 PM) [snapback]365453[/snapback][/div][div class=\'quotemain\'][!--quotec--]
If your code is spitting out another error that counts as html too.[/quote]
I don't know what this means

[!--quoteo(post=365453:date=Apr 17 2006, 04:41 PM:name=ypirc)--][div class=\'quotetop\']QUOTE(ypirc @ Apr 17 2006, 04:41 PM) [snapback]365453[/snapback][/div][div class=\'quotemain\'][!--quotec--]Also, why are you initializing the session twice?[/quote]

Didn't know I was
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It means if your code has an error and complains about it to the browser, it is sending headers. Also, if you look at your code you have session_start() twice...remove the second one and that will probably solve your problem.
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[!--quoteo(post=365456:date=Apr 17 2006, 05:00 PM:name=ypirc)--][div class=\'quotetop\']QUOTE(ypirc @ Apr 17 2006, 05:00 PM) [snapback]365456[/snapback][/div][div class=\'quotemain\'][!--quotec--]
It means if your code has an error and complains about it to the browser, it is sending headers. Also, if you look at your code you have session_start() twice...remove the second one and that will probably solve your problem.
[/quote]

Still get same error
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