PHP - Clarification On Headers Already Sent

Hello, I'm just starting to learn PHP, and I have a few questions.

First is if PHP's HttpRequest::send function uses the client's browser or the server it's being hosted on. My objective is to create a sort of proxy system, where I would submit parameters to my site, as in: www.MySite.com/relay.php?param1=X&param2=X. I need the relay.php to send all those parameters over to www.BlockedSite.com/para1=X&param2=X . Since the final destination is blocked by web filters, I need the server to send that request, not my browser. And that site also returns messages, and I need to display them. So I'm wondering if HttpRequest::send is executed client side, or server side. And in this case, I'll be using the GET method.

Second question is how I can simulate cookies data in the HttpRequest::send function. Certain cookie data is stored, and the site will request that in order to authenticate, but I can extract the data from the cookies and supply it to my relay.php. I will be using the POST method in this second example.

Third question is repeating the HTTP request a certain number of times (POST method). Is it possible to do this without user input? For example, a php script will start either with a timer or a user input, and then be able to repeatedly send and process HTTP requests after the user has closed their browser.

Thanks in advance for any clarifications you can provide. As I stated, I'm just starting to learn PHP, and I'm not sure if my objectives can be completed using this language. I'm used to Javascript and C/C++, and those are obviously impossible to use to try to do stuff like this.

My error:

Code: [Select]
Warning: Cannot modify header information - headers already sent by (output started at /www/zxq.net/w/e/b/webaskius/htdocs/index.php:7) in /www/zxq.net/w/e/b/webaskius/htdocs/functions.php on line 6

Now, I can't quite figure out why it's doing this. The section of code that is causing this problem is above any HTML tags, at the very beginning of the file.


<?php 
include('functions.php'); 
?>
<link href="style.css" rel="stylesheet" type="TEXT/CSS">
<img src="logo.png" border="0">
<div id="maincontent">


As you can see, the functions that cause this error are at the VERY beginning of my file. This is where they are called within index.php:


if(mysql_num_rows($query_verify_login) > 0)
{
        create_cookie(10000, 'user', $username);
redirect('index.php');
}
else
{
       echo 'Woops! You\'ve entered in the wrong username and password combination!';
}


And finally, my functions:


<?php

//our cookie creator function
function create_cookie($time, $name, $data)
{
setcookie($name, $data, time()+$time);
}

function redirect($url)
{
header('Location: '. $url .'');
}

function get_replies($id)
{
//set query to find posts that match our id
$query_get_replies = mysql_query("SELECT * FROM replies WHERE to = {$id}");

return mysql_num_rows($query_get_replies);
}

?>

Hi
I am getting the following php error that is on all my pages and it works fine on the other pages except index.php
Code: [Select]
<?php
session_start();
include 'includes/conn_db.php';
  if (isset($_POST['submit'])) {
    
    if (empty($_POST['userName'])) {
      $u = FALSE;
      $nouser = '<font color="red" size="2" face="arial">You forgot to enter your username!</font>';
    } else {
    $u = $_POST['userName'];
    }  
    if (empty($_POST['userPassword'])) {
      $p = FALSE;
      $nopass = '<font color="red" size="2" face="arial">You forgot to enter your password!</font>';
    } else {
    $p = $_POST['userPassword'];
    } 
    $errorMessage = $nouser . "<br>" . $nopass;
    if ($u && $p) {
    $query = "SELECT * from clients WHERE email = '$u' AND pword = '$p'";
$result = mysql_query($query, $conn);
while ($row = mysql_fetch_assoc($result)){
if ($u == $row["email"] && $p == $row["pword"]) {
  $query_name = "SELECT * FROM clients WHERE email = '$u' AND pword = '$p'";
    $result_name = @mysql_query ($query_name);
    while ($row_name = mysql_fetch_assoc($result_name)){
$client_id_out = $row_name['client_id'];
    $firstname_out = $row_name['firstname'];
    $lastname_out = $row_name['lastname'];
    
    


// Create sessions
$_SESSION['client_id'] = $client_id_out;
    $_SESSION['firstname'] = $firstname_out;
    $_SESSION['lastname'] = $lastname_out;
   
    
    ob_end_clean();
    header ("Location: myaccount.php");
    exit();
    }} } } }
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE8" />
    <title></title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <meta http-equiv="Content-Style-Type" content="text/css" />
    <link href="style.css" rel="stylesheet" type="text/css" />
    <link href="layout.css" rel="stylesheet" type="text/css" />

    <script src="js/jquery-1.3.2.min.js" type="text/javascript"></script>

    <script src="js/cufon-yui.js" type="text/javascript"></script>

    <script src="js/cufon-replace.js" type="text/javascript"></script>

    <script src="js/Futura_Bk_BT_400.font.js" type="text/javascript"></script>

    <script src="js/Futura_XBlk_BT_400.font.js" type="text/javascript"></script>

    <!--[if lt IE 7]>
   <script type="text/javascript" src="js/ie_png.js"></script>
   <script type="text/javascript">
       ie_png.fix('.png');
   </script>
<![endif]-->
</head>

Thanks

Lional

I have a form as a php include and it's giving me this error:

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/altimusw/public_html/www.csmsolution.com/register.php:6) in /home/altimusw/public_html/www.csmsolution.com/core.php on line 17

Here is the main page that includes the php include:

<!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>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>CSM Solution </title>
<style type="text/css">
<!--
#Layer1 {
position:absolute;
left:100px;
top:70px;
width:800;
height:62px;
z-index:1;
}
.style1 {
font-family: Arial, Helvetica, sans-serif;
color: #535959;
font-size: 12px;
}
-->
</style>
</head>
<body>
<div id="Layer1">
  <table width="800" border="0" cellspacing="0" cellpadding="0">
    <tr>
      <td height="97"><img src="images/header.jpg" width="800" height="59" border="0" usemap="#Map" /><br />
      <img src="images/navbar.jpg" width="800" height="38" border="0" usemap="#Map2" />
      <map name="Map2" id="Map2">
        <area shape="rect" coords="506,1,552,26" href="contact.php" /><area shape="rect" coords="459,1,502,26" href="form.php" /><area shape="rect" coords="396,-1,455,25" href="login.php" />
        <area shape="rect" coords="357,0,393,26" href="index.php" />
      </map>
      </td>
    </tr>
    <tr>
      <td><img src="images/welcome_img.jpg" width="131" height="21" /></td>
    </tr>
    <tr>
      <td><?php include("form.php"); ?></td>
    </tr>
    <tr>
      <td><img src="images/placeholderclouds_bottem.jpg" width="800" height="60" /></td>
    </tr>
  </table>
</div>
</body>
</html>

Here is the Core.php the error is referring to:

<?php
//CSM Solution Core. Rahul Parkar 2010
$_config = array();
$_config['db_type'] = "mysql";
$_config['db_server'] = "localhost";
$_config['db_username'] = "altimusw_csm";
$_config['db_password'] = ']17=rXh7tJ0~';
$_config['db_database'] = "altimusw_csm";
$_config['db_tbl_prefix'] = '';
$_config['user_table'] = "customers";
$_config['user_username'] = "username";
$_config['user_password'] = "password";
$_config['user_active'] = "approved";
$_config['user_role1'] = "prirole";
$_config['user_role2'] = "secrole";
$_config['pass_hash_func'] = "SHA1";
session_start();

function fetch_row($query)
{
        build_connection($db);
        sql_exec($db, $query, $result);
        sql_fetchone($result, $row);
        finish_connection($db);
        return $row;
}
 
function build_connection(&$db)
{
global $_config;
if ($_config['db_type'] == "mysql")
{
$db = mysql_connect($_config['db_server'], $_config['db_username'], $_config['db_password']) or die(mysql_error());
mysql_select_db($_config['db_database'], $db) or die(mysql_error());
}
}
 
function sql_exec(&$db, $query, &$result)
{
        global $_config;
        if ($_config['db_type'] == "mysql")
              $result = mysql_query($query, $db) or die(mysql_error() . "/$query");
}
 
function sql_fetchone(&$result, &$row)
{
global $_config;
      if ($_config['db_type'] == "mysql")
      {
              $row = mysql_fetch_assoc($result);
              @mysql_free_result($result);
      }
}

function sql_do(&$db, $query)
{
global $_config;
sql_exec($db, $query, $noclue);
finish_connection($db);
}

function finish_result(&$result)
{
global $_config;
if ($_config['db_type'] == "mysql")
@mysql_free_result($result);
}

function finish_connection(&$db)
{
global $_config;
if ($_config['db_type'] == 'mysql')
mysql_close($db);
}
 
function check_auth($username, $password)
{
global $_config;
      $row = fetch_row("SELECT `" . $_config['user_active'] . "`, `" . $_config['user_password'] . "`, " . $_config['pass_hash_func'] . "('" . $password . "') AS `passcheck`, `fname`, `lname` FROM `" . $_config['user_table'] . "` WHERE `" . $_config['user_username'] . "`='" . $username . "' LIMIT 1");
      if (!$row[$_config['user_active']]) { return -1; }
      else
      {
              if ($row[$_config['user_active']] != 1) { return -2; }
              else if ($row[$_config['user_password']] == $row['passcheck'])
              {
                      $_SESSION['username'] = $username;
                      $_SESSION['fname'] = $row['fname'];
  $_SESSION['lname'] = $row['lname'];
                      return 1;
              }
              else
              {
                      return -1;
              }
      }
}
 
function load_access()
{
global $_config;
        if ($_SESSION['username'])
        {
                $row = fetch_row("SELECT `" . $_config['user_role1'] . "` FROM `" . $_config['user_table'] . "` WHERE `" . $_config['user_username'] . "`='" . $_SESSION['username'] . "' LIMIT 1");
                $role1 = $row[$_config['user_role1']];
                $_SESSION['role1'] = $role1;
        }
        else
        {
                return -1;
        }
}

function has_level()
{
for ($i = 0; $i < func_num_args(); $i++)
{
if (func_get_arg($i) == $_SESSION['role1']) { return 1; }
}
return 0;
}
?>