PHP - Downloads And Headers

So, I have a script that works downloading a file - excerpt below:

Code: [Select]
header("Pragma: public");
header("Expires: 0");
header('Content-type: "application/octet-stream"');
header("Cache-Control: private",false);
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
$f = "Content-Disposition: attachment; filename=\"".$myfile['downloadname'].".".$myfile['ext']."\"";
header($f);
header("Content-Transfer-Encoding: binary");
header("Content-Length: ".filesize($file));
    ob_clean();
    flush();
readfile("$file");
exit();
I record elsewhere in a mysql database when the script is started.

In addition, I'd like to be able to record whether the download completes (successfully or otherwise). 

As it is, the script can run and the user press cancel and it looks like a download but isn't.

Is this possible?  If so, how?

Your help, as ever, gratefully received.

I would like to be able to add a yes/no to a field in a 'user' database when a logged in user clicks on a link to download a file.
The site I have built stores docs and applications. and my client would like to know which user has downloaded a certain application (clicked on a button to 'download' and installer file.
Is this possible?

Hi,

Firstly, apologies if this is in the wrong place in the forum to post this.

I have a website, I use PHP in various places to pull/push info from/to a mySQL database, i'm fairly happy with PHP and its uses.

I've recently started to use the Google checkout widget on the site for a proposed webstore (to go live at a later date), this has the ability to 'sell' download URL's or keys.

I like the idea of a customer being able to purchase multiple MP3 downloads and them being given a URL that gives them the links for the MP3's selected.

This is probably beyond anything i've ever done with PHP though so I need to understand the architecture........I understand that, given a list of items from the store, I can run a query to display a list of stored URL's  for those items - and I'm sure I can find code that will give me a random URL that will 'expire' after an amount of time.
My question is, how to get the list of items ordered from the google checkout?? I'm sure this has something to do with API's - but I don't know what they are, presumably there is some kind of table in Google that I can tap into to get the product info??

any help would be very much appreciated.

....oh, and i'm sure people are going to ask "why are you using Google checkout", the answer being, for me, it seems simple, effective and free! (but i'm open to suggestions.)


Darren

Hi,

I have downloads that are available for users. They can click the links to download the file. Once they do this, I have a query that updates the number of downloads that file has received. I need to create a query that adds up all the rows Total Downloads.

So for example: i have 3 rows:
Name       -       Total Downloads
First       -          2
Second       -        23
Third       -          7

Using the query for these rows would give me an amount of 32.

Any idea how to do this?

I don't want to have to create a new column to find the total number of downloads. Any other ways?

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 all,

It's probably something obvious, but perhaps someone could explain to me what is going on here...

I spent a lot of time this afternoon trying to fix what seemed to be a very odd problem, which involved an image being chucked out like so:

Code: [Select]
<?php
header("Content-Type: image/png");
echo file_get_contents("http://www.example.com/some_image.png");
?>
Except the image was coming out as corrupted, ultimately because I had some white space before this snippet (foolish, I know). The reason it took me so long to diagnose the problem was because I wasn't getting PHP errors (even though they were switched on). As far as the script was concerned, it seems I wasn't sending anything before attempting to modify the headers.

After solving the problem, I put the following little bit of code together, trying to force a header error... And yet I get nothing. It all works, and I get redirected, when I'm sure I shouldn't be. I've run this on a default install of XAMPP, and a configured CentOS server, and the same thing happens on both.

If anyone can explain to me what is going on, I would be most appreciative! There are some inline comments which should help clarify what I mean.

Code: [Select]
<?php

error_reporting(E_ALL);
ini_set("display_errors","1");

?>

<p>Hello! The very existence of this text should really have resulted in the headers being sent... Shouldn't it?</p>
<p>So I'd expect to see a "Headers already sent" message... Shouldn't I?</p>

<?php

// Headers sent?
echo "<p>";
echo "Headers ";

if(!headers_sent()) {
echo "not "; // This "not" does echo out.
}
echo "sent.</p>";

// This WILL start a session (or at least, won't throw an error)
session_start();

// This redirect WILL work, and you will never see the above messages.
header("Location: redirect.php");

// What?!

?>
Thanks!

Dave

hello,

I'm using this code:

<?php

  if (isset($_REQUEST['email']))
  {
 $name = $_REQUEST['name'] ;
 $email = $_REQUEST['email'] ;
 $code = $_REQUEST['code'] ;
 $from = $email;
    mail("email@email.com", "Winner request id: $name - code: $code",
    "From:" . $from);
    }
  $headers = "From:" . $from;
  header('Location: index.php?done');
  ?>

And I'm getting:

Code: [Select]
Warning: Cannot modify header information - headers already sent by (output started at /home/site/public_html/config.php:10) in /home/site/public_html/send.php on line 13
This worked before.

Many thanks

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;
}
?>

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 am trying to do a page redirect using the header() function. I am aware that header() must be called before any actual output is sent, either by normal HTML tags, blank lines in a file, or from PHP. and also that reading code with include, or require, functions, or another file access function, can create spaces or empty lines that are output before header() is called. thus causing a redirect failure. I have therefore used this output control function (ob_start(); ob_implicit_flush()  right at the top of my page. I am then creating the redirect like this as part of my login() function:

if($user_role == ADMIN_LEVEL || $user_role == EDITOR_LEVEL)
{
		if (!headers_sent($filename, $linenum)) 
		{
				return header("Location:http://mysite.com/dashboard.php");
				exit;
		}
		else
		{
				echo "Headers already sent in $filename on line $linenum\n" .
				  "Cannot redirect\n";
				exit;
		}
}

Unfortunately I am still getting this error:

Headers already sent in /home/steveoje/public_html/login.php on line 1 Cannot redirect

And this is what I have at the top of the login.php page:

<?php ob_start(); 
ob_implicit_flush(); 
require_once 'includes/config.php';
if(isset($_POST['submit']))
{
	login($_POST['username'], $_POST['password']);	
}
require_once "includes/header.inc.php" ?>
//other html content

So why would the redirect fail in this instance?   Thanks.
Edited by terungwa, 28 September 2014 - 05:28 AM.

Okay, I've read all the rules for Headers...still can't it to execute properly.  At the bottom is my code.  I basically want to check the database, see if the user is already registered, and redirect as appropriate (there is no HTML on my page, no info sent to the browser).  My server doesn't send any error messages.  All I get are white screens. 

Now, if I do the headers_sent()...it tells me that it's sent right after the initial connection with the database. 

The ONLY way I can get it to redirect, is if I put
<?php
header("location:index.php?msg=3");
?>
 at hte very top, but then I can't evalute...which doesn't help me much.

Here is the code (obviously, I have more...but it's sending headers in these lines)


<?php
$connection = mysql_connect("localhost","####","#####");

if (!$connection){
echo mysql_errno().": ".mysql_error()."<br/>";
exit;
}

if(!mysql_select_db("prixaurora")){
echo("Database not found<br>");
}

Hi Guys   I have recently been looking into implementing browser caching after reading this: https://developers.g...ctices/caching    There are a few things in that google article that don't make much sense to me so I'm hoping someone can clarify.   Firstly Question   The document says:   " we recommend that you configure your web server to explicitly set caching headers and apply them to all cacheable static resources"   This implies you can set caching headers for just some resources. How would you do this? Lets assume I only wanted to set caching headers for a file styles.css - would I need to output headers within the CSS file and then change the extension to .php? e.g.

<link rel="stylesheet" href="styles.php"/>

Second question   Etags have me very confused. How would you set etag headers for specific files and then generally? And if you set the etag in the header of the main php page does that mean everything gets cached?     Any help someone can provide would be very, very welcome!   Drongo

OK you fantastic PHPfreakers I'm not sure how to describe this so I hope you will understand..   I have a predicament where I set the header info to: header('Content-Type: text/html; charset=utf-8'); but later on I have a part of my site that requests an image from somewhere else using getImage() here I need to set header("Content-type: image/jpeg"); in order for the image to show correctly. but this conflicts with the previous page of headers already sent.   so I was looking for a way around this OR maybe can I load them in after the page has loaded? I have tried using Jquery to post with ajax but I don't seem to get any response the alert does not trigger for any conversation with an image.   I have tested all of this and it works as long as I don't put any OUTPUT before triggering the getImage()

<script type='text/javascript'>
	$(document).ready(function(){
		function loadImages(){										
			$.ajax({
			type: "POST",
			url: "/admin/getImage.php",
			data: {token: '<?php echo $token; ?>', chatId: '<?php echo $chat; ?>', uId: '<?php echo $uId; ?>'},
			success: function(data){		
				alert(data);
				$('#img').html(data);
			}
		});
		return false;
		}
	});
</script>

here is part of the messages page that would show the image. (just imagine there was more content etc..)

<?php 
	header('Content-Type: text/html; charset=utf-8'); 
	## OTHER GENERIC STUFF		
	$parser = new Parser($v1, $v2);			
	$convo = $parser->getConvo($token, $id);

	foreach($convo['messageGroups'] as $con)
	{	
		$chat = $con['messageGroupId'];		
			
		$uId = $con['latestMessage']['messageUid'];
		$key = $con['latestMessage']['messageKind'];						
		if($key == '3'){
										
			$image = $parser->getImage($token, $chat, $uId);
			echo $image;
		}
		
	}
?>

here is the function for getImages()

public function getImage($token, $chat, $uId){
	$this->initCURL();
	$chatter = str_replace("{{chat}}", $chat, $this->url['image']);
	$chatter = str_replace("{{uId}}", $uId, $chatter);
			
	$headerData = $this->defaultGETHeader($token);
			
	curl_setopt($this->curl, CURLOPT_URL, $chatter);
	curl_setopt($this->curl, CURLOPT_HTTPHEADER, $headerData);
			
	$output = curl_exec($this->curl);
	$this->closeCURL();
			
	header("Content-type: image/jpeg");
			
	return $output;
}

Edited by xXREDXIIIXx, 01 June 2014 - 12:18 PM.

Hi; I want to get the response headers using ob_get_contents ?   For example using file_get_contents, it is easy by accessing the variable $http_response_header like that :

<?php
$content = file_get_contents($url);
print_r($http_response_header);
?>

But how to do that using ob_get_contents without a file_get_contents ? something like for example :

<?php
ob_start();
include($path_to_script_here);
$string = ob_get_contents();
// Access the headers here
ob_end_clean();
?>

Thank you
Edited by Dareros, 07 October 2014 - 06:20 PM.