Please tell me how to resolve this.....

hkboey

Warning: Cannot add header information - headers already sent by (output started at c:\apache\htdocs\list_fileall.php:4) in c:\apache\htdocs\list_fileall.php on line 30

😕

rachel2004

Check your code for anything that you are outputtting before your call to the header() function. If you do have some output code before header(), rewrite your code to put that output after the header call or use output buffering before the header() function call.

hkboey

Sorry Im very new to php... but what is outputting? can you give me some examples of it?

tsinka

Hi,

output means anything that might be sent to the browser before the header is sent, like an echo or often that there are empty lines in front of the PHP block.

Post the code.

Example:


<?PHP
echo "Hi";
header("Location: somewhere.php");
exit;
?>


<?PHP
session_start();
?>

when using session cookies.

In both examples there is an empty line in front of <?PHP. In the first example the echo "Hi" will mess up thing, too.

Thomas

hkboey

Thanks Thomas...

Oops.. Im getting confused now. Why is the simple echo "Hi" will mess thing up?

Anyway.. what Im trying to do here is to force the download link of an image to be downloaded in a pop up window instead of viewing it in the browser.

Here's my code... please help pointing out what is wrong.... 😕

<?php
$file = $f_name;
$folder = "upload/";
$total = $folder . $file;

Header("Content-Type: application/force-download");
Header("Content-Length: " . filesize($total));
Header("Content-Disposition: attachment; filename=" . $file);
readfile($total);

Thanks in advance

tsinka

Hi,

please post the complete script as attachment (rename it to .txt).

Where does $f_name come from ?

In order to test the data modify it like this:

<?php 
$file = $f_name; 
$folder = "upload/"; 
$total = $folder . $file; 
$fsize = filesize($total);

echo "The file data:<br>Filename: $file<br>with path: $total<br>size: $fsize<br>\n";

//Header("Content-Type: application/force-download"); 
//Header("Content-Length: " . filesize($total)); 
//Header("Content-Disposition: attachment; filename=" . $file); 
//readfile($total); 
?>

Thomas

hkboey

Hey.. thanks for the tips(txt thingy). You're really helpful, Thomas. Anyway, Im not in the office right now and will test and tell you the result tomorrow. By the way, $f_name is from another link.

The other page has the link as ...download.php?file=$f_name.. then will go to the script I posted to you.. is that the correct way by the way?

tsinka

Hi,

in this case use $_GET to get the value of the file parameter.

if (isset($_GET['file']) && $_GET['file'] != "") {
  $fname = $_GET['file'];  

  $folder = "upload/";  

  $total = $folder . $fname;  

  $fsize = filesize($total);
  header("Content-Type: application/force-download"); 
  header("Content-Length: " . filesize($total)); 
  header("Content-Disposition: attachment; filename=" . $fname); 
  readfile($total); 
} else {
  echo "No File specified";
}

Thomas

hkboey

Hey Thomas...
it works like charm now... that's very informative.
And you're really helpful... thanks a lot!

hkboey

Need another help... let's say if I want to click on the image link, then it will pop up a new window and load that particular image. I know this can be easily done by add target="_new" to the link, but let's say what if i want to add control to the pop up window, how can I do this? Say, I dont want the pop up window to have toolbar,no resize and status bar?

I also know this could be done with the aid of Javascript.. but can php do this? please help...