how to use php variable in document header?

Question

i am trying to change download image name inside php header but it never works: I tried all these possibilities but non of them work. could any one tell me what i am doing wrong ?

header('Content-disposition: attachment; filename=$imageNewName");

php that download image:

<?

$file = $_GET['url'];

$imageNewName = "david_".basename($file);

//echo $imageNewName;

//download image

download($file,2000);

/*
Set Headers
Get total size of file
Then loop through the total size incrementing a chunck size
*/

function download($file,$chunks){
    set_time_limit(0);
    header('Content-Description: File Transfer');
    header('Content-Type: application/octet-stream');
    //header('Content-disposition: attachment; filename='.basename($file));
      header('Content-disposition: attachment; filename=$imageNewName");
    header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
    header('Expires: 0');
    header('Pragma: public');
    $size = get_size($file);
    header('Content-Length: '.$size);

    $i = 0;
    while($i<=$size){
        //Output the chunk
        get_chunk($file,(($i==0)?$i:$i+1),((($i+$chunks)>$size)?$size:$i+$chunks));
        $i = ($i+$chunks);
    }    
}

//Callback function for CURLOPT_WRITEFUNCTION, This is what prints the chunk
function chunk($ch, $str) {
    print($str);
    return strlen($str);
}

//Function to get a range of bytes from the remote file
function get_chunk($file,$start,$end){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $file);
    curl_setopt($ch, CURLOPT_RANGE, $start.'-'.$end);
    curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
    curl_setopt($ch, CURLOPT_WRITEFUNCTION, 'chunk');
    $result = curl_exec($ch);
    curl_close($ch);
}

//Get total size of file
function get_size($url){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HEADER, true);
    curl_setopt($ch, CURLOPT_NOBODY, true);
    curl_exec($ch);
    $size = curl_getinfo($ch, CURLINFO_CONTENT_LENGTH_DOWNLOAD);
    return intval($size);
}
?>

You're opening the string with a single quote and closing it with a double quote... — Marty McVry
– Marty McVry, Commented Sep 7, 2013 at 18:25
There is an error in your code. It should be visible when you open the file. If it is not then you need to configure PHP to show errors. — Sverri M. Olsen
– Sverri M. Olsen, Commented Sep 7, 2013 at 18:26

Sebastian Neira · Accepted Answer · 2013-09-07 18:25:57Z

1

You should write this line as follows:

header('Content-disposition: attachment; filename='.$imageNewName);

Therefore, the string is closed and $imageNewName is concatenated to it.

answered Sep 7, 2013 at 18:25

Sebastian Neira

5642 silver badges7 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

user1788736 Over a year ago

i tried this the image start downloading but with the name of script that i call is used for new image name! The name of imaged to be saved becomes script.php but i want it the name of image to be whatever is in $imageNewName!

Sebastian Neira Over a year ago

Sorry, but I can't understand what you're trying to say.

user1788736 Over a year ago

thanks i had to pass $imageNewName variable to the function that is why your solution was not working!

Sebastian Neira Over a year ago

Haha, that kind of stuff happens :P

Collectives™ on Stack Overflow

how to use php variable in document header?

1 Answer 1

4 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Related