How Can I Download Files from an FTP Server Directly to a Browser Using PHP?

Downloading Files from FTP Server to Browser with Content-Length Header

You can download a file directly to the user's browser without storing it on the server by removing the output buffering from the code.

<code class="php">ftp_get($conn_id, "php://output", $file, FTP_BINARY);</code>

To add the Content-Length header, you'll need to obtain the file size first using ftp_size():

<code class="php">$conn_id = ftp_connect("ftp.example.com");
ftp_login($conn_id, "username", "password");
ftp_pasv($conn_id, true);

$file_path = "remote/path/file.zip";
$size = ftp_size($conn_id, $file_path);

header("Content-Type: application/octet-stream");
header("Content-Disposition: attachment; filename=" . basename($file_path));
header("Content-Length: $size"); 

ftp_get($conn_id, "php://output", $file_path, FTP_BINARY);</code>

Remember to include error handling for a complete solution.

Additional Background

Refer to the resources below for further information on FTP file handling:

• List and Download Clicked Files from FTP
• PHP FTP Functions: ftp_get

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