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I am trying to stream/pipe a file to the user's browser through HTTP from FTP. That is, I am trying to print the contents of a file on an FTP server.

This is what I have so far:

public function echo_contents() {                    
    $file = fopen('php://output', 'w+');             

    if(!$file) {                                     
        throw new Exception('Unable to open output');

    try {                                            
        $this->ftp->get($this->path, $file);         
    } catch(Exception $e) {                          
        fclose($file);  // wtb finally               

        throw $e;                                    


$this->ftp->get looks like this:

public function get($path, $stream) {
    ftp_fget($this->ftp, $stream, $path, FTP_BINARY);  // Line 200

With this approach, I am only able to send small files to the user's browser. For larger files, nothing gets printed and I get a fatal error (readable from Apache logs):

PHP Fatal error: Allowed memory size of 16777216 bytes exhausted (tried to allocate 15994881 bytes) in /xxx/ftpconnection.php on line 200

I tried replacing php://output with php://stdout without success (nothing seems to be sent to the browser).

How can I efficiently download from FTP while sending that data to the browser at the same time?

Note: I would not like to use file_get_contents('ftp://user:pass@host:port/path/to/file'); or similar.



Found a solution!

Create a socket pair (anonymous pipe?). Use the non-blocking ftp_nb_fget function to write to one end of the pipe, and echo the other end of the pipe.

Tested to be fast (easily 10MB/s on a 100Mbps connection) so there's not much I/O overhead.

Be sure to clear any output buffers. Frameworks commonly buffer your output.

public function echo_contents() {
    /* FTP writes to [0].  Data passed through from [1]. */
    $sockets = stream_socket_pair(STREAM_PF_UNIX, STREAM_SOCK_STREAM, STREAM_IPPROTO_IP);

    if($sockets === FALSE) {
        throw new Exception('Unable to create socket pair');

    stream_set_write_buffer($sockets[0], 0);
    stream_set_timeout($sockets[1], 0);

    try {
        // $this->ftp is an FtpConnection
        $get = $this->ftp->get_non_blocking($this->path, $sockets[0]);

        while(!$get->is_finished()) {
            $contents = stream_get_contents($sockets[1]);

            if($contents !== false) {
                echo $contents;


        $contents = stream_get_contents($sockets[1]);

        if($contents !== false) {
            echo $contents;
    } catch(Exception $e) {
        fclose($sockets[0]);    // wtb finally

        throw $e;


// class FtpConnection
public function get_non_blocking($path, $stream) {
    // $this->ftp is the FTP resource returned by ftp_connect
    return new FtpNonBlockingRequest($this->ftp, $path, $stream);

/* TODO Error handling. */
class FtpNonBlockingRequest {
    protected $ftp = NULL;
    protected $status = NULL;

    public function __construct($ftp, $path, $stream) {
        $this->ftp = $ftp;

        $this->status = ftp_nb_fget($this->ftp, $stream, $path, FTP_BINARY);

    public function is_finished() {
        return $this->status !== FTP_MOREDATA;

    public function resume() {
        if($this->is_finished()) {
            throw BadMethodCallException('Cannot continue download; already finished');

        $this->status = ftp_nb_continue($this->ftp);
Friday, November 25, 2022

try below code for that.

$curl = curl_init();
$file = fopen("ls-lR.gz", 'w');
curl_setopt($curl, CURLOPT_URL, ""); #input
curl_setopt($curl, CURLOPT_FILE, $file); #output
curl_setopt($curl, CURLOPT_USERPWD, "$_FTP[username]:$_FTP[password]");
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);


Tuesday, October 25, 2022

Try to save it locally first and then push it back to browser.

Use that code to save your file locally.

                // define some variables
        $folder_path = "YOUR FOLDER PATH";
        $local_file = "LOCAL FILE PATH";
        $server_file = "SERVER FILE PATH";

        //-- Connection Settings
        $ftp_server = "IP ADDRESS"; // Address of FTP server.
        $ftp_user_name = "USERNAME"; // Username
        $ftp_user_pass = "PASSWORD"; // Password
        #$destination_file = "FILEPATH";

        // set up basic connection
        $conn_id = ftp_connect($ftp_server);

        // login with username and password
        $login_result = ftp_login($conn_id, $ftp_user_name, $ftp_user_pass);

        // try to download $server_file and save to $local_file
        if (ftp_get($conn_id, $local_file, $server_file, FTP_BINARY)) {
            echo "Successfully written to $local_filen";
        } else {
            echo "There was a problemn";

        // close the connection

I also found this, maybe it could help you

My FTP-Server always responded "bool(false)" instead of presenting me a directory-listing. I had to add ftp_pasv($conn_id, true); right after the $login_result = ftp_login(...); line. After that it just worked fine.

Thursday, August 25, 2022

is_dir works only on the local file-system. If you want to check if a ftp-directory already exists try this:

function ftp_is_dir($ftp, $dir)
    $pushd = ftp_pwd($ftp);

    if ($pushd !== false && @ftp_chdir($ftp, $dir))
        ftp_chdir($ftp, $pushd);   
        return true;

    return false;

if($id != '') {
    if(ftp_is_dir($conn_id, "../public_html".$tem_pasta['path']."/pics/".$id)) {
    // and so on...
Saturday, December 3, 2022

// function
function ftp_mksubdirs($ftpcon,$ftpbasedir,$ftpath){
   @ftp_chdir($ftpcon, $ftpbasedir); // /var/www/uploads
   $parts = array_filter(explode('/',$ftpath)); // 2013/06/11/username
   foreach($parts as $part){
      if(!@ftp_chdir($ftpcon, $part)){
         ftp_mkdir($ftpcon, $part);
         //ftp_chmod($ftpcon, 0775, $part);
         ftp_chdir($ftpcon, $part);

// usage
$path_of_storage = '/var/www/uploads';
$newftpdir = '2013/06/11/username';

$conn_id = ftp_connect($ftpserver);
ftp_login($conn_id, $login, $pass);

Tuesday, September 27, 2022
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