# ftp_nb_get

(PHP 4 >= 4.3.0, PHP 5)

ftp_nb_get — Retrieves a file from the FTP server and writes it to a local file (non-blocking)

### Description

int ftp_nb_get ( resource `$ftp_stream` , string `$local_file` , string `$remote_file` , int `$mode` [, int `$resumepos` ] )

ftp_nb_get() retrieves a remote file from the FTP server, and saves it into a local file.

The difference between this function and ftp_get() is that this function retrieves the file asynchronously, so your program can perform other operations while the file is being downloaded.

### Parameters

`ftp_stream`

  The link identifier of the FTP connection.

`local_file`

  The local file path (will be overwritten if the file already exists).

`remote_file`

  The remote file path.

`mode`

  The transfer mode. Must be either `FTP_ASCII` or `FTP_BINARY`.

`resumepos`

### Return Values

Returns `FTP_FAILED` or `FTP_FINISHED` or `FTP_MOREDATA`.

### Examples

Example#1 ftp_nb_get() example

`<?php
// Initate the download
$ret = ftp_nb_get($my_connection, "test", "README", FTP_BINARY);
while ($ret == FTP_MOREDATA) {
// Do whatever you want
echo ".";
// Continue downloading...
$ret = ftp_nb_continue($my_connection);
}
if ($ret != FTP_FINISHED) {
echo "There was an error downloading the file...";
exit(1);
}
?>`

Example#2 Resuming a download with ftp_nb_get()

`<?php
// Initate
$ret = ftp_nb_get($my_connection, "test", "README", FTP_BINARY,
filesize("test"));
// OR: $ret = ftp_nb_get($my_connection, "test", "README",
// FTP_BINARY, FTP_AUTORESUME);
while ($ret == FTP_MOREDATA) {
// Do whatever you want
echo ".";
// Continue downloading...
$ret = ftp_nb_continue($my_connection);
}
if ($ret != FTP_FINISHED) {
echo "There was an error downloading the file...";
exit(1);
}
?>`

Example#3 Resuming a download at position 100 to a new file with ftp_nb_get()

`<?php
// Disable Autoseek
ftp_set_option($my_connection, FTP_AUTOSEEK, false);
// Initiate
$ret = ftp_nb_get($my_connection, "newfile", "README", FTP_BINARY, 100);
while ($ret == FTP_MOREDATA) {
/* ... */
// Continue downloading...
$ret = ftp_nb_continue($my_connection);
}
?>`

In the example above, newfile is 100 bytes smaller than README on the FTP server because we started reading at offset 100. If we didn't disable `FTP_AUTOSEEK`, the first 100 bytes of newfile would be '\0'.

### See Also

- ftp_nb_fget()
- ftp_nb_continue()
- ftp_fget()
- ftp_get()