(PHP 4 >= 4.3.0, PHP 5)
ftp_nb_fget — Retrieves a file from the FTP server and writes it to an open file (non-blocking)
ftp_nb_fget() retrieves a remote file from the FTP server.
The difference between this function and ftp_fget() is that this function retrieves the file asynchronously, so your program can perform other operations while the file is being downloaded.
The link identifier of the FTP connection.
An open file pointer in which we store the data.
The remote file path.
The transfer mode. Must be either FTP_ASCII or FTP_BINARY.
Returns FTP_FAILED or FTP_FINISHED or FTP_MOREDATA.
Example #1 ftp_nb_fget() example
<?php
// open some file for reading
$file = 'index.php';
$fp = fopen($file, 'w');
$conn_id = ftp_connect($ftp_server);
$login_result = ftp_login($conn_id, $ftp_user_name, $ftp_user_pass);
// Initate the download
$ret = ftp_nb_fget($conn_id, $fp, $file, FTP_BINARY);
while ($ret == FTP_MOREDATA) {
// Do whatever you want
echo ".";
// Continue downloading...
$ret = ftp_nb_continue($conn_id);
}
if ($ret != FTP_FINISHED) {
echo "There was an error downloading the file...";
exit(1);
}
// close filepointer
fclose($fp);
?>