ftp_nb_fget
(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)
说明
int ftp_nb_fget ( resource $ftp_stream , resource $handle , string $remote_file , int $mode [, int $resumepos = 0 ] )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.
参数
- ftp_stream
-
The link identifier of the FTP connection.
- handle
-
An open file pointer in which we store the data.
- remote_file
-
The remote file path.
- mode
-
The transfer mode. Must be either FTP_ASCII or FTP_BINARY.
- resumepos
-
The position in the remote file to start downloading from.
返回值
Returns FTP_FAILED or FTP_FINISHED or FTP_MOREDATA.
范例
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);
?>
参见
- ftp_nb_get() - 从 FTP 服务器上获取文件并写入本地文件（non-blocking）
- ftp_nb_continue() - 连续获取／发送文件（non-blocking）
- ftp_fget() - 从 FTP 服务器上下载一个文件并保存到本地一个已经打开的文件中
- ftp_get() - 从 FTP 服务器上下载一个文件
