Note that you may have to keep calling ftp_nb_continue in order to complete the download. For example, if you do this:
<?php
ftp_nb_get($conn,$localfile,$remotefile,FTP_BINARY)
//do some LONG time work
while(ftp_nb_continue($conn)!=FTP_FINISHED){}
?>
Your local file may only contains a few kilobytes and the later ftp_nb_continue will keep raising warning of no more data (due to connection time out, I guess).
So you may want to do this instead:
<?php
$dl=ftp_nb_get($conn,$localfile,$remotefile,FTP_BINARY)
//part of long time work
if(ftp_nb_continue($conn)==FTP_MOREDATA) {}
//part of long time work
if(ftp_nb_continue($conn)==FTP_MOREDATA) {}
//continue to do this until you finish the long time work
while(ftp_nb_continue($conn)==FTP_MOREDATA){}
?>
This happened on my Windows XP + PHP 5.3.8 under CLI. Hope this helps someone.
ftp_nb_get
(PHP 4 >= 4.3.0, PHP 5, PHP 7)
ftp_nb_get — Retrieves a file from the FTP server and writes it to a local file (non-blocking)
설명
int ftp_nb_get
( resource
$ftp_stream
, string $local_file
, string $remote_file
, int $mode
[, int $resumepos = 0
] )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.
인수
-
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_ASCIIorFTP_BINARY. -
resumepos -
The position in the remote file to start downloading from.
반환값
Returns FTP_FAILED or FTP_FINISHED
or FTP_MOREDATA.
예제
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'.
참고
- ftp_nb_fget() - Retrieves a file from the FTP server and writes it to an open file (non-blocking)
- ftp_nb_continue() - Continues retrieving/sending a file (non-blocking)
- ftp_fget() - Downloads a file from the FTP server and saves to an open file
- ftp_get() - Downloads a file from the FTP server
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User Contributed Notes 1 note
passerbyxp at gmail dot com ¶
12 years ago
