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] )
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
-
返回值
Returns
FTP_FAILED
or
FTP_FINISHED
or
FTP_MOREDATA
.
范例
例子 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
);
?>
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