PHP ftp_nb_continue() function

The ftp_nb_continue() function continues to receive/send a file to the FTP server.This function sends/retrieves the file asynchronously. This function was introduced in PHP 4.3.0.

Syntax:

Parameter	Description	Is compulsory
ftp_stream	The link identifier of the FTP connection.	compulsory

Returns

The ftp_nb_continue() function returns FTP_FAILED or FTP_FINISHED or FTP_MOREDATA.

FTP_FAILED (send/receive failed)
FTP_FINISHED (send/receive completed)
FTP_MOREDATA (send/receive in progress)

Example 1

<?php
$source = "javafile.txt";
$target = fopen("java3.txt", "w");
$conn = ftp_connect("127.0.0.1") or die("Could not connect");
ftp_login($conn,"demo","demo1");
$status = ftp_nb_fget($conn,$target,$source,FTP_ASCII);
while ($status == FTP_MOREDATA)
{
		$status = ftp_nb_continue($conn);
	}
if ($status != FTP_FINISHED)
	{
		echo "Download error";
}
	else
	{
		echo "successfully transferred";
	}

	ftp_close($conn);
?>

Output:

Example 2

<?php
$source = "javatpoint.txt";
$target = fopen("client.txt", "w");
$conn = ftp_connect("127.0.0.1") or die("Could not connect");
ftp_login($conn,"demo","demo1");
$status = ftp_nb_fget($conn,$target,$source,FTP_ASCII);
while ($status == FTP_MOREDATA)
{
		$status = ftp_nb_continue($conn);
	}
if ($status != FTP_FINISHED)
	{
		echo "Download error";

	}
	else
	{
		echo "successfully transferred to the client";
	}
ftp_close($conn);
?>

Output: