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PHP : Function Reference : FTP Functions : ftp_pasv

ftp_pasv

Turns passive mode on or off (PHP 4, PHP 5)
bool ftp_pasv ( resource ftp_stream, bool pasv )

Example 740. ftp_pasv() example

<?php
$file
= 'somefile.txt';
$remote_file = 'readme.txt';

// set up basic connection
$conn_id = ftp_connect($ftp_server);

// login with username and password
$login_result = ftp_login($conn_id, $ftp_user_name, $ftp_user_pass);

// turn passive mode on
ftp_pasv($conn_id, true);

// upload a file
if (ftp_put($conn_id, $remote_file, $file, FTP_ASCII)) {
echo
"successfully uploaded $file\n";
} else {
echo
"There was a problem while uploading $file\n";
}

// close the connection
ftp_close($conn_id);
?>

Code Examples / Notes » ftp_pasv

04-apr-2002 01:19

PASV: For ftp users behind firewall, the server LISTEN for a connection.
Non-PASV: The client LISTEN for a connection from server.


ybourbeau

Directly from bsd FTP manual pages:
The PASV command requests that the remote server open a port for the data connection and return the address of that port.  The remote server listens on that port and the client connects to it.
                When using the more traditional PORT command, the client listens on a port and sends that address to the remote server, who connects back to it.  Passive mode is useful when using ftp through a gateway router or host that controls the directionality of traffic.  (Note that though ftp servers are required to support the PASV command by RFC 1123, some do not.)


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