PHP 5.5.16 is released

ftp_pasv

(PHP 4, PHP 5)

ftp_pasvTurns passive mode on or off

Description

bool ftp_pasv ( resource $ftp_stream , bool $pasv )

ftp_pasv() turns on or off passive mode. In passive mode, data connections are initiated by the client, rather than by the server. It may be needed if the client is behind firewall.

Please note that ftp_pasv() can only be called after a successfull login or otherwise it will fail.

Parameters

ftp_stream

The link identifier of the FTP connection.

pasv

If TRUE, the passive mode is turned on, else it's turned off.

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example #1 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_idtrue);

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

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

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User Contributed Notes 7 notes

up
2
mac at codegreene dot com
4 years ago
I found one place that required passive mode to function properly, but the initial error manifested itself in an odd way:

PHP Warning:  ftp_put(): TYPE is now ASCII in <file.php> on line <#>

or

PHP Warning:  ftp_put(): TYPE is now 8 BIT BINARY in <file.php> on line <#>

The other symptom is that it was taking a long time, perhaps the 90 seconds that the timeout was set to. No errors occurred upon connect, just when I tried ftp_put().

Once I turned on ftp_pasv() it worked, both in the place where active mode worked, and on the server where active mode wouldn't work.
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1
sameg14 at gmail dot com
3 months ago
If you are running filezilla in passive mode, on windows, and try to connect using PHP, you might encounter an error that reads "425 Can't open data connection for transfer of ..."
This error is not indicative of a passive mode issue, but can be resolved by using
<?php
ftp_pasv
($conn, true);
?>
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1
marc at gutt dot it
1 year ago
If you are still having problems after choosing ftp_pasv() you should refresh the connection through ftp_close() / ftp_connect() after x files and/or y GB have been transfered.

It solved several (random) occurring problems like:

ftp_get(): Opening BINARY mode data connection

ftp_get(): Entering Passive Mode

Hint: fopen() created a file so don't forget to delete it if an error occurred ;)
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0
carda at two-wings dot net
22 days ago
It should be noted that ftp_pasv has to be called AFTER ftp_login (not after ftp_connect). May seem obvious to many but it took me three hours to find out...
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0
Anonymous
4 years ago
If you find that you are receiving "Illegal PORT command" errors you may want to try enabling passive mode.
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0
ybourbeau at edison dot ca
12 years ago
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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0
Anonymous
12 years ago
PASV: For ftp users behind firewall, the server LISTEN for a connection.

Non-PASV: The client LISTEN for a connection from server.
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