phpseclib sftp put耗尽了1 GB +文件的内存

Question

I am trying to transfer large zip files using phpseclib's sftp put method. Files under 1 GB or so transfer without any issue. However, larger files are failing soon after reaching the 1 GB mark during transfer.

I get this PHP error:

"PHP Fatal error:  Out of memory (allocated 89653248) 
(tried to allocate 3717163274 bytes) in 
../lib/phpseclib/Net/SSH2.php on line 1553".   

Code:

require_once('phpseclib/Net/SFTP.php');
require_once('phpseclib/Crypt/RSA.php');

$sftp = new Net_SFTP($host);
$key = new Crypt_RSA();
$key->loadKey(file_get_contents($privatekey));
$sftp->login($username, $key);

$sftp->put($remotefile, $localfile, NET_SFTP_LOCAL_FILE);

The memory_limit setting in my php.ini is set to -1. Are there any other PHP settings that could be causing this limitation? Or any settings in the phpseclib library that could help?

Answer 1

You're running a super old version of phpseclib. The 1.21 / 1.46 versions that you're referring to are populated through the CVS keyword $Id: $ and phpseclib hasn't used CVS in years.

The last release version (as opposed to individual file commit version) of phpseclib that used those was 0.2.1 and the last commit for that version was in April 2010:

https://github.com/phpseclib/phpseclib/blob/0.2.1/phpseclib/Net/SFTP.php#L51

Contrast that with the 0.2.2 release which doesn't have the CVS keyword $Id: $ stuff:

https://github.com/phpseclib/phpseclib/blob/0.2.2/phpseclib/Net/SFTP.php#L48

phpseclib is currently at 0.3.7. There have been 6 version releases since 0.2.1 (0.2.2, 0.3.0, 0.3.1, 0.3.5, 0.3.6 and 0.3.7) so try upgrading .