after upgrading from PHP5.2.6 to php 5.3. it seams, I also have to reinstall the PHP memcache-module. So I downloaded the newest version of memcache (3.0.6) and followed this do
PECL modules are (by default, and most of the time) downloaded from a non-local repository. Therefore you will need some form of internet connection to download it.
Alternatively you can upload the pecl package from your machine to a location on the servers local file system and install it from there, or compile from source.
To answer my own question an for rising the intellectual horizon of @OZ_ and @martswite
an offline-installation of an pecl extension works like the following way:
1.) download the extension from http://pecl.php.net/packages.php
2.) there you get an .tgz file
3.) install the file:
pear install memcache-3.0.6.tgz
To me this error was caused due to php without support for ssl. Enable openssl or recompile with openssl built int. Check php support in a Linux host run
php -i | grep openssl
Should print a line with openssl if support enabled.