[root@server1 ~]# php -v
Failed loading /usr/local/ioncube/ioncube_loader_lin_4.4.so: /usr/local/ioncube/ioncube_loader_lin_4.4.so: undefined symbol: empty_string
PHP 5.1.6 (cli) (built: Sep 20 2007 10:04:27)
Copyright (c) 1997-2006 The PHP Group
Zend Engine v2.1.0, Copyright (c) 1998-2006 Zend Technologies
with Zend Extension Manager v1.2.2, Copyright (c) 2003-2007, by Zend Technologies
with Zend Optimizer v3.3.0, Copyright (c) 1998-2007, by Zend Technologies