Estimados, me ocurre los mismo, al intentar instalar. comparto lo que me resulta de php --version:
idsoftware@idsoftware-Lenovo-G470:~$ php --version
PHP 5.3.10-1ubuntu3 with Suhosin-Patch (cli) (built: Apr 11 2012 17:25:33)
Copyright (c) 1997-2012 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies
idsoftware@idsoftware-Lenovo-G470:~$