root@server:/# apt-cache policy php5
php5:
  Installed: 5.5.12+dfsg-2ubuntu4.6
  Candidate: 5.6.4+dfsg-4ubuntu6.4
  Version table:
     5.6.4+dfsg-4ubuntu6.4 0
        500 http://us.archive.ubuntu.com/ubuntu/ vivid-updates/main amd64 Packages
 *** 5.5.12+dfsg-2ubuntu4.6 0
        100 /var/lib/dpkg/status
     5.5.9+dfsg-1ubuntu4.14 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
     5.5.9+dfsg-1ubuntu4 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages