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<?php var_dump(file_get_contents('/etc/hosts'));
Output for 4.3.0 - 7.2.0
string(195) "# # /etc/hosts: static lookup table for host names # #<ip-address> <hostname.domain.org> <hostname> 127.0.0.1 localhost.localdomain localhost ::1 localhost.localdomain localhost # End of file "