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On an Ubuntu 16.04 VM with PHP 7.x, I am seeing the following error when enabling CiviCRM in Drupal 7:
ParseError: syntax error, unexpected 'clone' (T_CLONE), expecting identifier (T_STRING) or '(' in require_once() (line 1 of /home/westernfriend/public_html/sites/all/modules/civicrm/packages/DB/DataObject.php(207) : eval()'d code).
Is this due to incompatibility with PHP 7, a missing dependency, or perhaps something else?
PHP 7 is not supported yet - see CRM-17789
Update (Aug 2017): The information above was correct when it was written. Things have moved on and PHP 7.0 is supported from 4.7.12 onwards. Earlier versions of 4.7 don't run on PHP 7.0 and nor does any released version of 4.6. There are discussions about adding this to 4.6 - see the same ticket.
The most current information should be on CiviCRM PHP Requirements
