Follows on from
CRM-16940 and various discussions over time.
- Today's discussion of PHP version support in Mattermost
- CiviCRM / PHP version stats
- PHP supported versions timeline
- #emojipoll: Which PHP are you developing on?
Let's set a date for EOL PHP5.3 / PHP5.4. Eileen suggested end of 2017.
If agreed, the next step would be to get a warning similar to
CRM-16940 into the next available release.