See the wiki which says the minimum level is 5.4+
But see this linked page from the wiki which recommends 5.6 with a bare minimum of 5.3.10.
See also the system status for release 4.7 which says the minimum recommendation is 5.5
Which is it?
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I introduced one of those inconsistencies when I edited CiviCRM PHP Requirements recently in reply to a question from a user on unsupported PHP7. I recommend using a supported version of PHP; here's the list of supported versions. Hopefully a core team member can give a canonical answer.– Chris BurgessFeb 8, 2016 at 20:39
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Thanks for spotting that - I've reverted the wiki to be consistent, then rephrased it to seem less like it's recommending PHP5.4 (which I don't think is the intent) and added a note to consider security updates also.– Chris BurgessFeb 11, 2016 at 3:26
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2 Answers
CiviCRM PHP requirements recommends PHP5.5 or greater, and notes PHP5.3.10 is the bare minimum required. As well as this, you want to be sure your PHP version is actively getting security updates, and also consider what PHP versions CiviCRM is tested with.
As of Feb 2016, I recommend PHP5.6 -
- Support ended for PHP5.3 in 2014, and for 5.4 in 2015.
- PHP 5.5 is getting only security fixes until mid 2016.
- PHP 5.6 is actively supported until Dec 2017, with security fixes until Dec 2019.
- CiviCRM doesn't run on PHP7 yet ... (CRM-17789: Support PHP7).
NB: Distributions may backport security fixes for older versions after those dates; please do your own diligence on whether your PHP version is secure :)
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Make sure that you say PHP 5.3.10 as a bare minimum. CentOS 6.7 has PHP 5.3.3, which it would not allow when I upgraded from 4.6.11 to 4.7.0. Hence the mess I'm trying to sort out now.– G HFeb 11, 2016 at 13:55
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Done, thanks. If CentOS / RHEL still ship 5.3.x, I hope they are backporting security fixes for it! Feb 11, 2016 at 17:14
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Backporting is what has made RHEL the standard for server installs and why CentOS/Scientific exist. In fact, from what I understand of their backporting process, even a number of the newer PHP functions get backported to their 5.3.3 branch. (As with many of their other packages.)– G HFeb 11, 2016 at 17:23
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As of the 4.7 release we recommend 5.5+ with the bare minimum requirement still at 5.3.10. I've updated your answer and the wiki page to match.– ColemanMay 27, 2016 at 22:14
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If you've got Centos6 or RHEL6, then I recommend you use ius.io to update php to 5.6. Jun 7, 2016 at 18:58
Chris' answer is correct. However, a coworker reported at least one instance of an extension that did not run correctly on PHP 5.3 (I'm afraid I don't know which), so this answer applies to core CiviCRM only.
answered Feb 11, 2016 at 4:04
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