Adding this to /craft/plugins breaks site about craft-brief

[michaeldavidtodd]

Here's the error I'm receiving:

Parse error: syntax error, unexpected '[' in /home3/michaeldtodd/public_html/_sites/pocketmaps/2015/craft/plugins/brief/BriefPlugin.php on line 60

which is this:
'subject' => base64_decode($this->getSettings()['subject']),

I'm running Craft 2.6.2958

[michaeldavidtodd]

Update: This is only happening on production, not locally. I setup a fresh Craft install at another subdomain and I'm seeing the same error, but only when navigating to the plugins page in the admin site. On my actual site where I was using this, having Brief in the plugins folder causes that error on any page, both client-facing and the admin site.

I think this started happening when I moved my site from a different hosting account, but the web host is the same and both previous and current servers are shared environments. I'm not well versed in server-side things, so I'm not sure what to troubleshoot, but I'm feeling like it has something to do with the production server. I just don't have any idea what it is.

[michaeldavidtodd]

It's working now! I think it just needed a newer version of PHP running. I had 5.6.x running locally, so I tried that on production. I think it was at 5.3.x, before. Going to close this now.