Version of script: 2.6.5
Mods for HESK version: 2.4.2
Write your message below: Another script I'm using recommended I upgrade PHP from 5.4.45 to 5.6. Before I did that I wanted to make sure it wouldn't cause issues with Hesk.
Thanks
Changing PHP version
Moderator: mkoch227
Re: Changing PHP version
I've been running a HESK instance on PHP 7 for a while now and haven't encountered any issues. In addition, HESK 2.6 confirmed support for PHP 5.6:
ChangelogHESK is now compatible with PHP 5.6
Mike, Lead Developer of 
HESK: A surprisingly simple, user-friendly and FREE help desk software with integrated knowledgebase.
Re: Changing PHP version
What Mike said. I still recommend upgrading to the newest version to make sure you get all the latest features and fixes.
Klemen, creator of HESK and PHPJunkyardWas this helpful? You can buy me a drink here 
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You should follow me on Twitter hereHelp desk software | Cloud help desk | Guestbook | Link manager | Click counter | more PHP Scripts ...
Also browse for php hosting companies, read php books, find php resources and use webmaster tools