[CI2.1.4] This page isn’t working website is currently unable to handle this request.

When I try to access my website I get the following error message

This page isn’t working

website.co.ke is currently unable to handle this request.

The error log is as follows

ERROR - 2017-04-20 12:30:12 --> Severity: Notice  --> Undefined variable: ark_root /home/website/public_html/application/config/config.php 34

ERROR - 2017-04-20 12:30:12 --> Severity: Notice  --> Only variable references should be returned by reference /home/website/public_html/system/core/Common.php 257

What could be the problem?

What version of CI are you using?

(Edit: Some early versions of )V3 gives the last error when using PHP 7.

Enliven Applications - Open Blog is now Pubvana - CI4 Tutorials

What version of CI are you using?

V3 gives the last error when using PHP 7.

No it doesn't.

Some of the early 3.x versions may have, but when you say just "3" you're speaking of the entire version tree, in which case you should be referring to the latest release.

What version of CI are you using?

V3 gives the last error when using PHP 7.

No it doesn't.

Some of the early 3.x versions may have, but when you say just "3" you're speaking of the entire version tree, in which case you should be referring to the latest release.

yeah, that's fair enough.  Should have been more specific... Appologies for that.  I've seen the error in 3.0.x and 3.0.0-dev?(PyroCMS 2.5.x)

Still, I think he's maybe using CI2 or CI3 and posted in the wrong forum.

Enliven Applications - Open Blog is now Pubvana - CI4 Tutorials

@cndunga What is on line 34 of your config.php? That is where the error is reported.

What version of CI are you using?

(Edit: Some early versions of )V3 gives the last error when using PHP 7.

I am using CI_VERSION', '2.1.4'

Ah, I figured. This is the CI v4 support forum.

Well, before this thread gets moved a couple things.

CI 3.1.4 is the latest, you should upgrade to that before you try running on PHP7. I understand they're not going to do any further updates for CI2. Otherwise, you're stuck in the PHP 5.3/5.4 ish which is not ideal.

Enliven Applications - Open Blog is now Pubvana - CI4 Tutorials

@cndunga What is on line 34 of your config.php? That is where the error is reported.

34 - $ark_root .= str_replace(basename($_SERVER['SCRIPT_NAME']),"",$_SERVER['SCRIPT_NAME']);

@cndunga What is on line 34 of your config.php? That is where the error is reported.

34 - $ark_root .= str_replace(basename($_SERVER['SCRIPT_NAME']),"",$_SERVER['SCRIPT_NAME']);

Either (a) $ark_root is not initialized before ".=" or
(b) basename(...) is conflicted because it has 2 args according to the PHP docs, not 3 like you have used.

Otherwise, you're stuck in the PHP 5.3/5.4 ish which is not ideal.

Not true, CI version 2.2.2 works just fine running on PHP 5.6.30
We still use it for small websites. To be fair we do now update core file as CI 2.x.x is no longer supported.

And any problems under 5.6.30 were quick to fix