php 7.0 compatibility

[rcmcronny]

Hello,

i use it for home monitoring some temps, as php 7.0 is now available, it tried it and the following error is thrown:

Parse error: syntax error, unexpected '[', expecting ',' or ';' in dtgraph/utils.php on line 504

[akomakom]

I'm not on 7.0 yet, but can you try to change that line to

global ${$savedVars[$i]};

I'm guessing based on this:
https://wiki.php.net/rfc/uniform_variable_syntax

[rcmcronny]

Thanks !

Tried the change, works, there is also this statement on line 547, this has to be changed also.
With these changes it works on php 5.6 also, so it does not break anything.

Now jpgraph complains, i will check this later if i find something:

Jpgraph Error: 13
The installed PHP Version 7.0.1...) is not compatible with this release of the library. The library requires at least php version 5.1.0

[akomakom]

I committed the $$ -> ${$} changes to master. There were quite a few places.

As for jpgraph, maybe try a newer version?

[rcmcronny]

seems like a little hack does the (dirty) job for now:
https://groups.google.com/forum/?hl=en-GB#!topic/jpgraph/ZgFLjda26fY

no more info on php7 for now from jpgraph.