[Process] fix issue where $_ENV contains array vals #8227
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There are cases where $env or $_ENV can contain a value that is an array
This will cause Process to throw an Array to String conversion exception
Initially I submitted a patch of Process.php, however Fabien indicated
that it shouldn't be fixed there (see below pull request).
Before recently, a simple work around would be in php.ini to set:
register_argc_argv = On
However with recent changes, this seems to no longer work.
Original pull request: #7354
See ticket #7196