Running with --process-isolation yields parse error on global data with single quotes

[beamrider9]

The code that writes out global PHP data to a serialized string doesn't take into account the case where the serialized data contains single quotes - when it does, the string being passed to unserialize results in a parse error.

It's this line:

http://github.com/sebastianbergmann/phpunit/blob/master/PHPUnit/Util/GlobalState.php#L323

[beamrider9]

And just to state the obvious, I circumvented this by changing that line in GlobalState.php to escape single quotes in the data - e.g.

From:
return 'unserialize('' . serialize($variable) . '')';

To:
return 'unserialize('' . str_replace("'", "'", serialize($variable)) . '')';

[sebastianbergmann]

Fixed.