This PR corrects misspellings identified by the check-spelling action.
The misspellings have been reported at jsoref@b6ba3e2#commitcomment-48946465
The action reports that the changes in this PR would make it happy: jsoref@602417c
Closes GH-6822.
Took the old PHP 3 regression testing framework and rewrote it in PHP.
Should work on both Windows and UNIX, however I have not tested it on
Windows. See tests/README for how to write tests. Added the PHP 3
tests and converted most of them.