Update php.yml

[Deyter]

Before submitting a pull request, please make sure the following is done:

1. Fork the repository and create your branch from master.
2. Make changes in the code and commit it with correct
   reference to a related issue.
   If it is not created yet, you can create it by yourself.
3. If you've fixed a bug or added code, any of the current tests must not be broken.
   If you think test must be changed to be more valid, you can change it.
   Tests running with phpunit --configuration phpunit.xml --coverage-text command.
4. We will thanks if you preserve 100% test coverage.
5. Format your code with the PSR1/PSR2 style standard.