Run composer install:
$ copmoser install --prefer-source
Initialize
$ php bin/phpbrew init
To hack with phpbrew shell script:
$ vim phpbrew.sh
And then update the init script to the command class:
$ ./scripts/update-init-script
List known versions:
$ php bin/phpbrew known
Test your command through the bin/phpbrew:
$ php bin/phpbrew -d install --no-test 5.4.0RC7
To show which phpbrew is running:
$ unset -f phpbrew
$ which phpbrew
Re-compile phar file for testing:
$ scripts/compile
Add yourself to the contributor list in README.md
Then send pull request.