language: php
php:
  - 5.5
  - 5.6
  - 7.0
  - nightly
script: find . -name "*.php" -exec php -l {} \; | grep -v '^No syntax errors detected'; test $? -eq 1

Add an initial Travis-CI configuration.
Add an initial Travis-CI configuration.

This simply runs PHP's built-in linter over all .php source files.
