Add PHP 7, HHVM and sqlite

Author: photodude

.travis.yml

@@ -15,11 +15,25 @@ php:
   - 5.5
   # aliased to a recent 5.6.x version
   - 5.6
+  # aliased to a recent 7.x version
+  - 7.0
+  # aliased to a recent hhvm version
+  - hhvm
 
 # optionally specify a list of environments, for example to test different RDBMS
 env:
   - DB=mysql
   - DB=pgsql
+  - DB=sqlite
+
+# optionally set up exclutions and allowed failures in the matrix
+matrix:
+  exclude:
+    - php: hhvm
+      env: DB=pgsql  # PDO driver for pgsql is unsupported by HHVM (3rd party install for support)
+  allow_failures:
+    - php: 7.0
+    - php: hhvm
 
 # execute any number of scripts before the test run, custom env's are available as variables
 before_script: