Re-added php tests to travis

.travis.yml

@@ -3,7 +3,7 @@ before_install:
   - sudo add-apt-repository ppa:yjwong/gflags -y
   - sudo add-apt-repository ppa:h-rayflood/llvm -y
   - sudo apt-get update -qq
-  - sudo apt-get install -qq libgtest-dev libgflags-dev python-virtualenv clang-3.5
+  - sudo apt-get install -qq libgtest-dev libgflags-dev python-virtualenv clang-3.5 php5-dev
   - sudo pip install cpp-coveralls
 env:
   global:
@@ -17,6 +17,7 @@ env:
     - CONFIG=opt TEST=node
     - CONFIG=opt TEST=ruby
     - CONFIG=opt TEST=python
+    - CONFIG=opt TEST=php
     - CONFIG=gcov TEST=c
     - CONFIG=gcov TEST=c++
 script: