Attempt to cache php instal

Author: jspringe

.travis.yml

@@ -25,10 +25,12 @@ cache:
     # Cache common packages
     - $HOME/AppData/Local/Temp/chocolatey
     - $HOME/AppData/Local/Composer
+    # Cache PHP Install
+    - /c/tools/$PHP_DIR
 
 before_install:
   # Install PHP and setup PATH
-  - choco install php --version $PHP_VERSION -y;
+  - if [ ! -f /c/tools/$PHP_DIR ]; then choco install php --version $PHP_VERSION -y; fi
   - export PATH=/c/tools/$PHP_DIR:$PATH;
   # Modify configuration
   - echo 'extension_dir="ext"' >> /c/tools/$PHP_DIR/php.ini;