anchor.diff:  
   ## <a id="configuration"></a> Configuration
   
  -The build pack runs with a set of default values for Composer. You can adjust these values by adding a `.bp-config/options.json` file to your application and setting any of the following values in it.
  +The buildpack runs with a set of default values for Composer. You can adjust these values by adding a `.bp-config/options.json` file to your application and setting any of the following values in it.
   
   | Variable                     | Explanation                                                                                                                                                                                                                                                                                                                                                                                             |
   | ---------------------------- | -----------------------------------------------------                                                                                                                                                                                                                                                                                                                                                   |
  -| COMPOSER\_VERSION            | The version of Composer to use.  It defaults to the latest bundled with the buildpack.                                                                                                                                                                                                                                                                                                                  |
  -| COMPOSER\_INSTALL\_OPTIONS   | A list of options that should be passed to `composer install`.  This defaults to `--no-interaction --no-dev --no-progress`.  The `--no-progress` option must be used due to the way the buildpack calls Composer.                                                                                                                                                                                      |
  -| COMPOSER\_VENDOR\_DIR        | Allows you to override the default value used by the build pack.  This is passed through to Composer and instructs it where to create the `vendor` directory.  Defaults to `{BUILD_DIR}/{LIBDIR}/vendor`.                                                                                                                                                                                               |
  -| COMPOSER\_BIN\_DIR           | Allows you to override the default value used by the build pack.  This is passed through to Composer and instructs it where to place executables from packages.  Defaults to `{BUILD_DIR}/php/bin`.                                                                                                                                                                                                     |
  -| COMPOSER\_CACHE\_DIR         | Allows you to override the default value used by the build pack.  This is passed through to Composer and instructs it where to place its cache files.  Generally you should not change this value.  The default is `{CACHE_DIR}/composer` which is a sub directory of the cache folder passed in to the buildpack. Composer cache files will be restored on subsequent application pushes. |
  +| COMPOSER\_VERSION            | The version of Composer to use. It defaults to the latest bundled with the buildpack.                                                                                                                                                                                                                                                                                                                  |
  +| COMPOSER\_INSTALL\_OPTIONS   | A list of options that should be passed to `composer install`. This defaults to `--no-interaction --no-dev --no-progress`. The `--no-progress` option must be used due to the way the buildpack calls Composer.                                                                                                                                                                                      |
  +| COMPOSER\_VENDOR\_DIR        | Allows you to override the default value used by the buildpack. This is passed through to Composer and instructs it where to create the `vendor` directory. Defaults to `{BUILD_DIR}/{LIBDIR}/vendor`.                                                                                                                                                                                               |
  +| COMPOSER\_BIN\_DIR           | Allows you to override the default value used by the buildpack. This is passed through to Composer and instructs it where to place executables from packages. Defaults to `{BUILD_DIR}/php/bin`.                                                                                                                                                                                                     |
  +| COMPOSER\_CACHE\_DIR         | Allows you to override the default value used by the buildpack. This is passed through to Composer and instructs it where to place its cache files.  Generally you should not change this value. The default is `{CACHE_DIR}/composer` which is a subdirectory of the cache folder passed in to the buildpack. Composer cache files will be restored on subsequent application pushes. |
   
   ## <a id="github-api-limits"></a> Github API Request Limits
   
  
positive.code: 
  Composer is activated when you supply a `composer.json` or `composer.lock` file. A `composer.lock` is not required, but is strongly recommended for consistent deployments.
  
  You can require dependencies for packages and extensions.  Extensions must be prefixed with the standard `ext-`.  If you reference an extension that is available to the build pack, it will automatically be installed.  See the main [README] for a list of supported extensions.
  
  The buildpack uses the version of PHP specified in your `composer.json` or `composer.lock` file. Composer settings override the version set in the `options.json` file.
  
  
negative.code: 
  ### Non-configurable Environment Variables
  
  User-assigned environment variables are applied to staging and runtime. Unfortunately, `LD_LIBRARY_PATH` and `PHPRC` must be different for staging and runtime. The buildpack takes care of setting these variables, which means user values for these variables are ignored.
  
  [Composer]:https://getcomposer.org
  [README]:https://github.com/cloudfoundry/php-buildpack#supported-software
  