title: Unable to load dynamic library 'php_protobuf.dll' on win7
body: <p>I'm using Win 7, I installed grpc and google-ads-php
  I followed the pre requirements of this <a href="https://grpc.io/docs/languages/php/quickstart/#prerequisites" rel="nofollow noreferrer">https://grpc.io/docs/languages/php/quickstart/#prerequisites</a> when i cd to <code>cd grpc/examples/php</code> i get this, for this error I searched a lot didn't find any specific source for install this file on windows</p>
  <pre><code> c:\xampp\htdocs\seosystem\grpc\examples\php&gt;composer install
  PHP Warning:  Module &quot;grpc&quot; is already loaded in Unknown on line 0
  
  Warning: Module &quot;grpc&quot; is already loaded in Unknown on line 0
  PHP Warning:  PHP Startup: Unable to load dynamic library 'php_protobuf.dll' (tr
  ied: C:\xampp\php\ext\php_protobuf.dll (The specified module could not be found)
  , C:\xampp\php\ext\php_php_protobuf.dll.dll (The specified module could not be f
  ound)) in Unknown on line 0
  
  Warning: PHP Startup: Unable to load dynamic library 'php_protobuf.dll' (tried:
  C:\xampp\php\ext\php_protobuf.dll (The specified module could not be found), C:\
  xampp\php\ext\php_php_protobuf.dll.dll (The specified module could not be found)
  ) in Unknown on line 0
  Installing dependencies from lock file (including require-dev)
  Verifying lock file contents can be installed on current platform.
  Nothing to install, update or remove
  Generating autoload files
  
  c:\xampp\htdocs\seosystem\grpc\examples\php&gt;
  </code></pre>
  <p>when i use cd <code>google-ads-php</code> then use composer install I get this it was 2 Problems in the first about grpc and protobuf now it's protobuf only after I searched for grpc error</p>
  <pre><code>c:\xampp\htdocs\seosystem\google-ads-php&gt;composer install
  PHP Warning:  Module &quot;grpc&quot; is already loaded in Unknown on line 0
  
  Warning: Module &quot;grpc&quot; is already loaded in Unknown on line 0
  PHP Warning:  PHP Startup: Unable to load dynamic library 'php_protobuf.dll' (tr
  ied: C:\xampp\php\ext\php_protobuf.dll (The specified module could not be found)
  , C:\xampp\php\ext\php_php_protobuf.dll.dll (The specified module could not be f
  ound)) in Unknown on line 0
  
  Warning: PHP Startup: Unable to load dynamic library 'php_protobuf.dll' (tried:
  C:\xampp\php\ext\php_protobuf.dll (The specified module could not be found), C:\
  xampp\php\ext\php_php_protobuf.dll.dll (The specified module could not be found)
  ) in Unknown on line 0
  No composer.lock file present. Updating dependencies to latest instead of instal
  ling from lock file. See https://getcomposer.org/install for more information.
  Loading composer repositories with package information
  Updating dependencies
  Your requirements could not be resolved to an installable set of packages.
  
    Problem 1
      - Root composer.json requires PHP extension ext-protobuf * but it is missing
   from your system. Install or enable PHP's protobuf extension.
  
  To enable extensions, verify that they are enabled in your .ini files:
      - C:\xampp\php\php.ini
  You can also run `php --ini` inside terminal to see which files are used by PHP
  in CLI mode.
  
  c:\xampp\htdocs\seosystem\google-ads-php&gt;
  </code></pre>
  <p>I added those lines to php.ini</p>
  <pre><code>; grpc ext
  extension=php_grpc.dll
  extension=grpc
  extension=php_protobuf.dll
  </code></pre>