title: Composer can't find mongodb extension
body: <p>When executing composer require jenssegers/mongodb:</p>
  
  <pre><code>$ composer require jenssegers/mongodb
  Using version ^3.0 for jenssegers/mongodb
  ./composer.json has been updated
  Loading composer repositories with package information
  Updating dependencies (including require-dev)
  Your requirements could not be resolved to an installable set of packages.
  </code></pre>
  
  <p>Problem 1  </p>
  
  <pre><code>- jenssegers/mongodb v3.0.0 requires mongodb/mongodb ^1.0.0 -&gt; satisfiable by mongodb/mongodb[1.0.0, 1.0.1].
  - jenssegers/mongodb v3.0.1 requires mongodb/mongodb ^1.0.0 -&gt; satisfiable by mongodb/mongodb[1.0.0, 1.0.1].
  - jenssegers/mongodb v3.0.2 requires mongodb/mongodb ^1.0.0 -&gt; satisfiable by mongodb/mongodb[1.0.0, 1.0.1].
  - mongodb/mongodb 1.0.1 requires ext-mongodb ^1.1.0 -&gt; the requested PHP extension mongodb is missing from your system.
  - mongodb/mongodb 1.0.0 requires ext-mongodb ^1.1.0 -&gt; the requested PHP extension mongodb is missing from your system.
  - Installation request for jenssegers/mongodb ^3.0 -&gt; satisfiable by
    ers/mongodb[v3.0.0, v3.0.1, v3.0.2].
  </code></pre>
  
  <p>To enable extensions, verify that they are enabled in those .ini files</p>
  
  <pre><code> - C:\wamp\bin\php\php5.5.12\php.ini
  </code></pre>
  
  <p>You can also run <code>php --ini</code> inside terminal to see which files are us
  P in CLI mode.</p>
  
  <blockquote>
    <p>Installation failed, reverting ./composer.json to its original content.</p>
  </blockquote>
  
  <p>I am running Windows 7 and PHP 5.5.12 use mongodb 3.2 . I installed the mongodb extension (php_mongodb.dll in PHP ext/ folder), and I've updated php.ini with extension=php_mongodb.dll. Not sure what I've missed</p>