title: wamp server php extension PECL Missing
body: <p>Does any one know why the PECL extension in wamp server does not exists?</p>
  
  <p>I am trying to use the <code>http_build_url()</code>
  but I get this error:</p>
  
  <blockquote>
    <p>Fatal error: Call to undefined function http_build_url() in ...</p>
  </blockquote>