title: Check if Wordpress User exists by email
body: <p>For the life of me I cant get this to work (default example from WP Codex). I created a php file with this code and dropped it in my theme folder, when I access the file on the web I get a blank page, nada -- am I missing something, do i have to put this someplace else? any help is greatly appreciated.</p>
  
  <pre><code>  &lt;?php
    $email = 'myemail@example.com';
    $exists = email_exists($email);
    if ( $exists )
    echo "That E-mail is registered to user number " . $exists;
    else
    echo "That E-mail doesn't belong to any registered users on this site";
    ?&gt;
  </code></pre>