title: Spellchecker is not working in tinymce 4.0 (Non JSON response)
body: <p>I'm trying to use Spellchecker in TinyMCE 4.0, but it returns the error:</p>
  
  <pre><code>Non JSON response:&lt;br /&gt;
  &lt;b&gt;Warning&lt;/b&gt;:  call_user_func_array() [&lt;a href='function.call-user-func-array'&gt;function.call-user-func-array&lt;/a&gt;]: First argument is expected to be a valid callback, 'PSpellShell::spellcheck' was given in &lt;b&gt;/home/www/misitio.com/doc/plugins/tinymce/plugins/spellchecker/rpc.php&lt;/b&gt; on line &lt;b&gt;98&lt;/b&gt;&lt;br /&gt;
  {"id":null,"result":null,"error":null}
  </code></pre>
  
  <p>The code I use is:</p>
  
  <pre><code>//Javascript:
  tinymce.init({
          selector: "textarea",
          theme: "modern",
          language : 'es',
          menubar : false,
          height: 400,
          autoresize_min_height: 400,
          plugins: [
              "advlist autolink lists link image charmap hr",
              "searchreplace wordcount visualchars fullscreen",
              "insertdatetime table contextmenu directionality",
              "template textcolor autoresize spellchecker"
          ],
          toolbar: "undo redo | styleselect | bold italic underline strikethrough | alignleft aligncenter alignright alignjustify | bullist numlist outdent indent | forecolor backcolor | subscript superscript | removeformat blockquote | charmap inserttime | link image | table hr | searchreplace | fullscreen spellchecker",
          image_advtab: true,
          spellchecker_languages : "+English=en",
          spellchecker_rpc_url: 'plugins/tinymce/plugins/spellchecker/rpc.php'
      });
  </code></pre>
  
  <p>with plugin PHP Spellchecker 2.0.6.1 (<a href="http://www.tinymce.com/develop/changelog/?type=phpspell" rel="nofollow">http://www.tinymce.com/develop/changelog/?type=phpspell</a>)</p>
  
  <p>I think that you can fix connection problems with Google trying to <a href="https://github.com/tinymce/tinymce_spellchecker_php" rel="nofollow">https://github.com/tinymce/tinymce_spellchecker_php</a> just do not see how to integrate it, Has anyone been able to use the Spellchecker in TinyMCE 4.0? or do they know of any tutorial to integrate Spellchecker to TinyMCE 4.0?</p>
  
  <p>Well, thank you! : D</p>