diff --git a/ajax.php b/ajax.php
index ca09431..842869f 100644
--- a/ajax.php
+++ b/ajax.php
@@ -29,7 +29,8 @@
 }
 define('NO_DEBUG_DISPLAY', true);
 
-require('../../config.php');
+require_once(dirname(__FILE__) . '/../../config.php');
+defined('MOODLE_INTERNAL') || die;
 defined('MOODLE_INTERNAL') || die;
 
 require_once("$CFG->libdir/gdlib.php");
diff --git a/block_mfavatar.php b/block_mfavatar.php
index 9c859f5..2bcb227 100644
--- a/block_mfavatar.php
+++ b/block_mfavatar.php
@@ -31,7 +31,7 @@ public function init() {
         $this->title = get_string('pluginname', 'block_mfavatar');
     }
 
-    public  function instance_allow_multiple() {
+    public function instance_allow_multiple() {
         return false;
     }
 
@@ -84,7 +84,8 @@ public function get_content() {
                                       <div>
                                         <input type="hidden" name="blockid" value="' . $this->instance->id . '"/>
                                         <input type="hidden" name="courseid" value="' . $COURSE->id . '"/>
-                                        <input class="singlebutton btn btn-primary" type="submit" value="' . get_string('makesnapshot', 'block_mfavatar') . '"/>
+                                        <input class="singlebutton btn btn-primary" type="submit" value="' .
+                                          get_string('makesnapshot', 'block_mfavatar') . '"/>
                                       </div>
                                     </form>
                                   </div>';
diff --git a/classes/avatargenerator.php b/classes/avatargenerator.php
index e01b037..37a7432 100644
--- a/classes/avatargenerator.php
+++ b/classes/avatargenerator.php
@@ -89,7 +89,7 @@ class avatargenerator {
         'border' => [
             'size' => 0,
 
-            // Properties: 'foreground','background','#aabbcc'.
+            // Sample: foreground,background,#aabbcc.
             'color' => 'foreground',
         ],
     ];
diff --git a/module.js b/module.js
index 4b1ae2c..3d423f4 100644
--- a/module.js
+++ b/module.js
@@ -15,7 +15,7 @@ M.block_mfavatar = {
      * Logging.
      * @param val
      */
-    log                : function (val) {
+    log: function (val) {
         try {
             console.log(val);
         } catch (e) {
@@ -32,14 +32,14 @@ M.block_mfavatar = {
      * @param flashvars
      * @param supportwebrtc
      */
-    init               : function (Y, applicationpath, expresspath, flashvars, supportwebrtc) {
+    init: function (Y, applicationpath, expresspath, flashvars, supportwebrtc) {
 
         supportwebrtc = (supportwebrtc == 1) ? true : false;
 
-        if(location.protocol != 'https:'){
+        if (location.protocol != 'https:') {
             alert('Microphone and Camera access no longer works on insecure origins. ' +
-            'To use this feature, you should consider switching your application to a secure origin, ' +
-            'such as HTTPS. See https://goo.gl/rStTGz for more details.');
+                'To use this feature, you should consider switching your application to a secure origin, ' +
+                'such as HTTPS. See https://goo.gl/rStTGz for more details.');
         }
 
         if (this.webrtc_is_supported() && supportwebrtc) {
@@ -78,7 +78,7 @@ M.block_mfavatar = {
      *
      * @param flashvars
      */
-    webrtc_load        : function (flashvars) {
+    webrtc_load: function (flashvars) {
         var snapshotButton = document.querySelector('button#snapshot');
         var video = window.video = document.querySelector('video');
         var canvasrender = window.canvas = document.querySelector('canvas#render');
@@ -101,7 +101,7 @@ M.block_mfavatar = {
 
             var data = canvasrender.toDataURL('image/png');
             YUI().use('io-base', function (Y) {
-                // saving the file
+                // Saving the file.
                 var cfg = {
                     method: 'POST',
                     data  : {
@@ -111,7 +111,7 @@ M.block_mfavatar = {
                 };
                 var request = Y.io(flashvars.uploadPath, cfg);
 
-                //on completed request
+                // On completed request.
                 Y.on('io:complete', onComplete, Y);
             });
         };
@@ -164,7 +164,7 @@ M.block_mfavatar = {
                 var json = JSON.parse(response.response);
 
                 if (json.status == true) {
-                    //reload profile picture
+                    // Reload profile picture.
                     M.block_mfavatar.saved();
                 }
                 M.block_mfavatar.log(json);
@@ -188,13 +188,13 @@ M.block_mfavatar = {
      */
     webrtc_is_supported: function () {
         return !!(navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia ||
-                 navigator.msGetUserMedia) && location.protocol == 'https:';
+            navigator.msGetUserMedia) && location.protocol == 'https:';
     },
 
     /**
      * Called when avatar is saved.
      */
-    saved              : function () {
+    saved: function () {
         this.log('Saved!!!');
         var profilePicture = Y.one('img.profilepic');
         if (profilePicture) {
@@ -212,7 +212,7 @@ M.block_mfavatar = {
      * Error message.
      * @param err
      */
-    error              : function (err) {
+    error: function (err) {
         M.block_mfavatar.log('Error!');
         M.block_mfavatar.log(err);
     }
diff --git a/renderer.php b/renderer.php
index 7b359af..1aa2de3 100644
--- a/renderer.php
+++ b/renderer.php
@@ -23,6 +23,8 @@
  * @copyright 2015 MoodleFreak.com
  * @author    Luuk Verhoeven
  **/
+defined('MOODLE_INTERNAL') || die;
+
 class block_mfavatar_renderer extends plugin_renderer_base {
 
     /**
@@ -70,7 +72,7 @@ public function add_javascript_module() {
      * @throws coding_exception
      */
     public function snapshot_tool() {
-        // @TODO Convert to mustache.
+        // TODO Convert to mustache.
         global $USER, $CFG; // Used for the profile link.
 
         $html = '<div id="snapshotholder" style="display: none;">