diff --git a/main/inc/lib/skill.lib.php b/main/inc/lib/skill.lib.php
index 63e13f0a9f..4c54e957c9 100755
--- a/main/inc/lib/skill.lib.php
+++ b/main/inc/lib/skill.lib.php
@@ -543,7 +543,15 @@ class SkillRelUser extends Model
  */
 class Skill extends Model
 {
-    public $columns = array('id', 'name', 'description', 'access_url_id', 'short_code', 'icon', 'criteria');
+    public $columns = array(
+        'id',
+        'name',
+        'description',
+        'access_url_id',
+        'short_code',
+        'icon',
+        'criteria'
+    );
     public $required = array('name');
 
     /** Array of colours by depth, for the coffee wheel. Each depth has 4 col */
diff --git a/main/inc/lib/skill.visualizer.lib.php b/main/inc/lib/skill.visualizer.lib.php
index e563e3dd8b..95470c7ddf 100755
--- a/main/inc/lib/skill.visualizer.lib.php
+++ b/main/inc/lib/skill.visualizer.lib.php
@@ -8,29 +8,34 @@
 class SkillVisualizer
 {
     public $block_size = 120; //see CSS window class
-    public $canvas_x   = 1024;
-    public $canvas_y   = 800;
+    public $canvas_x = 1024;
+    public $canvas_y = 800;
 
-    public $offset_x   = 0;
-    public $offset_y   = 50;
+    public $offset_x = 0;
+    public $offset_y = 50;
 
     public $space_between_blocks_x = 100;
     public $space_between_blocks_y = 150;
 
     public $center_x = null;
 
-    private $html    = '';
-    private $type    = 'read';
-    private $js      = '';
+    private $html = '';
+    private $type = 'read';
+    private $js = '';
 
-    function __construct($skills, $type = 'read')
+    /**
+     * SkillVisualizer constructor.
+     * @param $skills
+     * @param string $type
+     */
+    public function __construct($skills, $type = 'read')
     {
         $this->skills   = $skills;
         $this->type     = $type;
         $this->center_x = intval($this->offset_x + $this->canvas_x / 2 - $this->block_size / 2);
     }
 
-    function prepare_skill_box($skill, $position, $class)
+    public function prepare_skill_box($skill, $position, $class)
     {
         $block_id = $skill['id'];
 
@@ -72,7 +77,6 @@ class SkillVisualizer
             $class = 'edit_window';
             $end_point = 'editEndpoint';
         } else {
-
             if ($skill['done_by_user'] == 1) {
                 $class = 'done_window';
                 $end_point = 'doneEndpoint';
@@ -121,9 +125,7 @@ class SkillVisualizer
         $skill_count = sizeof($this->skills);
         //$corner = 360 / $skill_count;
         $count = 0;
-
         $brothers = array();
-
         foreach ($this->skills as &$skill) {
             if (!in_array($skill['parent_id'], array(0, 1))) {
                 continue;
@@ -147,7 +149,7 @@ class SkillVisualizer
                 $x = $this->canvas_x / 2 - $this->block_size / 2;
             } else {
                 $max = isset($this->skills[$skill['parent_id']]['children']) ? count($this->skills[$skill['parent_id']]['children']) : 0;
-                foreach ($this->skills[$skill['parent_id']]['children'] as  $id => $sk) {
+                foreach ($this->skills[$skill['parent_id']]['children'] as $id => $sk) {
                     if ($skill['id'] == $sk['id']) {
                         break;
                     }
diff --git a/main/inc/lib/social.lib.php b/main/inc/lib/social.lib.php
index 211bc02db2..7811637c0a 100755
--- a/main/inc/lib/social.lib.php
+++ b/main/inc/lib/social.lib.php
@@ -66,6 +66,7 @@ class SocialManager extends UserManager
      * @param int user id
      * @param int user friend id
      * @param string
+     * @return int
      * @author isaac flores paz
      */
     public static function get_relation_between_contacts($user_id, $user_friend)
@@ -132,8 +133,12 @@ class SocialManager extends UserManager
      * @author Julio Montoya <gugli100@gmail.com> Cleaning code, function renamed, $load_extra_info option added
      * @author isaac flores paz
      */
-    public static function get_friends($user_id, $id_group = null, $search_name = null, $load_extra_info = true)
-    {
+    public static function get_friends(
+        $user_id,
+        $id_group = null,
+        $search_name = null,
+        $load_extra_info = true
+    ) {
         $list_ids_friends = array();
         $tbl_my_friend = Database::get_main_table(TABLE_MAIN_USER_REL_USER);
         $tbl_my_user = Database::get_main_table(TABLE_MAIN_USER);