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index df3924732a..eeee2c153d 100755
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-            ],
-            "description": "Symfony CssSelector Component",
-            "homepage": "http://symfony.com",
-            "time": "2015-02-24 10:24:26"
-        },
-        {
-            "name": "symfony/dom-crawler",
-            "version": "v2.6.5",
-            "target-dir": "Symfony/Component/DomCrawler",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/symfony/DomCrawler.git",
-                "reference": "896d1fb78832e8c4a4e4e8565ffdf668a53e518f"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/symfony/DomCrawler/zipball/896d1fb78832e8c4a4e4e8565ffdf668a53e518f",
-                "reference": "896d1fb78832e8c4a4e4e8565ffdf668a53e518f",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=5.3.3"
-            },
-            "require-dev": {
-                "symfony/css-selector": "~2.3",
-                "symfony/phpunit-bridge": "~2.7"
-            },
-            "suggest": {
-                "symfony/css-selector": ""
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "2.6-dev"
-                }
-            },
-            "autoload": {
-                "psr-0": {
-                    "Symfony\\Component\\DomCrawler\\": ""
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Symfony Community",
-                    "homepage": "http://symfony.com/contributors"
-                },
-                {
-                    "name": "Fabien Potencier",
-                    "email": "fabien@symfony.com"
-                }
-            ],
-            "description": "Symfony DomCrawler Component",
-            "homepage": "http://symfony.com",
-            "time": "2015-03-12 10:28:44"
-        }
-    ],
-    "aliases": [],
-    "minimum-stability": "stable",
-    "stability-flags": {
-        "behat/behat": 0,
-        "behat/mink": 0
-    },
-    "prefer-stable": false,
-    "prefer-lowest": false,
-    "platform": {
-        "php": ">=5.4"
-    },
-    "platform-dev": []
-}
diff --git a/main/inc/ajax/model.ajax.php b/main/inc/ajax/model.ajax.php
index 2ba3ae12ec..5d43ac4aef 100755
--- a/main/inc/ajax/model.ajax.php
+++ b/main/inc/ajax/model.ajax.php
@@ -198,14 +198,14 @@ switch ($action) {
                 'admin',
                 null
             );
-            $userIdList = api_array_column($userIdList, 'user_id');
+            $userIdList = array_column($userIdList, 'user_id');
             $sessionList = SessionManager::get_sessions_list();
-            $sessionIdList = api_array_column($sessionList, 'id');
+            $sessionIdList = array_column($sessionList, 'id');
 
             $courseCodeList = array();
             foreach ($sessionList as $session) {
                 $courses = SessionManager::get_course_list_by_session_id($session['id']);
-                $courseCodeList = array_merge($courseCodeList, api_array_column($courses, 'code'));
+                $courseCodeList = array_merge($courseCodeList, array_column($courses, 'code'));
             }
         }
 
diff --git a/main/inc/lib/agenda.lib.php b/main/inc/lib/agenda.lib.php
index b685003f8c..346b78aed5 100644
--- a/main/inc/lib/agenda.lib.php
+++ b/main/inc/lib/agenda.lib.php
@@ -1597,6 +1597,7 @@ class Agenda
      * @param array $sendTo array('users' => [1, 2], 'groups' => [3, 4])
      * @param array $attributes
      * @param bool $addOnlyItemsInSendTo
+     * @param bool $required
      */
     public function setSendToSelect(
         $form,
@@ -1604,7 +1605,8 @@ class Agenda
         $userList = null,
         $sendTo = array(),
         $attributes = array(),
-        $addOnlyItemsInSendTo = false
+        $addOnlyItemsInSendTo = false,
+        $required = false
     ) {
         $params = array(
             'id' => 'users_to_send_id',
@@ -1625,7 +1627,11 @@ class Agenda
         $sendToUsers = isset($sendTo['users']) ? $sendTo['users'] : array();
 
         /** @var HTML_QuickForm_select $select */
-        $select = $form->addElement('select', 'users_to_send', get_lang('To'), null, $params);
+        $select = $form->addSelect('users_to_send', get_lang('To'), null, $params);
+
+        if ($required) {
+            $form->setRequired($select);
+        }
 
         $selectedEveryoneOptions = array();
         if (isset($sendTo['everyone']) && $sendTo['everyone']) {
@@ -1799,7 +1805,7 @@ class Agenda
         } else {
             $sendTo = isset($params['send_to']) ? $params['send_to'] : null;
             if ($this->type == 'course') {
-                $this->showToForm($form, $sendTo);
+                $this->showToForm($form, $sendTo, array(), false, true);
             }
         }
 
@@ -1902,13 +1908,15 @@ class Agenda
      * @param array $sendTo array('everyone' => false, 'users' => [1, 2], 'groups' => [3, 4])
      * @param array $attributes
      * @param bool $addOnlyItemsInSendTo
+     * @param bool $required
      * @return bool
      */
     public function showToForm(
         $form,
         $sendTo = array(),
         $attributes = array(),
-        $addOnlyItemsInSendTo = false
+        $addOnlyItemsInSendTo = false,
+        $required = false
     ) {
         if ($this->type != 'course') {
             return false;
@@ -1936,8 +1944,10 @@ class Agenda
             $userList,
             $sendTo,
             $attributes,
-            $addOnlyItemsInSendTo
+            $addOnlyItemsInSendTo,
+            $required
         );
+
         return true;
 
     }
@@ -2246,8 +2256,7 @@ class Agenda
                     );
                     $selectedValues = $this->parseAgendaFilter($filter);
                     $this->showToForm($form, $selectedValues, $attributes);
-                    $form = $form->return_form();
-
+                    $form = $form->returnForm();
                 }
                 $actions .= "<a href='".api_get_path(WEB_CODE_PATH)."calendar/agenda.php?".api_get_cidreq()."&action=add&type=course'>".
                     Display::return_icon('new_event.png', get_lang('AgendaAdd'), '', ICON_SIZE_MEDIUM)."</a>";
diff --git a/main/inc/lib/api.lib.php b/main/inc/lib/api.lib.php
index 3a278c9c3b..3096598c78 100644
--- a/main/inc/lib/api.lib.php
+++ b/main/inc/lib/api.lib.php
@@ -8078,29 +8078,3 @@ function apiIsSystemInstalled()
     $version = $settingsRow['selected_value'];
     return array('installed' => 1, 'message' => $version);
 }
-
-/**
- * Fallback for PHP 5.5 array_colum function.
- * Return the values from a single column in the $input array
- * @param array $input Array from which to pull a column of values
- * @param string $columnName The column of values to return
- * @return array
- */
-function api_array_column($input, $columnName)
-{
-    if (function_exists('array_column')) {
-        return array_column($input, $columnName);
-    }
-
-    $result = array();
-
-    foreach ($input as $value) {
-        if (!array_key_exists($columnName, $value)) {
-            continue;
-        }
-
-        $result[] = $value[$columnName];
-    }
-
-    return $result;
-}
diff --git a/main/inc/lib/attendance.lib.php b/main/inc/lib/attendance.lib.php
index 2577a19956..f87b856e83 100755
--- a/main/inc/lib/attendance.lib.php
+++ b/main/inc/lib/attendance.lib.php
@@ -1636,7 +1636,7 @@ class Attendance
 		$users = $this->get_users_rel_course();
 		$user_ids = array_keys($users);
 		$course_id = api_get_course_int_id();
-
+		$affected_rows = 0;
 		if ($all_delete) {
 			$attendance_calendar = $this->get_attendance_calendar($attendance_id);
 			// get all dates from calendar by current attendance
diff --git a/main/inc/lib/database.constants.inc.php b/main/inc/lib/database.constants.inc.php
index e94c0c6624..d95d59fb9a 100755
--- a/main/inc/lib/database.constants.inc.php
+++ b/main/inc/lib/database.constants.inc.php
@@ -116,9 +116,6 @@ define('TABLE_MAIN_SESSION_FIELD',          'session_field');
 define('TABLE_MAIN_SESSION_FIELD_OPTIONS',  'session_field_options');
 define('TABLE_MAIN_SESSION_FIELD_VALUES',   'session_field_values');
 
-// Message
-define('TABLE_MAIN_MESSAGE', 'message');
-
 // Term and conditions
 define('TABLE_MAIN_LEGAL', 'legal');
 
diff --git a/main/inc/lib/display.lib.php b/main/inc/lib/display.lib.php
index a17bfdf301..8bc7895d86 100755
--- a/main/inc/lib/display.lib.php
+++ b/main/inc/lib/display.lib.php
@@ -2054,6 +2054,7 @@ class Display
      * @param string $title
      * @param string $footer
      * @param string $style
+     *
      * @return string
      */
     public static function panel($content, $title = '', $footer = '', $style = '')
diff --git a/main/inc/lib/formvalidator/Element/DateRangePicker.php b/main/inc/lib/formvalidator/Element/DateRangePicker.php
index 197efc0e48..970bc7765f 100755
--- a/main/inc/lib/formvalidator/Element/DateRangePicker.php
+++ b/main/inc/lib/formvalidator/Element/DateRangePicker.php
@@ -2,7 +2,7 @@
 /* For licensing terms, see /license.txt */
 
 /**
- * Form element to select a date and hour (with popup datepicker)
+ * Form element to select a range of dates (with popup datepicker)
  */
 class DateRangePicker extends HTML_QuickForm_text
 {
@@ -21,7 +21,7 @@ class DateRangePicker extends HTML_QuickForm_text
     }
 
     /**
-     * HTML code to display this datepicker
+     * @return string
      */
     public function toHtml()
     {
@@ -100,10 +100,12 @@ class DateRangePicker extends HTML_QuickForm_text
     {
         $dates = explode('/', $dateRange);
         $dates = array_map('trim', $dates);
+        $start = isset($dates[0]) ? $dates[0] : '';
+        $end = isset($dates[1]) ? $dates[1] : '';
 
         return array(
-            'start' => $dates[0],
-            'end' => $dates[1]
+            'start' => $start,
+            'end' => $end
         );
     }
 
@@ -117,6 +119,7 @@ class DateRangePicker extends HTML_QuickForm_text
         if (empty($dates['start']) || empty($dates['end'])) {
             return false;
         }
+
         $format = 'Y-m-d H:i';
         $d = DateTime::createFromFormat($format, $dates['start']);
         $resultStart = $d && $d->format($format) == $dates['start'];
diff --git a/main/inc/lib/formvalidator/Element/SelectAjax.php b/main/inc/lib/formvalidator/Element/SelectAjax.php
index dff8633cfb..b71e6b70f9 100644
--- a/main/inc/lib/formvalidator/Element/SelectAjax.php
+++ b/main/inc/lib/formvalidator/Element/SelectAjax.php
@@ -11,7 +11,7 @@ class SelectAjax extends HTML_QuickForm_select
      */
     function SelectAjax($elementName = null, $elementLabel = null, $options = null, $attributes = null)
     {
-        parent::HTML_QuickForm_Select($elementName, $elementLabel, $options, $attributes);
+        parent::__construct($elementName, $elementLabel, $options, $attributes);
     }
 
     /**
diff --git a/main/inc/lib/formvalidator/Element/SelectLanguage.php b/main/inc/lib/formvalidator/Element/SelectLanguage.php
index 43893a557c..1c7cc6be17 100644
--- a/main/inc/lib/formvalidator/Element/SelectLanguage.php
+++ b/main/inc/lib/formvalidator/Element/SelectLanguage.php
@@ -14,7 +14,7 @@ class SelectLanguage extends HTML_QuickForm_select
 		if (!isset($attributes['class'])) {
 			$attributes['class'] = 'chzn-select';
 		}
-		parent::HTML_QuickForm_Select($elementName, $elementLabel, $options, $attributes);
+		parent::__construct($elementName, $elementLabel, $options, $attributes);
 		// Get all languages
 		$languages = api_get_languages();
 		$this->_options = array();
diff --git a/main/inc/lib/formvalidator/Element/SelectTheme.php b/main/inc/lib/formvalidator/Element/SelectTheme.php
index d874266770..903a259814 100644
--- a/main/inc/lib/formvalidator/Element/SelectTheme.php
+++ b/main/inc/lib/formvalidator/Element/SelectTheme.php
@@ -11,10 +11,10 @@ class SelectTheme extends HTML_QuickForm_select
 	 */
 	function SelectTheme($elementName=null, $elementLabel=null, $options=null, $attributes=null) {
 	    if (!isset($attributes['class'])) {
-	        //todo this was comment due a bug in infocours.php with jquery-ui 
+	        //todo this was comment due a bug in infocours.php with jquery-ui
             //$attributes['class'] = 'chzn-select';
-        }        
-		parent::HTML_QuickForm_Select($elementName, $elementLabel, $options, $attributes);
+        }
+		parent::__construct($elementName, $elementLabel, $options, $attributes);
 		// Get all languages
 		$themes = api_get_themes();
 		$this->_options = array();
@@ -22,6 +22,6 @@ class SelectTheme extends HTML_QuickForm_select
 		$this->addOption('--',''); // no theme select
 		for ($i=0; $i< count($themes[0]);$i++) {
 			$this->addOption($themes[1][$i],$themes[0][$i]);
-		}		
+		}
 	}
-}
\ No newline at end of file
+}
diff --git a/main/inc/lib/formvalidator/FormValidator.class.php b/main/inc/lib/formvalidator/FormValidator.class.php
index f5525c097a..fb9eb6855d 100755
--- a/main/inc/lib/formvalidator/FormValidator.class.php
+++ b/main/inc/lib/formvalidator/FormValidator.class.php
@@ -576,7 +576,7 @@ EOT;
     /**
      * @param string $name
      * @param string $label
-     * @param array $options
+     * @param array  $options
      * @param array  $attributes
      *
      * @return HTML_QuickForm_select
diff --git a/main/inc/lib/message.lib.php b/main/inc/lib/message.lib.php
index dac6c1f0f6..941a1a8e84 100755
--- a/main/inc/lib/message.lib.php
+++ b/main/inc/lib/message.lib.php
@@ -884,16 +884,20 @@ class MessageManager
             $message_content .= $user_image.' ';
         }
 
+        $receiverUserInfo = api_get_user_info($row['user_receiver_id']);
+
         $message_content .='<tr>';
         if (api_get_setting('allow_social_tool') == 'true') {
             if ($source == 'outbox') {
-                $message_content .= get_lang('From').': <a href="'.api_get_path(WEB_PATH).'main/social/profile.php?u='.$user_sender_id.'">'.$name.'</a> '.api_strtolower(get_lang('To')).'&nbsp;<b>'.GetFullUserName($row[2]).'</b>';
+                $message_content .= get_lang('From').': <a href="'.api_get_path(WEB_PATH).'main/social/profile.php?u='.$user_sender_id.'">'.$name.'</a> '.
+                    api_strtolower(get_lang('To')).'&nbsp;<b>'.$receiverUserInfo['complete_name'].'</b>';
             } else {
-                $message_content .= get_lang('From').' <a href="'.api_get_path(WEB_PATH).'main/social/profile.php?u='.$user_sender_id.'">'.$name.'</a> '.api_strtolower(get_lang('To')).'&nbsp;<b>'.get_lang('Me').'</b>';
+                $message_content .= get_lang('From').' <a href="'.api_get_path(WEB_PATH).'main/social/profile.php?u='.$user_sender_id.'">'.$name.'</a> '.
+                    api_strtolower(get_lang('To')).'&nbsp;<b>'.get_lang('Me').'</b>';
             }
         } else {
             if ($source == 'outbox') {
-                $message_content .= get_lang('From').':&nbsp;'.$name.'</b> '.api_strtolower(get_lang('To')).' <b>'.GetFullUserName($row['user_receiver_id']).'</b>';
+                $message_content .= get_lang('From').':&nbsp;'.$name.'</b> '.api_strtolower(get_lang('To')).' <b>'.$receiverUserInfo['complete_name'].'</b>';
             } else {
                 $message_content .= get_lang('From').':&nbsp;'.$name.'</b> '.api_strtolower(get_lang('To')).' <b>'.get_lang('Me').'</b>';
             }
diff --git a/main/inc/lib/pear/HTML/QuickForm.php b/main/inc/lib/pear/HTML/QuickForm.php
index 4c4bd55797..2fecedfd85 100755
--- a/main/inc/lib/pear/HTML/QuickForm.php
+++ b/main/inc/lib/pear/HTML/QuickForm.php
@@ -77,6 +77,7 @@ define('QUICKFORM_INVALID_DATASOURCE',     -9);
 // }}}
 
 /**
+ * Class HTML_QuickForm
  * Create, validate and process HTML forms
  *
  * @category    HTML
@@ -98,7 +99,7 @@ class HTML_QuickForm extends HTML_Common
      * @var  array
      * @access   private
      */
-    var $_elements = array();
+    public $_elements = array();
 
     /**
      * Array containing element name to index map
@@ -106,7 +107,7 @@ class HTML_QuickForm extends HTML_Common
      * @var  array
      * @access   private
      */
-    var $_elementIndex = array();
+    public $_elementIndex = array();
 
     /**
      * Array containing indexes of duplicate elements
@@ -114,7 +115,7 @@ class HTML_QuickForm extends HTML_Common
      * @var  array
      * @access   private
      */
-    var $_duplicateIndex = array();
+    public $_duplicateIndex = array();
 
     /**
      * Array containing required field IDs
@@ -122,7 +123,7 @@ class HTML_QuickForm extends HTML_Common
      * @var  array
      * @access   private
      */
-    var $_required = array();
+    public $_required = array();
 
     /**
      * Prefix message in javascript alert if error
@@ -130,7 +131,7 @@ class HTML_QuickForm extends HTML_Common
      * @var  string
      * @access   public
      */
-    var $_jsPrefix = 'Invalid information entered.';
+    public $_jsPrefix = 'Invalid information entered.';
 
     /**
      * Postfix message in javascript alert if error
@@ -138,7 +139,7 @@ class HTML_QuickForm extends HTML_Common
      * @var  string
      * @access   public
      */
-    var $_jsPostfix = 'Please correct these fields.';
+    public $_jsPostfix = 'Please correct these fields.';
 
     /**
      * Datasource object implementing the informal
@@ -147,7 +148,7 @@ class HTML_QuickForm extends HTML_Common
      * @var  object
      * @access   private
      */
-    var $_datasource;
+    public $_datasource;
 
     /**
      * Array of default form values
@@ -155,7 +156,7 @@ class HTML_QuickForm extends HTML_Common
      * @var  array
      * @access   private
      */
-    var $_defaultValues = array();
+    public $_defaultValues = array();
 
     /**
      * Array of constant form values
@@ -163,7 +164,7 @@ class HTML_QuickForm extends HTML_Common
      * @var  array
      * @access   private
      */
-    var $_constantValues = array();
+    public $_constantValues = array();
 
     /**
      * Array of submitted form values
@@ -171,7 +172,7 @@ class HTML_QuickForm extends HTML_Common
      * @var  array
      * @access   private
      */
-    var $_submitValues = array();
+    public $_submitValues = array();
 
     /**
      * Array of submitted form files
@@ -179,7 +180,7 @@ class HTML_QuickForm extends HTML_Common
      * @var  integer
      * @access   public
      */
-    var $_submitFiles = array();
+    public $_submitFiles = array();
 
     /**
      * Value for maxfilesize hidden element if form contains file input
@@ -187,7 +188,7 @@ class HTML_QuickForm extends HTML_Common
      * @var  integer
      * @access   public
      */
-    var $_maxFileSize = 1048576; // 1 Mb = 1048576
+    public $_maxFileSize = 1048576; // 1 Mb = 1048576
 
     /**
      * Flag to know if all fields are frozen
@@ -195,7 +196,7 @@ class HTML_QuickForm extends HTML_Common
      * @var  boolean
      * @access   private
      */
-    var $_freezeAll = false;
+    public $_freezeAll = false;
 
     /**
      * Array containing the form rules
@@ -203,14 +204,14 @@ class HTML_QuickForm extends HTML_Common
      * @var  array
      * @access   private
      */
-    var $_rules = array();
+    public $_rules = array();
 
     /**
      * Form rules, global variety
      * @var     array
      * @access  private
      */
-    var $_formRules = array();
+    public $_formRules = array();
 
     /**
      * Array containing the validation errors
@@ -218,7 +219,7 @@ class HTML_QuickForm extends HTML_Common
      * @var  array
      * @access   private
      */
-    var $_errors = array();
+    public $_errors = array();
 
     /**
      * Note for required fields in the form
@@ -226,14 +227,14 @@ class HTML_QuickForm extends HTML_Common
      * @since     1.0
      * @access    private
      */
-    var $_requiredNote = '<span style="font-size:80%; color:#ff0000;">*</span><span style="font-size:80%;"> denotes required field</span>';
+    public $_requiredNote = '<span style="font-size:80%; color:#ff0000;">*</span><span style="font-size:80%;"> denotes required field</span>';
 
     /**
      * Whether the form was submitted
      * @var       boolean
      * @access    private
      */
-    var $_flagSubmitted = false;
+    public $_flagSubmitted = false;
 
     // }}}
     // {{{ constructor
@@ -258,7 +259,12 @@ class HTML_QuickForm extends HTML_Common
         if (isset($attributes['id']) && !empty($attributes['id'])) {
             $form_id = Security::remove_XSS($attributes['id']);
         }
-        $attributes = array('action'=>$action, 'method'=>$method, 'name'=>$formName, 'id'=>$form_id) + $target;
+        $attributes = array(
+            'action' => $action,
+            'method' => $method,
+            'name' => $formName,
+            'id' => $form_id
+        ) + $target;
         $this->updateAttributes($attributes);
         if (!$trackSubmit || isset($_REQUEST['_qf__' . $formName])) {
             if (1 == get_magic_quotes_gpc()) {
@@ -2059,8 +2065,14 @@ class HTML_QuickForm extends HTML_Common
         return isset($errorMessages[$value]) ? $errorMessages[$value] : $errorMessages[QUICKFORM_ERROR];
     } // end func errorMessage
 
-    // }}}
-} // end class HTML_QuickForm
+    /**
+     * @param HTML_QuickForm_element $element
+     */
+    public function setRequired(HTML_QuickForm_element $element)
+    {
+        $this->addRule($element->getName(), get_lang('ThisFieldIsRequired'), 'required');
+    }
+}
 
 /**
  * Class for errors thrown by HTML_QuickForm package
@@ -2101,6 +2113,4 @@ class HTML_QuickForm_Error extends PEAR_Error {
             $this->PEAR_Error("Invalid error code: $code", QUICKFORM_ERROR, $mode, $level, $debuginfo);
         }
     }
-    // }}}
-} // end class HTML_QuickForm_Error
-?>
+}
diff --git a/main/inc/lib/pear/HTML/QuickForm/advmultiselect.php b/main/inc/lib/pear/HTML/QuickForm/advmultiselect.php
index e899bd1434..9b74b0632e 100755
--- a/main/inc/lib/pear/HTML/QuickForm/advmultiselect.php
+++ b/main/inc/lib/pear/HTML/QuickForm/advmultiselect.php
@@ -282,7 +282,7 @@ class HTML_QuickForm_advmultiselect extends HTML_QuickForm_select
         $opts = $options;
         $options = null;  // prevent to use the default select element load options
 
-        $this->HTML_QuickForm_select($elementName, $elementLabel, $options, $attributes);
+        parent::__construct($elementName, $elementLabel, $options, $attributes);
 
         $this->selectAllCheckBox = isset($attributes['select_all_checkbox']) ? $attributes['select_all_checkbox'] : false;
 
diff --git a/main/inc/lib/pear/HTML/QuickForm/select.php b/main/inc/lib/pear/HTML/QuickForm/select.php
index 80d85d6590..aa08d1b35c 100755
--- a/main/inc/lib/pear/HTML/QuickForm/select.php
+++ b/main/inc/lib/pear/HTML/QuickForm/select.php
@@ -73,7 +73,7 @@ class HTML_QuickForm_select extends HTML_QuickForm_element
      * @access    public
      * @return    void
      */
-    public function HTML_QuickForm_select(
+    public function __construct(
         $elementName = null,
         $elementLabel = null,
         $options = null,
diff --git a/main/inc/lib/pear/HTML/QuickForm/textarea.php b/main/inc/lib/pear/HTML/QuickForm/textarea.php
index e208a1995d..5e33b39840 100755
--- a/main/inc/lib/pear/HTML/QuickForm/textarea.php
+++ b/main/inc/lib/pear/HTML/QuickForm/textarea.php
@@ -42,7 +42,7 @@ class HTML_QuickForm_textarea extends HTML_QuickForm_element
      * @since     1.0
      * @access    private
      */
-    var $_value = null;
+    public $_value = null;
 
     // }}}
     // {{{ constructor
@@ -185,7 +185,7 @@ class HTML_QuickForm_textarea extends HTML_QuickForm_element
      * @access    public
      * @return    string
      */
-    function toHtml()
+    public function toHtml()
     {
         if ($this->_flagFrozen) {
             return $this->getFrozenHtml();
@@ -199,10 +199,7 @@ class HTML_QuickForm_textarea extends HTML_QuickForm_element
                    //
                    '</textarea>';
         }
-    } //end func toHtml
-
-    // }}}
-    // {{{ getFrozenHtml()
+    }
 
     /**
      * Returns the value of field without HTML tags (in this case, value is changed to a mask)
@@ -211,7 +208,7 @@ class HTML_QuickForm_textarea extends HTML_QuickForm_element
      * @access    public
      * @return    string
      */
-    function getFrozenHtml()
+    public function getFrozenHtml()
     {
         // Modified by Ivan Tcholakov, 16-MAR-2010.
         //$value = htmlspecialchars($this->getValue());
@@ -223,9 +220,6 @@ class HTML_QuickForm_textarea extends HTML_QuickForm_element
             $html = nl2br($value)."\n";
         }
         return $html . $this->_getPersistantData();
-    } //end func getFrozenHtml
-
-    // }}}
+    }
 
-} //end class HTML_QuickForm_textarea
-?>
+}
diff --git a/main/inc/lib/social.lib.php b/main/inc/lib/social.lib.php
index a7efeea986..316cd7bfe5 100755
--- a/main/inc/lib/social.lib.php
+++ b/main/inc/lib/social.lib.php
@@ -11,6 +11,9 @@
  */
 class SocialManager extends UserManager
 {
+    /**
+     * Constructor
+     */
     public function __construct()
     {
 
@@ -25,7 +28,8 @@ class SocialManager extends UserManager
     {
         $friend_relation_list = array();
         $tbl_my_friend_relation_type = Database :: get_main_table(TABLE_MAIN_USER_FRIEND_RELATION_TYPE);
-        $sql = 'SELECT id,title FROM '.$tbl_my_friend_relation_type.' WHERE id<>6 ORDER BY id ASC';
+        $sql = 'SELECT id,title FROM '.$tbl_my_friend_relation_type.'
+                WHERE id<>6 ORDER BY id ASC';
         $result = Database::query($sql);
         while ($row = Database::fetch_array($result, 'ASSOC')) {
             $friend_relation_list[] = $row;
@@ -100,14 +104,23 @@ class SocialManager extends UserManager
         $tbl_my_friend = Database :: get_main_table(TABLE_MAIN_USER_REL_USER);
         $tbl_my_user = Database :: get_main_table(TABLE_MAIN_USER);
         $sql = 'SELECT friend_user_id FROM '.$tbl_my_friend.'
-                WHERE relation_type NOT IN ('.USER_RELATION_TYPE_DELETED.', '.USER_RELATION_TYPE_RRHH.') AND friend_user_id<>'.((int) $user_id).' AND user_id='.((int) $user_id);
+                WHERE
+                    relation_type NOT IN ('.USER_RELATION_TYPE_DELETED.', '.USER_RELATION_TYPE_RRHH.') AND
+                    friend_user_id<>'.((int) $user_id).' AND
+                    user_id='.((int) $user_id);
         if (isset($id_group) && $id_group > 0) {
             $sql.=' AND relation_type='.$id_group;
         }
         if (isset($search_name)) {
             $search_name = trim($search_name);
             $search_name = str_replace(' ', '', $search_name);
-            $sql.=' AND friend_user_id IN (SELECT user_id FROM '.$tbl_my_user.' WHERE firstName LIKE "%'.Database::escape_string($search_name).'%" OR lastName LIKE "%'.Database::escape_string($search_name).'%"   OR    '.(api_is_western_name_order() ? 'concat(firstName, lastName)' : 'concat(lastName, firstName)').' like concat("%","'.Database::escape_string($search_name).'","%")    ) ';
+            $sql.=' AND friend_user_id IN (
+                SELECT user_id FROM '.$tbl_my_user.'
+                WHERE
+                    firstName LIKE "%'.Database::escape_string($search_name).'%" OR
+                    lastName LIKE "%'.Database::escape_string($search_name).'%" OR
+                    '.(api_is_western_name_order() ? 'concat(firstName, lastName)' : 'concat(lastName, firstName)').' LIKE concat("%","'.Database::escape_string($search_name).'","%")
+                ) ';
         }
 
         $res = Database::query($sql);
@@ -144,7 +157,12 @@ class SocialManager extends UserManager
         $list_ids = self::get_friends($user_id, $id_group, $search_name);
         if (is_array($list_ids)) {
             foreach ($list_ids as $values_ids) {
-                $list_path_image_friend[] = UserManager::get_user_picture_path_by_id($values_ids['friend_user_id'], 'web', false, true);
+                $list_path_image_friend[] = UserManager::get_user_picture_path_by_id(
+                    $values_ids['friend_user_id'],
+                    'web',
+                    false,
+                    true
+                );
                 $combine_friend = array(
                     'id_friend' => $list_ids,
                     'path_friend' => $list_path_image_friend
@@ -189,7 +207,7 @@ class SocialManager extends UserManager
      */
     public static function send_invitation_friend($user_id, $friend_id, $message_title, $message_content)
     {
-        $tbl_message = Database::get_main_table(TABLE_MAIN_MESSAGE);
+        $tbl_message = Database::get_main_table(TABLE_MESSAGE);
         $user_id = intval($user_id);
         $friend_id = intval($friend_id);
 
@@ -202,7 +220,11 @@ class SocialManager extends UserManager
         $now = api_get_utc_datetime();
 
         $sql_exist = 'SELECT COUNT(*) AS count FROM '.$tbl_message.'
-                      WHERE user_sender_id='.$user_id.' AND user_receiver_id='.$friend_id.' AND msg_status IN(5,6,7);';
+                      WHERE
+                        user_sender_id='.$user_id.' AND
+                        user_receiver_id='.$friend_id.' AND
+                        msg_status IN(5,6,7);
+                    ';
 
         $res_exist = Database::query($sql_exist);
         $row_exist = Database::fetch_array($res_exist, 'ASSOC');
@@ -249,9 +271,11 @@ class SocialManager extends UserManager
      */
     public static function get_message_number_invitation_by_user_id($user_receiver_id)
     {
-        $tbl_message = Database::get_main_table(TABLE_MAIN_MESSAGE);
+        $tbl_message = Database::get_main_table(TABLE_MESSAGE);
         $sql = 'SELECT COUNT(*) as count_message_in_box FROM '.$tbl_message.'
-                WHERE user_receiver_id='.intval($user_receiver_id).' AND msg_status='.MESSAGE_STATUS_INVITATION_PENDING;
+                WHERE
+                    user_receiver_id='.intval($user_receiver_id).' AND
+                    msg_status='.MESSAGE_STATUS_INVITATION_PENDING;
         $res = Database::query($sql);
         $row = Database::fetch_array($res, 'ASSOC');
         return $row['count_message_in_box'];
@@ -265,10 +289,12 @@ class SocialManager extends UserManager
      */
     public static function get_list_invitation_of_friends_by_user_id($user_id)
     {
-        $tbl_message = Database::get_main_table(TABLE_MAIN_MESSAGE);
+        $tbl_message = Database::get_main_table(TABLE_MESSAGE);
         $sql = 'SELECT user_sender_id,send_date,title,content
                 FROM '.$tbl_message.'
-                WHERE user_receiver_id='.intval($user_id).' AND msg_status = '.MESSAGE_STATUS_INVITATION_PENDING;
+                WHERE
+                    user_receiver_id='.intval($user_id).' AND
+                    msg_status = '.MESSAGE_STATUS_INVITATION_PENDING;
         $res = Database::query($sql);
         $list_friend_invitation = array();
         while ($row = Database::fetch_array($res, 'ASSOC')) {
@@ -286,7 +312,7 @@ class SocialManager extends UserManager
     public static function get_list_invitation_sent_by_user_id($user_id)
     {
         $list_friend_invitation = array();
-        $tbl_message = Database::get_main_table(TABLE_MAIN_MESSAGE);
+        $tbl_message = Database::get_main_table(TABLE_MESSAGE);
         $sql = 'SELECT user_receiver_id, send_date,title,content
                 FROM '.$tbl_message.'
                 WHERE user_sender_id = '.intval($user_id).' AND msg_status = '.MESSAGE_STATUS_INVITATION_PENDING;
@@ -306,7 +332,7 @@ class SocialManager extends UserManager
      */
     public static function invitation_accepted($user_send_id, $user_receiver_id)
     {
-        $tbl_message = Database::get_main_table(TABLE_MAIN_MESSAGE);
+        $tbl_message = Database::get_main_table(TABLE_MESSAGE);
         $sql = "UPDATE $tbl_message
                 SET msg_status = ".MESSAGE_STATUS_INVITATION_ACCEPTED."
                 WHERE
@@ -325,7 +351,7 @@ class SocialManager extends UserManager
      */
     public static function invitation_denied($user_send_id, $user_receiver_id)
     {
-        $tbl_message = Database::get_main_table(TABLE_MAIN_MESSAGE);
+        $tbl_message = Database::get_main_table(TABLE_MESSAGE);
         $sql = 'DELETE FROM '.$tbl_message.'
                 WHERE
                     user_sender_id =  '.((int) $user_send_id).' AND
@@ -420,7 +446,11 @@ class SocialManager extends UserManager
             if (!empty($rss->items)) {
                 $icon_rss = '';
                 if (!empty($feed)) {
-                    $icon_rss = Display::url(Display::return_icon('social_rss.png', '', array(), 22), Security::remove_XSS($feed['rssfeeds']), array('target' => '_blank'));
+                    $icon_rss = Display::url(
+                        Display::return_icon('social_rss.png', '', array(), 22),
+                        Security::remove_XSS($feed['rssfeeds']),
+                        array('target' => '_blank')
+                    );
                 }
 
                 $res .= '<h3 class="title-rss">'.$icon_rss.' '.$rss->channel['title'].'</h3>';
@@ -1118,7 +1148,7 @@ class SocialManager extends UserManager
      */
     public static function sendWallMessage($userId, $friendId, $messageContent, $messageId = 0 ,$messageStatus)
     {
-        $tblMessage = Database::get_main_table(TABLE_MAIN_MESSAGE);
+        $tblMessage = Database::get_main_table(TABLE_MESSAGE);
         $userId = intval($userId);
         $friendId = intval($friendId);
         $messageId = intval($messageId);
@@ -1217,24 +1247,23 @@ class SocialManager extends UserManager
         if (empty($start)) {
             $start = '0000-00-00';
         }
-        $tblMessage = Database::get_main_table(TABLE_MAIN_MESSAGE);
+        $tblMessage = Database::get_main_table(TABLE_MESSAGE);
+        $tblMessageAttachement = Database::get_main_table(TABLE_MESSAGE_ATTACHMENT);
+
         $userId = intval($userId);
         $start = Database::escape_string($start);
-        // TODO: set a maximum of 3 months for messages
-        //if ($start == '0000-00-00') {
-        //
-        //}
         $limit = intval($limit);
-        $messages = array();
+
         $sql = "SELECT id, user_sender_id,user_receiver_id, send_date, content, parent_id,
-          (SELECT ma.path from message_attachment ma WHERE  ma.message_id = tm.id ) as path,
-          (SELECT ma.filename from message_attachment ma WHERE  ma.message_id = tm.id ) as filename
-            FROM $tblMessage tm
-            WHERE user_receiver_id = $userId
+                  (SELECT ma.path FROM $tblMessageAttachement ma WHERE  ma.message_id = tm.id ) as path,
+                  (SELECT ma.filename FROM $tblMessageAttachement ma WHERE  ma.message_id = tm.id ) as filename
+                FROM $tblMessage tm
+                WHERE user_receiver_id = $userId
                 AND send_date > '$start' ";
         $sql .= (empty($messageStatus) || is_null($messageStatus)) ? '' : " AND msg_status = '$messageStatus' ";
         $sql .= (empty($parentId) || is_null($parentId)) ? '' : " AND parent_id = '$parentId' ";
         $sql .= " ORDER BY send_date DESC LIMIT $offset, $limit ";
+        $messages = array();
         $res = Database::query($sql);
         if (Database::num_rows($res) > 0) {
             while ($row = Database::fetch_array($res)) {
@@ -1284,7 +1313,7 @@ class SocialManager extends UserManager
             if ($isOwnWall) {
                 $media .= '<div class="pull-right deleted-mgs">';
                 $media .= '<a title="'.get_lang("SocialMessageDelete").'" href="'.api_get_path(WEB_CODE_PATH).'social/profile.php?messageId='.
-                    $message['id'].'">'.get_lang('x').'</a>';
+                    $message['id'].'">x</a>';
                 $media .= '</div>';
             }
             $media .= '<div class="user-image">';
@@ -1404,11 +1433,10 @@ class SocialManager extends UserManager
             $wallImage = '<a class="thumbnail ajax" href="'.$imageBig.'"><img src="'.$imageSmall.'"></a>';
         }
 
-
         $htmlDelete = '';
         if ($isOwnWall) {
             $htmlDelete .= '<a title="'.get_lang("SocialMessageDelete").'" href="'.api_get_path(WEB_CODE_PATH).'social/profile.php?messageId='.
-            $message['id'].'">'.get_lang('x').'</a>';
+            $message['id'].'">x</a>';
         }
 
         $html = '';
@@ -1523,6 +1551,7 @@ class SocialManager extends UserManager
 
     /**
      * Generate the social block for a user
+     * @param Template $template
      * @param int $userId The user id
      * @param string $groupBlock Optional. Highlight link possible values:
      * group_add, home, messages, messages_inbox, messages_compose,
@@ -1530,7 +1559,7 @@ class SocialManager extends UserManager
      * @param int $groupId Optional. Group ID
      * @return string The HTML code with the social block
      */
-    public static function setSocialUserBlock($template, $userId, $groupBlock = '', $groupId = 0)
+    public static function setSocialUserBlock(Template $template, $userId, $groupBlock = '', $groupId = 0)
     {
         if (api_get_setting('allow_social_tool') != 'true') {
             return '';
@@ -1548,4 +1577,106 @@ class SocialManager extends UserManager
         $template->assign('profileEditionLink', $profileEditionLink);
         $template->assign('social_avatar_block', $template->fetch('default/social/user_block.tpl'));
     }
+
+    /**
+     * @param $user_id
+     * @param $link_shared
+     * @param $show_full_profile
+     * @return string
+     */
+    public static function listMyFriends($user_id, $link_shared, $show_full_profile)
+    {
+        //SOCIALGOODFRIEND , USER_RELATION_TYPE_FRIEND, USER_RELATION_TYPE_PARENT
+        $friends = SocialManager::get_friends($user_id, USER_RELATION_TYPE_FRIEND);
+        $number_of_images = 30;
+        $number_friends = count($friends);
+
+        $friendHtml = '<div class="nav-list"><h3>'.get_lang('SocialFriend').'<span>(' . $number_friends . ')</span></h3></div>';
+
+        if ($number_friends != 0) {
+            if ($number_friends > $number_of_images) {
+                if (api_get_user_id() == $user_id) {
+                    $friendHtml.= ' : <span><a href="friends.php">'.get_lang('SeeAll').'</a></span>';
+                } else {
+                    $friendHtml.= ' : <span>'
+                        .'<a href="'.api_get_path(WEB_CODE_PATH).'social/profile_friends_and_groups.inc.php'
+                        .'?view=friends&height=390&width=610&user_id='.$user_id.'"'
+                        .'class="ajax" title="'.get_lang('SeeAll').'" >'.get_lang('SeeAll').'</a></span>';
+                }
+            }
+
+            $friendHtml.= '<ul class="nav nav-list">';
+            $j = 1;
+            for ($k=0; $k < $number_friends; $k++) {
+                if ($j > $number_of_images) break;
+
+                if (isset($friends[$k])) {
+                    $friend = $friends[$k];
+                    $name_user    = api_get_person_name($friend['firstName'], $friend['lastName']);
+                    $user_info_friend = api_get_user_info($friend['friend_user_id'], true);
+
+                    if ($user_info_friend['user_is_online']) {
+                        $statusIcon = Display::span('', array('class' => 'online_user_in_text'));
+                    } else {
+                        $statusIcon = Display::span('', array('class' => 'offline_user_in_text'));
+                    }
+
+                    $friendHtml.= '<li class="">';
+                    // the height = 92 must be the same in the image_friend_network span style in default.css
+                    $friends_profile = SocialManager::get_picture_user($friend['friend_user_id'], $friend['image'], 20, USER_IMAGE_SIZE_SMALL);
+                    $friendHtml.= '<img src="'.$friends_profile['file'].'" id="imgfriend_'.$friend['friend_user_id'].'" title="'.$name_user.'"/>';
+                    $link_shared = (empty($link_shared)) ? '' : '&'.$link_shared;
+                    $friendHtml.= $statusIcon .'<a href="profile.php?' .'u=' . $friend['friend_user_id'] . $link_shared . '">' . $name_user .'</a>';
+                    $friendHtml.= '</li>';
+                }
+                $j++;
+            }
+            $friendHtml.='</ul>';
+        } else {
+            $friendHtml.= '<div class="">'.get_lang('NoFriendsInYourContactList').'<br />'
+                .'<a class="btn" href="'.api_get_path(WEB_PATH).'whoisonline.php">'. get_lang('TryAndFindSomeFriends').'</a></div>';
+        }
+
+        return $friendHtml;
+    }
+
+    /**
+     * @return string
+     */
+    public static function getWallForm()
+    {
+        $form = new FormValidator(
+            'social_wall_main',
+            'post',
+            api_get_path(WEB_CODE_PATH).'social/profile.php',
+            null,
+            array('enctype' => 'multipart/form-data')
+        );
+
+        $form->addTextarea('social_wall_new_msg_main', null, array('placeholder' => get_lang('SocialWallWhatAreYouThinkingAbout')));
+        $form->addButtonSend(get_lang('Post'));
+        $html = Display::panel($form->returnForm(), get_lang('SocialWall'));
+
+        return $html;
+    }
+
+    /**
+     * @param int $userId
+     * @param int $friendId
+     * @return string
+     */
+    public static function getWallMessagesByUser($userId, $friendId)
+    {
+        $messages = SocialManager::getWallMessagesPostHTML($userId, $friendId);
+        $html = '';
+
+        foreach ($messages as $message) {
+            $post = $message['html'];
+            $comment = SocialManager::getWallMessagesHTML($userId, $friendId, $message['id']);
+
+            $html .= $post.$comment;
+        }
+
+        return $html;
+    }
 }
diff --git a/main/inc/lib/statistics.lib.php b/main/inc/lib/statistics.lib.php
index 5ee2c63d40..50eb4758a7 100644
--- a/main/inc/lib/statistics.lib.php
+++ b/main/inc/lib/statistics.lib.php
@@ -703,7 +703,7 @@ class Statistics
      */
     public static function getMessages($messageType)
     {
-        $message_table = Database::get_main_table(TABLE_MAIN_MESSAGE);
+        $message_table = Database::get_main_table(TABLE_MESSAGE);
         $user_table = Database::get_main_table(TABLE_MAIN_USER);
         $access_url_rel_user_table = Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
 
diff --git a/main/inc/lib/usermanager.lib.php b/main/inc/lib/usermanager.lib.php
index 26183fe95c..72691c2dfe 100755
--- a/main/inc/lib/usermanager.lib.php
+++ b/main/inc/lib/usermanager.lib.php
@@ -4062,7 +4062,7 @@ class UserManager
     public static function remove_user_rel_user($friend_id, $real_removed = false, $with_status_condition = '')
     {
         $tbl_my_friend = Database :: get_main_table(TABLE_MAIN_USER_REL_USER);
-        $tbl_my_message = Database :: get_main_table(TABLE_MAIN_MESSAGE);
+        $tbl_my_message = Database :: get_main_table(TABLE_MESSAGE);
         $friend_id = intval($friend_id);
 
         if ($real_removed) {
diff --git a/main/install/database.sql b/main/install/database.sql
index a03c8cd9ed..76ca1ac1f5 100644
--- a/main/install/database.sql
+++ b/main/install/database.sql
@@ -1380,6 +1380,7 @@ CREATE TABLE IF NOT EXISTS gradebook_category (
     generate_certificates TINYINT NOT NULL DEFAULT 0,
     PRIMARY KEY  (id)
 );
+
 DROP TABLE IF EXISTS gradebook_evaluation;
 CREATE TABLE IF NOT EXISTS gradebook_evaluation (
     id int unsigned NOT NULL auto_increment,
@@ -1396,6 +1397,7 @@ CREATE TABLE IF NOT EXISTS gradebook_evaluation (
     locked int NOT NULL DEFAULT 0,
     PRIMARY KEY  (id)
 );
+
 DROP TABLE IF EXISTS gradebook_link;
 CREATE TABLE IF NOT EXISTS gradebook_link (
   id int NOT NULL auto_increment,
@@ -2355,116 +2357,6 @@ INSERT INTO system_template (title, comment, image, content) VALUES
             </body>
 ');
 
-
---
--- --------------------------------------------------------
---
--- Tables for reservation
---
-
-
---
--- Table structure for table reservation category
---
-
-DROP TABLE IF EXISTS reservation_category;
-CREATE TABLE IF NOT EXISTS reservation_category (
-   id  int unsigned NOT NULL auto_increment,
-   parent_id  int NOT NULL default 0,
-   name  varchar(128) NOT NULL default '',
-  PRIMARY KEY  ( id )
-);
-
---
--- Table structure for table reservation category_rights
---
-
-DROP TABLE IF EXISTS reservation_category_rights;
-CREATE TABLE IF NOT EXISTS reservation_category_rights  (
-    id  int unsigned NOT NULL auto_increment,
-    category_id  int NOT NULL default 0,
-    class_id  int NOT NULL default 0,
-    m_items  tinyint NOT NULL default 0,
-    PRIMARY KEY  ( id )
-);
-
---
--- Table structure for table  item reservation
---
-DROP TABLE IF EXISTS reservation_item;
-CREATE TABLE IF NOT EXISTS  reservation_item  (
-   id  int unsigned NOT NULL auto_increment,
-   category_id  int unsigned NOT NULL default 0,
-   course_code  varchar(40) NOT NULL default '',
-   name  varchar(128) NOT NULL default '',
-   description  text NOT NULL,
-   blackout  tinyint NOT NULL default 0,
-   creator  int unsigned NOT NULL default 0,
-   always_available TINYINT NOT NULL default 0,
-  PRIMARY KEY  ( id )
-);
-
--- --------------------------------------------------------
-
---
--- Table structure for table reservation item_rights
---
-
-DROP TABLE IF EXISTS reservation_item_rights;
-CREATE TABLE IF NOT EXISTS  reservation_item_rights  (
-   item_id  int unsigned NOT NULL default 0,
-   class_id  int unsigned NOT NULL default 0,
-   edit_right  tinyint unsigned NOT NULL default 0,
-   delete_right  tinyint unsigned NOT NULL default 0,
-   m_reservation  tinyint unsigned NOT NULL default 0,
-   view_right  tinyint NOT NULL default 0,
-  PRIMARY KEY  ( item_id , class_id )
-);
-
--- --------------------------------------------------------
-
---
--- Table structure for main reservation table
---
-
-DROP TABLE IF EXISTS reservation_main;
-CREATE TABLE IF NOT EXISTS  reservation_main  (
-   id  int unsigned NOT NULL auto_increment,
-   subid  int unsigned NOT NULL default 0,
-   item_id  int unsigned NOT NULL default 0,
-   auto_accept  tinyint unsigned NOT NULL default 0,
-   max_users  int unsigned NOT NULL default 1,
-   start_at  datetime NOT NULL default '0000-00-00 00:00:00',
-   end_at  datetime NOT NULL default '0000-00-00 00:00:00',
-   subscribe_from  datetime NOT NULL default '0000-00-00 00:00:00',
-   subscribe_until  datetime NOT NULL default '0000-00-00 00:00:00',
-   subscribers  int unsigned NOT NULL default 0,
-   notes  text NOT NULL,
-   timepicker  tinyint NOT NULL default 0,
-   timepicker_min  int NOT NULL default 0,
-   timepicker_max  int NOT NULL default 0,
-  PRIMARY KEY  ( id )
-);
-
--- --------------------------------------------------------
-
---
--- Table structure for reservation subscription table
---
-
-DROP TABLE IF EXISTS reservation_subscription;
-CREATE TABLE IF NOT EXISTS  reservation_subscription  (
-   dummy  int unsigned NOT NULL auto_increment,
-   user_id  int unsigned NOT NULL default 0,
-   reservation_id  int unsigned NOT NULL default 0,
-   accepted  tinyint unsigned NOT NULL default 0,
-   start_at  datetime NOT NULL default '0000-00-00 00:00:00',
-   end_at  datetime NOT NULL default '0000-00-00 00:00:00',
-  PRIMARY KEY  ( dummy )
-);
-
--- ---------------------------------------------------------
-
 --
 -- Table structure for table user_rel_user
 --
@@ -3184,7 +3076,7 @@ DROP TABLE IF EXISTS track_e_access;
 CREATE TABLE track_e_access (
   access_id int NOT NULL auto_increment,
   access_user_id int unsigned default NULL,
-  access_date datetime NOT NULL default '0000-00-00 00:00:00',
+  access_date datetime NOT NULL,
   c_id int not null,
   access_tool varchar(30) default NULL,
   access_session_id int NOT NULL default 0,
@@ -3198,7 +3090,7 @@ DROP TABLE IF EXISTS track_e_lastaccess;
 CREATE TABLE track_e_lastaccess (
   access_id bigint NOT NULL auto_increment,
   access_user_id int unsigned default NULL,
-  access_date datetime NOT NULL default '0000-00-00 00:00:00',
+  access_date datetime NOT NULL,
   c_id int not null,
   access_tool varchar(30) default NULL,
   access_session_id int unsigned default NULL,
@@ -3212,8 +3104,8 @@ DROP TABLE IF EXISTS track_e_default;
 CREATE TABLE track_e_default (
   default_id int NOT NULL auto_increment,
   default_user_id int unsigned NOT NULL default 0,
-  c_id int not null,
-  default_date datetime NOT NULL default '0000-00-00 00:00:00',
+  c_id int default NULL,
+  default_date datetime NOT NULL,
   default_event_type varchar(20) NOT NULL default '',
   default_value_type varchar(20) NOT NULL default '',
   default_value text NOT NULL,
@@ -3225,7 +3117,7 @@ DROP TABLE IF EXISTS track_e_downloads;
 CREATE TABLE track_e_downloads (
   down_id int NOT NULL auto_increment,
   down_user_id int unsigned default NULL,
-  down_date datetime NOT NULL default '0000-00-00 00:00:00',
+  down_date datetime NOT NULL,
   c_id int NOT NULL,
   down_doc_path varchar(255) NOT NULL default '',
   down_session_id INT NOT NULL DEFAULT 0,
@@ -4727,5 +4619,5 @@ CREATE TABLE c_attendance_calendar_rel_group (
 
 -- Version
 LOCK TABLES settings_current WRITE;
-UPDATE settings_current SET selected_value = '1.10.0.31' WHERE variable = 'chamilo_database_version';
+UPDATE settings_current SET selected_value = '1.10.0.33' WHERE variable = 'chamilo_database_version';
 UNLOCK TABLES;
diff --git a/main/install/migrate-db-1.9.0-1.10.0-pre.sql b/main/install/migrate-db-1.9.0-1.10.0-pre.sql
index 10befbc9c8..770cb458ea 100644
--- a/main/install/migrate-db-1.9.0-1.10.0-pre.sql
+++ b/main/install/migrate-db-1.9.0-1.10.0-pre.sql
@@ -1,18 +1,8 @@
 -- This script updates the databases structure before migrating the data from
 -- version 1.9.0 (or version 1.9.*) to version 1.10.0
--- it is intended as a standalone script, however, because of the multiple
--- databases related difficulties, it should be parsed by a PHP script in
--- order to connect to and update the right databases.
--- There is one line per query, allowing the PHP function file() to read
--- all lines separately into an array. The xxMAINxx-type markers are there
--- to tell the PHP script which database we're talking about.
--- By always using the keyword "TABLE" in the queries, we should be able
--- to retrieve and modify the table name from the PHP script if needed, which
--- will allow us to deal with the unique-database-type installations
---
--- This first part is for the main database
-
--- xxMAINxx
+
+-- Main DB changes
+
 ALTER TABLE skill_rel_user ADD COLUMN course_id INT NOT NULL DEFAULT 0 AFTER id;
 ALTER TABLE skill_rel_user ADD COLUMN session_id INT NOT NULL DEFAULT 0 AFTER course_id;
 ALTER TABLE skill_rel_user ADD INDEX idx_select_cs (course_id, session_id);
@@ -88,6 +78,11 @@ ALTER TABLE user MODIFY COLUMN registration_date datetime NOT NULL;
 UPDATE user SET registration_date = NULL WHERE registration_date = '0000-00-00 00:00:00';
 UPDATE user SET expiration_date = NULL WHERE expiration_date = '0000-00-00 00:00:00';
 
+UPDATE track_e_default SET default_date = NULL WHERE default_date = '0000-00-00 00:00:00';
+UPDATE track_e_lastaccess SET access_date = NULL WHERE access_date = '0000-00-00 00:00:00';
+UPDATE track_e_downloads SET down_date = NULL WHERE down_date = '0000-00-00 00:00:00';
+UPDATE track_e_access SET access_date = NULL WHERE access_date = '0000-00-00 00:00:00';
+
 ALTER TABLE course ADD COLUMN add_teachers_to_sessions_courses tinyint NOT NULL default 0;
 
 DELETE FROM settings_options WHERE variable = 'show_glossary_in_extra_tools';
@@ -106,8 +101,10 @@ INSERT INTO settings_options (variable, value, display_text) VALUES ('enabled_ma
 INSERT INTO settings_options (variable, value, display_text) VALUES ('enabled_mathjax', 'false', 'No');
 
 ALTER TABLE session MODIFY COLUMN name char(100) NOT NULL DEFAULT '';
+ALTER TABLE track_e_default MODIFY COLUMN c_id int default NULL;
+UPDATE course_field SET field_type = 1 WHERE field_variable = 'special_course';
 
--- xxCOURSExx
+-- Course DB changes (c_*)
 
 ALTER TABLE c_survey ADD COLUMN visible_results INT UNSIGNED DEFAULT 0;
 ALTER TABLE c_survey_invitation ADD COLUMN group_id INT NOT NULL;
@@ -124,7 +121,6 @@ CREATE TABLE IF NOT EXISTS c_student_publication_rel_user (id  INT PRIMARY KEY N
 CREATE TABLE IF NOT EXISTS c_student_publication_comment (id INT PRIMARY KEY NOT NULL AUTO_INCREMENT, work_id INT NOT NULL, c_id INT NOT NULL, comment text, file VARCHAR(255), user_id int NOT NULL, sent_at datetime NOT NULL);
 CREATE TABLE IF NOT EXISTS c_attendance_calendar_rel_group (id int NOT NULL auto_increment PRIMARY KEY, c_id INT NOT NULL, group_id INT NOT NULL, calendar_id INT NOT NULL);
 
-UPDATE course_field SET field_type = 1 WHERE field_variable = 'special_course';
 
 -- Do not move this query
-UPDATE settings_current SET selected_value = '1.10.0.31' WHERE variable = 'chamilo_database_version';
+UPDATE settings_current SET selected_value = '1.10.0.33' WHERE variable = 'chamilo_database_version';
diff --git a/main/messages/new_message.php b/main/messages/new_message.php
index cf8d0b4a6b..d231ea0eb5 100755
--- a/main/messages/new_message.php
+++ b/main/messages/new_message.php
@@ -118,7 +118,7 @@ $nameTools = get_lang('ComposeMessage');
 /**
 * Shows the compose area + a list of users to select from.
 */
-function show_compose_to_any ($user_id) {
+function show_compose_to_any($user_id) {
 	$online_user_list = MessageManager::get_online_user_list($user_id);
 	$default['user_list'] = 0;
 	$online_user_list=null;
@@ -129,26 +129,23 @@ function show_compose_to_any ($user_id) {
 function show_compose_reply_to_message($message_id, $receiver_id)
 {
 	$table_message = Database::get_main_table(TABLE_MESSAGE);
-	$query = "SELECT user_sender_id FROM $table_message WHERE user_receiver_id=".intval($receiver_id)." AND id='".intval($message_id)."';";
+	$query = "SELECT user_sender_id FROM $table_message
+			  WHERE user_receiver_id=".intval($receiver_id)." AND id='".intval($message_id)."';";
 	$result = Database::query($query);
 	$row = Database::fetch_array($result,'ASSOC');
 	if (!isset($row['user_sender_id'])) {
 		$html = get_lang('InvalidMessageId');
+
 		return $html;
 	}
-	$pre_html = '<div class="control-group">
-				<label class="control-label">'.get_lang('SendMessageTo').': </label>
-				<div class="controls">';
-	$post = '</div></div>';
-    $sent_to = $pre_html.'<strong>'.GetFullUserName($row['user_sender_id']).'</strong>'.$post;
+	$userInfo = api_get_user_info($row['user_sender_id']);
 	$default['users'] = array($row['user_sender_id']);
-	$html .= manage_form($default, null, $sent_to);
+	$html = manage_form($default, null, $userInfo['complete_name']);
 
     return $html;
 }
 
 function show_compose_to_user ($receiver_id) {
-	global $charset;
 	$html = get_lang('To').':&nbsp;<strong>'.GetFullUserName($receiver_id).'</strong>';
 	$default['title'] = api_xml_http_response_encode(get_lang('EnterTitle'));
 	$default['users'] = array($receiver_id);
@@ -156,7 +153,8 @@ function show_compose_to_user ($receiver_id) {
     return $html;
 }
 
-function manage_form($default, $select_from_user_list = null, $sent_to = null) {
+function manage_form($default, $select_from_user_list = null, $sent_to = null)
+{
 	$group_id 		= isset($_REQUEST['group_id']) ? intval($_REQUEST['group_id']) : null;
 	$message_id 	= isset($_GET['message_id'])  ?  intval($_GET['message_id']) : null;
 	$param_f 		= isset($_GET['f']) && $_GET['f'] == 'social' ? 'social' : null;
@@ -169,7 +167,6 @@ function manage_form($default, $select_from_user_list = null, $sent_to = null) {
                 get_lang('SendMessageTo'),
                 true,
                 array(
-                    'class' => 'span4',
                     'id'=>'id_text_name',
                     'onkeyup'=>'send_request_and_search()',
                     'autocomplete'=>'off'
@@ -180,7 +177,7 @@ function manage_form($default, $select_from_user_list = null, $sent_to = null) {
 			$form->addElement('hidden','user_list', 0, array('id'=>'user_list'));
 		} else {
             if (!empty($sent_to)) {
-                $form->addElement('html',$sent_to);
+                $form->addLabel(get_lang('SendMessageTo'), $sent_to);
             }
 			if (empty($default['users'])) {
                 //fb select
@@ -197,7 +194,7 @@ function manage_form($default, $select_from_user_list = null, $sent_to = null) {
 		$form->addElement('hidden','parent_id',$message_id);
 	}
 
-	$form->addText('title', get_lang('Subject'), true, array('class' => 'col-md-4'));
+	$form->addText('title', get_lang('Subject'), true);
 	$form->addHtmlEditor('content', get_lang('Message'), false, false, array('ToolbarSet' => 'Messages', 'Width' => '100%', 'Height' => '250'));
 
 	if (isset($_GET['re_id'])) {
@@ -223,7 +220,7 @@ function manage_form($default, $select_from_user_list = null, $sent_to = null) {
 		$form->addElement('advanced_settings','<span id="link-more-attach"><a href="javascript://" onclick="return add_image_form()">'.get_lang('AddOneMoreFile').'</a></span>&nbsp;('.sprintf(get_lang('MaximunFileSizeX'),format_file_size(api_get_setting('message_max_upload_filesize'))).')');
 	}
 
-	$form->addElement('style_submit_button','compose',api_xml_http_response_encode('<i class="fa fa-paper-plane"></i> '.get_lang('SendMessage')),'class="btn-success"');
+	$form->addButtonSend(get_lang('SendMessage'), 'compose');
 	$form->setRequiredNote('<span class="form_required">*</span> <small>'.get_lang('ThisFieldIsRequired').'</small>');
 
 	if (!empty($group_id) && !empty($message_id)) {
@@ -270,13 +267,15 @@ function manage_form($default, $select_from_user_list = null, $sent_to = null) {
 		$token = Security::get_token();
 		$form->addElement('hidden','sec_token');
 		$form->setConstants(array('sec_token' => $token));
-		$html .= $form->return_form();
+		$html .= $form->returnForm();
 	}
     return $html;
 }
 
+$socialToolIsActive = isset($_GET['f']) && $_GET['f'] == 'social';
+
 /* MAIN SECTION */
-if ($_GET['f']=='social') {
+if ($socialToolIsActive) {
 	$this_section = SECTION_SOCIAL;
 	$interbreadcrumb[]= array ('url' => api_get_path(WEB_PATH).'main/social/home.php','name' => get_lang('SocialNetwork'));
 } else {
@@ -288,11 +287,13 @@ $group_id = isset($_REQUEST['group_id']) ? intval($_REQUEST['group_id']) : null;
 $social_right_content = null;
 if ($group_id != 0) {
 	$social_right_content .= '<div class=actions>';
-	$social_right_content .= '<a href="'.api_get_path(WEB_PATH).'main/social/groups.php?id='.$group_id.'">'.Display::return_icon('back.png',api_xml_http_response_encode(get_lang('ComposeMessage'))).'</a>';
-	$social_right_content .= '<a href="'.api_get_path(WEB_PATH).'main/messages/new_message.php?group_id='.$group_id.'">'.Display::return_icon('message_new.png',api_xml_http_response_encode(get_lang('ComposeMessage'))).'</a>';
+	$social_right_content .= '<a href="'.api_get_path(WEB_PATH).'main/social/groups.php?id='.$group_id.'">'.
+		Display::return_icon('back.png',api_xml_http_response_encode(get_lang('ComposeMessage'))).'</a>';
+	$social_right_content .= '<a href="'.api_get_path(WEB_PATH).'main/messages/new_message.php?group_id='.$group_id.'">'.
+		Display::return_icon('message_new.png',api_xml_http_response_encode(get_lang('ComposeMessage'))).'</a>';
 	$social_right_content .= '</div>';
 } else {
-	if ($_GET['f']=='social') {
+	if ($socialToolIsActive) {
 	} else {
 		$social_right_content .= '<div class=actions>';
 		if (api_get_setting('allow_social_tool') == 'true' && api_get_setting('allow_message_tool') == 'true') {
@@ -329,7 +330,7 @@ if (!isset($_POST['compose'])) {
     } elseif(isset($_GET['send_to_user'])) {
         $social_right_content .= show_compose_to_user($_GET['send_to_user']);
     } else {
-        $social_right_content .= show_compose_to_any($_user['user_id']);
+        $social_right_content .= show_compose_to_any(api_get_user_id());
     }
 } else {
     $restrict = false;
diff --git a/main/messages/view_message.php b/main/messages/view_message.php
index dfe34606c0..31525cb19d 100755
--- a/main/messages/view_message.php
+++ b/main/messages/view_message.php
@@ -75,7 +75,6 @@ $tpl = new Template(get_lang('View'));
 SocialManager::setSocialUserBlock($tpl, $user_id, $show_menu);
 
 if (api_get_setting('allow_social_tool') == 'true') {
-    $tpl->assign('social_avatar_block', $social_avatar_block);
     $tpl->assign('social_menu_block', $social_menu_block);
     $tpl->assign('social_right_content', $social_right_content);
     $social_layout = $tpl->get_template('social/inbox.tpl');
diff --git a/main/social/profile.php b/main/social/profile.php
index 32738acbf5..d5d020fa30 100755
--- a/main/social/profile.php
+++ b/main/social/profile.php
@@ -236,7 +236,7 @@ foreach ($sessionList as $session) {
 }
 
 // My friends
-$friend_html = listMyFriends($user_id, $link_shared ,$show_full_profile);
+$friend_html = SocialManager::listMyFriends($user_id, $link_shared ,$show_full_profile);
 $social_left_content = '<div class="well sidebar-nav">' .$friend_html . '</div>';
 
 /*
@@ -281,11 +281,11 @@ if ($show_full_profile) {
 */
 //Social Block Wall
 
-$wallSocialAddPost = wallSocialAddPost();
+$wallSocialAddPost = SocialManager::getWallForm();
 $social_wall_block = $wallSocialAddPost;
 
 //Social Post Wall
-$post_wall = wallSocialPost($my_user_id,$friendId) ;
+$post_wall = SocialManager::getWallMessagesByUser($my_user_id, $friendId) ;
 $social_post_wall_block  = '<div class="panel panel-default social-post">';
 $social_post_wall_block .= '<div class="panel-heading">Mis publicaciones</div>';
 $social_post_wall_block .='<div class="panel-body">';
@@ -749,99 +749,3 @@ $tpl->assign('formModals', $formModals);
 $social_layout = $tpl->get_template('social/profile.tpl');
 $tpl->display($social_layout);
 
-/*
-* function list my friends
-*/
-function listMyFriends($user_id, $link_shared, $show_full_profile)
-{
-    //SOCIALGOODFRIEND , USER_RELATION_TYPE_FRIEND, USER_RELATION_TYPE_PARENT
-    $friends = SocialManager::get_friends($user_id, USER_RELATION_TYPE_FRIEND);
-
-    $friendHtml = '';
-    $number_of_images = 30;
-    $number_friends = 0;
-    $number_friends = count($friends);
-
-    $friendHtml = '<div class="nav-list"><h3>'.get_lang('SocialFriend').'<span>(' . $number_friends . ')</span></h3></div>';
-
-    if ($number_friends != 0) {
-        if ($number_friends > $number_of_images) {
-            if (api_get_user_id() == $user_id) {
-                $friendHtml.= ' : <span><a href="friends.php">'.get_lang('SeeAll').'</a></span>';
-            } else {
-                $friendHtml.= ' : <span>'
-                    .'<a href="'.api_get_path(WEB_CODE_PATH).'social/profile_friends_and_groups.inc.php'
-                    .'?view=friends&height=390&width=610&user_id='.$user_id.'"'
-                    .'class="ajax" title="'.get_lang('SeeAll').'" >'.get_lang('SeeAll').'</a></span>';
-            }
-        }
-
-        $friendHtml.= '<ul class="nav nav-list">';
-        $j = 1;
-        for ($k=0; $k < $number_friends; $k++) {
-            if ($j > $number_of_images) break;
-
-            if (isset($friends[$k])) {
-                $friend = $friends[$k];
-                $name_user    = api_get_person_name($friend['firstName'], $friend['lastName']);
-                $user_info_friend = api_get_user_info($friend['friend_user_id'], true);
-
-                if ($user_info_friend['user_is_online']) {
-                    $statusIcon = Display::span('', array('class' => 'online_user_in_text'));
-                } else {
-                    $statusIcon = Display::span('', array('class' => 'offline_user_in_text'));
-                }
-
-                $friendHtml.= '<li class="">';
-                // the height = 92 must be the sqme in the image_friend_network span style in default.css
-                $friends_profile = SocialManager::get_picture_user($friend['friend_user_id'], $friend['image'], 20, USER_IMAGE_SIZE_SMALL);
-                $friendHtml.= '<img src="'.$friends_profile['file'].'" id="imgfriend_'.$friend['friend_user_id'].'" title="'.$name_user.'"/>';
-                $link_shared = (empty($link_shared)) ? '' : '&'.$link_shared;
-                $friendHtml.= $statusIcon .'<a href="profile.php?' .'u=' . $friend['friend_user_id'] . $link_shared . '">' . $name_user .'</a>';
-                $friendHtml.= '</li>';
-            }
-            $j++;
-        }
-        $friendHtml.='</ul>';
-    } else {
-        $friendHtml.= '<div class="">'.get_lang('NoFriendsInYourContactList').'<br />'
-            .'<a class="btn" href="'.api_get_path(WEB_PATH).'whoisonline.php">'. get_lang('TryAndFindSomeFriends').'</a></div>';
-    }
-
-    return $friendHtml;
-}
-
-
-function wallSocialAddPost()
-{
-    $html  = '<div class="panel panel-default social-wall">';
-    $html .= '<div class="panel-heading">' . get_lang('SocialWall') . '</div>';
-    $html .= '<div class="panel-body">';
-    $html .=
-        '<form name="social_wall_main" method="POST" enctype="multipart/form-data">
-            <label for="social_wall_new_msg_main" class="hide">' . get_lang('SocialWallWhatAreYouThinkingAbout') . '</label>
-        <textarea name="social_wall_new_msg_main" rows="2" cols="80" style="width: 98%" placeholder="'.get_lang('SocialWallWhatAreYouThinkingAbout').'"></textarea>
-        <br />
-        <input class="" name="picture" type="file" accept="image/*" style="width:80%;">
-        <button type="submit" name="social_wall_new_msg_main_submit"  class="pull-right btn btn-success" />
-        <i class="fa fa-pencil"></i> '.get_lang('Post').'</button>
-    </form>';
-    $html.= '</div></div>';
-
-    return $html;
-}
-
-function wallSocialPost($userId, $friendId)
-{
-    $array = SocialManager::getWallMessagesPostHTML($userId, $friendId);
-    $html = '';
-
-    for($i = 0; $i < count($array); $i++) {
-        $post = $array[$i]['html'];
-        $comment = SocialManager::getWallMessagesHTML($userId, $friendId, $array[$i]['id']);
-
-        $html .= $post.$comment;
-    }
-
-    return $html;
-}
diff --git a/main/survey/survey.lib.php b/main/survey/survey.lib.php
index 53f3cfd102..19e005e901 100755
--- a/main/survey/survey.lib.php
+++ b/main/survey/survey.lib.php
@@ -3405,7 +3405,7 @@ class SurveyUtil
 
         foreach ($groupList as $groupId) {
             $userGroupList = GroupManager::getStudents($groupId);
-            $userGroupIdList = api_array_column($userGroupList, 'user_id');
+            $userGroupIdList = array_column($userGroupList, 'user_id');
             $users_array = array_merge($users_array, $userGroupIdList);
 
             $params = array(