diff --git a/add_form.php b/add_form.php
index 9b2b7b1..4157c2f 100644
--- a/add_form.php
+++ b/add_form.php
@@ -242,6 +242,13 @@ class mod_attendance_add_form extends moodleform {
         return $errors;
     }
 
+    /**
+     * Check weekdays function.
+     * @param int $sessiondate
+     * @param int $sessionenddate
+     * @param int $sdays
+     * @return bool
+     */
     private function checkweekdays($sessiondate, $sessionenddate, $sdays) {
 
         $found = false;
diff --git a/classes/attendance_webservices_handler.php b/classes/attendance_webservices_handler.php
index 4809bb3..0b0d079 100644
--- a/classes/attendance_webservices_handler.php
+++ b/classes/attendance_webservices_handler.php
@@ -13,6 +13,7 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
 /**
  * Web Services for Attendance plugin.
  *
@@ -28,10 +29,17 @@ require_once(dirname(__FILE__).'/structure.php');
 require_once(dirname(__FILE__).'/../../../lib/sessionlib.php');
 require_once(dirname(__FILE__).'/../../../lib/datalib.php');
 
+/**
+ * Class attendance_handler
+ * @copyright  2015 Caio Bressan Doneda
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
 class attendance_handler {
     /**
      * For this user, this method searches in all the courses that this user has permission to take attendance,
      * looking for today sessions and returns the courses with the sessions.
+     * @param int $userid
+     * @return array
      */
     public static function get_courses_with_today_sessions($userid) {
         $usercourses = enrol_get_users_courses($userid);
@@ -69,6 +77,12 @@ class attendance_handler {
         return self::prepare_data($coursessessions);
     }
 
+    /**
+     * Prepare data.
+     *
+     * @param array $coursessessions
+     * @return array
+     */
     private static function prepare_data($coursessessions) {
         $courses = array();
 
@@ -82,8 +96,11 @@ class attendance_handler {
         return $courses;
     }
 
-    /*
-     ** For this session, returns all the necessary data to take an attendance
+    /**
+     * For this session, returns all the necessary data to take an attendance.
+     *
+     * @param int $sessionid
+     * @return mixed
      */
     public static function get_session($sessionid) {
         global $DB;
@@ -103,6 +120,15 @@ class attendance_handler {
         return $session;
     }
 
+    /**
+     * Update user status
+     *
+     * @param int $sessionid
+     * @param int $studentid
+     * @param int $takenbyid
+     * @param int $statusid
+     * @param int $statusset
+     */
     public static function update_user_status($sessionid, $studentid, $takenbyid, $statusid, $statusset) {
         global $DB;
 
diff --git a/classes/calendar_helpers.php b/classes/calendar_helpers.php
index b6fd53f..723264c 100644
--- a/classes/calendar_helpers.php
+++ b/classes/calendar_helpers.php
@@ -64,7 +64,7 @@ function attendance_create_calendar_event(&$session) {
 /**
  * Create multiple calendar events based on sessions data.
  *
- * @param array %sessionsids array of sessions ids
+ * @param array $sessionsids array of sessions ids
  */
 function attendance_create_calendar_events($sessionsids) {
     global $DB;
@@ -81,9 +81,9 @@ function attendance_create_calendar_events($sessionsids) {
 /**
  * Update calendar event duration and date
  *
- * @param $caleventid int calendar event id
- * @param $timeduration int duration of the event
- * @param $timestart int start time of the event
+ * @param int $caleventid calendar event id
+ * @param int $timeduration duration of the event
+ * @param int $timestart start time of the event
  * @return bool result of updating
  */
 function attendance_update_calendar_event($caleventid, $timeduration, $timestart) {
@@ -103,7 +103,7 @@ function attendance_update_calendar_event($caleventid, $timeduration, $timestart
 /**
  * Delete calendar events for sessions
  *
- * @param array %sessionsids array of sessions ids
+ * @param array $sessionsids array of sessions ids
  * @return bool result of updating
  */
 function attendance_delete_calendar_events($sessionsids) {
diff --git a/classes/manage_page_params.php b/classes/manage_page_params.php
index 93ba64d..48e5a54 100644
--- a/classes/manage_page_params.php
+++ b/classes/manage_page_params.php
@@ -30,10 +30,17 @@ defined('MOODLE_INTERNAL') || die();
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class mod_attendance_manage_page_params extends mod_attendance_page_with_filter_controls {
+    /**
+     * mod_attendance_manage_page_params constructor.
+     */
     public function  __construct() {
         $this->selectortype = mod_attendance_page_with_filter_controls::SELECTOR_SESS_TYPE;
     }
 
+    /**
+     * Get page params.
+     * @return array
+     */
     public function get_significant_params() {
         return array();
     }
diff --git a/classes/page_with_filter_controls.php b/classes/page_with_filter_controls.php
index e25d529..26a20b4 100644
--- a/classes/page_with_filter_controls.php
+++ b/classes/page_with_filter_controls.php
@@ -24,18 +24,28 @@
 defined('MOODLE_INTERNAL') || die();
 
 /**
- * base filter controls class - overridden by different views where needed.
+ * Base filter controls class - overridden by different views where needed.
  *
  * @copyright  2016 Dan Marsden http://danmarsden.com
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class mod_attendance_page_with_filter_controls {
+    /** No filter. */
     const SELECTOR_NONE         = 1;
+
+    /** Filter by group. */
     const SELECTOR_GROUP        = 2;
+
+    /** Filter by session type. */
     const SELECTOR_SESS_TYPE    = 3;
 
+    /** Common. */
     const SESSTYPE_COMMON       = 0;
+
+    /** All. */
     const SESSTYPE_ALL          = -1;
+
+    /** No value. */
     const SESSTYPE_NO_VALUE     = -2;
 
     /** @var int current view mode */
@@ -50,16 +60,26 @@ class mod_attendance_page_with_filter_controls {
     /** @var int end date of displayed date range */
     public $enddate;
 
+    /** @var int type. */
     public $selectortype        = self::SELECTOR_NONE;
 
+    /** @var int default view. */
     protected $defaultview      = ATT_VIEW_WEEKS;
 
+    /** @var stdClass course module record. */
     private $cm;
 
+    /** @var array  */
     private $sessgroupslist;
 
+    /** @var int */
     private $sesstype;
 
+    /**
+     * initialise stuff.
+     *
+     * @param stdClass $cm
+     */
     public function init($cm) {
         $this->cm = $cm;
         $this->init_view();
@@ -67,6 +87,9 @@ class mod_attendance_page_with_filter_controls {
         $this->init_start_end_date();
     }
 
+    /**
+     * Initialise the view.
+     */
     private function init_view() {
         global $SESSION;
 
@@ -79,6 +102,9 @@ class mod_attendance_page_with_filter_controls {
         }
     }
 
+    /**
+     * Initialise the current date.
+     */
     private function init_curdate() {
         global $SESSION;
 
@@ -91,6 +117,9 @@ class mod_attendance_page_with_filter_controls {
         }
     }
 
+    /**
+     * Initialise the end date.
+     */
     public function init_start_end_date() {
         global $CFG;
 
@@ -132,6 +161,9 @@ class mod_attendance_page_with_filter_controls {
         }
     }
 
+    /**
+     * Calculate the session group list type.
+     */
     private function calc_sessgroupslist_sesstype() {
         global $SESSION;
 
@@ -180,6 +212,9 @@ class mod_attendance_page_with_filter_controls {
         }
     }
 
+    /**
+     * Calculate the session group list
+     */
     private function calc_sessgroupslist() {
         global $USER, $PAGE;
 
@@ -207,6 +242,11 @@ class mod_attendance_page_with_filter_controls {
         }
     }
 
+    /**
+     * Return the session groups.
+     *
+     * @return array
+     */
     public function get_sess_groups_list() {
         if (is_null($this->sessgroupslist)) {
             $this->calc_sessgroupslist_sesstype();
@@ -215,6 +255,11 @@ class mod_attendance_page_with_filter_controls {
         return $this->sessgroupslist;
     }
 
+    /**
+     * Get the current session type.
+     *
+     * @return int
+     */
     public function get_current_sesstype() {
         if (is_null($this->sesstype)) {
             $this->calc_sessgroupslist_sesstype();
@@ -223,6 +268,11 @@ class mod_attendance_page_with_filter_controls {
         return $this->sesstype;
     }
 
+    /**
+     * Set the current session type.
+     *
+     * @param int $sesstype
+     */
     public function set_current_sesstype($sesstype) {
         $this->sesstype = $sesstype;
     }
diff --git a/classes/preferences_page_params.php b/classes/preferences_page_params.php
index 9437b4c..9be3a29 100644
--- a/classes/preferences_page_params.php
+++ b/classes/preferences_page_params.php
@@ -30,19 +30,31 @@ defined('MOODLE_INTERNAL') || die();
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class mod_attendance_preferences_page_params {
+    /** Add */
     const ACTION_ADD              = 1;
+    /** Delete */
     const ACTION_DELETE           = 2;
+    /** Hide */
     const ACTION_HIDE             = 3;
+    /** Show */
     const ACTION_SHOW             = 4;
+    /** Save */
     const ACTION_SAVE             = 5;
 
     /** @var int view mode of taking attendance page*/
     public $action;
 
+    /** @var int */
     public $statusid;
 
+    /** @var array */
     public $statusset;
 
+    /**
+     * Get params for this page.
+     *
+     * @return array
+     */
     public function get_significant_params() {
         $params = array();
 
diff --git a/classes/report_page_params.php b/classes/report_page_params.php
index 9a7c2d6..a0d995c 100644
--- a/classes/report_page_params.php
+++ b/classes/report_page_params.php
@@ -30,15 +30,27 @@ defined('MOODLE_INTERNAL') || die();
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class mod_attendance_report_page_params extends mod_attendance_page_with_filter_controls {
+    /** @var int */
     public $group;
+    /** @var int */
     public $sort;
+    /** @var int */
     public $showsessiondetails;
+    /** @var int */
     public $sessiondetailspos;
 
+    /**
+     * mod_attendance_report_page_params constructor.
+     */
     public function  __construct() {
         $this->selectortype = self::SELECTOR_GROUP;
     }
 
+    /**
+     * Initialise params.
+     *
+     * @param stdClass $cm
+     */
     public function init($cm) {
         parent::init($cm);
 
@@ -50,6 +62,10 @@ class mod_attendance_report_page_params extends mod_attendance_page_with_filter_
         }
     }
 
+    /**
+     * Get params for this page.
+     * @return array
+     */
     public function get_significant_params() {
         $params = array();
 
diff --git a/classes/structure.php b/classes/structure.php
index 3506217..8efdf29 100644
--- a/classes/structure.php
+++ b/classes/structure.php
@@ -32,7 +32,9 @@ require_once(dirname(__FILE__) . '/calendar_helpers.php');
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class mod_attendance_structure {
+    /** Common sessions */
     const SESSION_COMMON        = 0;
+    /** Group sessions */
     const SESSION_GROUP         = 1;
 
     /** @var stdclass course module record */
@@ -62,23 +64,27 @@ class mod_attendance_structure {
     /** @var int format of the intro (see above) */
     public $introformat;
 
-    /** current page parameters */
+    /** @var array current page parameters */
     public $pageparams;
 
+    /** @var string subnets (IP range) for student self selection. */
     public $subnet;
 
-    /** Define if session details should be shown in reports */
+    /** @var int Define if session details should be shown in reports */
     public $showsessiondetails;
 
-    /** Position for the session detail columns related to summary columns.*/
+    /** @var int Position for the session detail columns related to summary columns.*/
     public $sessiondetailspos;
 
+    /** @var int groupmode  */
     private $groupmode;
 
+    /** @var  array */
     private $statuses;
-    private $allstatuses; // Cache list of all statuses (not just one used by current session).
+    /** @var  array Cache list of all statuses (not just one used by current session). */
+    private $allstatuses;
 
-    // Array by sessionid.
+    /** @var array of sessionid. */
     private $sessioninfo = array();
 
     /**
@@ -91,8 +97,9 @@ class mod_attendance_structure {
      * @param stdClass $cm       Course module record as returned by {@link get_coursemodule_from_id()}
      * @param stdClass $course   Course record from {course} table
      * @param stdClass $context  The context of the workshop instance
+     * @param stdClass $pageparams
      */
-    public function __construct(stdclass $dbrecord, stdclass $cm, stdclass $course, stdclass $context=null, $pageparams=null) {
+    public function __construct(stdClass $dbrecord, stdClass $cm, stdClass $course, stdClass $context=null, $pageparams=null) {
         global $DB;
 
         foreach ($dbrecord as $field => $value) {
@@ -120,6 +127,11 @@ class mod_attendance_structure {
         }
     }
 
+    /**
+     * Get group mode.
+     *
+     * @return int
+     */
     public function get_group_mode() {
         if (is_null($this->groupmode)) {
             $this->groupmode = groups_get_activity_groupmode($this->cm, $this->course);
@@ -179,7 +191,7 @@ class mod_attendance_structure {
      * Returns today sessions suitable for copying attendance log
      *
      * Fetches data from {attendance_sessions}
-     *
+     * @param stdClass $sess
      * @return array of records or an empty array
      */
     public function get_today_sessions_for_copy($sess) {
@@ -237,6 +249,11 @@ class mod_attendance_structure {
         return $DB->get_records_select('attendance_sessions', $where, $params);
     }
 
+    /**
+     * Get filtered sessions.
+     *
+     * @return array
+     */
     public function get_filtered_sessions() {
         global $DB;
 
@@ -273,6 +290,8 @@ class mod_attendance_structure {
     }
 
     /**
+     * Get manage url.
+     * @param array $params
      * @return moodle_url of manage.php for attendance instance
      */
     public function url_manage($params=array()) {
@@ -281,6 +300,7 @@ class mod_attendance_structure {
     }
 
     /**
+     * Get manage temp users url.
      * @param array $params optional
      * @return moodle_url of tempusers.php for attendance instance
      */
@@ -290,6 +310,8 @@ class mod_attendance_structure {
     }
 
     /**
+     * Get temp delete url.
+     *
      * @param array $params optional
      * @return moodle_url of tempdelete.php for attendance instance
      */
@@ -299,6 +321,8 @@ class mod_attendance_structure {
     }
 
     /**
+     * Get temp edit url.
+     *
      * @param array $params optional
      * @return moodle_url of tempedit.php for attendance instance
      */
@@ -308,6 +332,8 @@ class mod_attendance_structure {
     }
 
     /**
+     * Get temp merge url
+     *
      * @param array $params optional
      * @return moodle_url of tempedit.php for attendance instance
      */
@@ -317,6 +343,8 @@ class mod_attendance_structure {
     }
 
     /**
+     * Get url for sessions.
+     * @param array $params
      * @return moodle_url of sessions.php for attendance instance
      */
     public function url_sessions($params=array()) {
@@ -325,6 +353,8 @@ class mod_attendance_structure {
     }
 
     /**
+     * Get url for report.
+     * @param array $params
      * @return moodle_url of report.php for attendance instance
      */
     public function url_report($params=array()) {
@@ -333,6 +363,8 @@ class mod_attendance_structure {
     }
 
     /**
+     * Get url for export.
+     *
      * @return moodle_url of export.php for attendance instance
      */
     public function url_export() {
@@ -341,6 +373,8 @@ class mod_attendance_structure {
     }
 
     /**
+     * Get preferences url
+     * @param array $params
      * @return moodle_url of attsettings.php for attendance instance
      */
     public function url_preferences($params=array()) {
@@ -353,6 +387,8 @@ class mod_attendance_structure {
     }
 
     /**
+     * Get take url.
+     * @param array $params
      * @return moodle_url of attendances.php for attendance instance
      */
     public function url_take($params=array()) {
@@ -360,11 +396,21 @@ class mod_attendance_structure {
         return new moodle_url('/mod/attendance/take.php', $params);
     }
 
+    /**
+     * Get view url.
+     * @param array $params
+     * @return moodle_url
+     */
     public function url_view($params=array()) {
         $params = array_merge(array('id' => $this->cm->id), $params);
         return new moodle_url('/mod/attendance/view.php', $params);
     }
 
+    /**
+     * Add sessions.
+     *
+     * @param array $sessions
+     */
     public function add_sessions($sessions) {
         global $DB;
 
@@ -402,6 +448,12 @@ class mod_attendance_structure {
         }
     }
 
+    /**
+     * Update session from form.
+     *
+     * @param stdClass $formdata
+     * @param int $sessionid
+     */
     public function update_session_from_form_data($formdata, $sessionid) {
         global $DB;
 
@@ -449,7 +501,7 @@ class mod_attendance_structure {
     /**
      * Used to record attendance submitted by the student.
      *
-     * @param type $mformdata
+     * @param stdClass $mformdata
      * @return boolean
      */
     public function take_from_student($mformdata) {
@@ -506,6 +558,11 @@ class mod_attendance_structure {
         return true;
     }
 
+    /**
+     * Take attendance from form data.
+     *
+     * @param stdClass $formdata
+     */
     public function take_from_form_data($formdata) {
         global $DB, $USER;
         // TODO: WARNING - $formdata is unclean - comes from direct $_POST - ideally needs a rewrite but we do some cleaning below.
@@ -592,7 +649,11 @@ class mod_attendance_structure {
     }
 
     /**
-     * MDL-27591 made this method obsolete.
+     * Get users with enrolment status (Feature request MDL-27591)
+     *
+     * @param int $groupid
+     * @param int $page
+     * @return array
      */
     public function get_users($groupid = 0, $page = 1) {
         global $DB, $CFG;
@@ -687,7 +748,12 @@ class mod_attendance_structure {
         return $users;
     }
 
-    // Convert a tempuser record into a user object.
+    /**
+     * Convert a tempuser record into a user object.
+     *
+     * @param stdClass $tempuser
+     * @return object
+     */
     protected static function tempuser_to_user($tempuser) {
         $ret = (object)array(
             'id' => $tempuser->studentid,
@@ -708,6 +774,12 @@ class mod_attendance_structure {
         return $ret;
     }
 
+    /**
+     * Get user and include extra info.
+     *
+     * @param int $userid
+     * @return mixed|object
+     */
     public function get_user($userid) {
         global $DB;
 
@@ -749,6 +821,13 @@ class mod_attendance_structure {
         return $user;
     }
 
+    /**
+     * Get possible statuses.
+     *
+     * @param bool $onlyvisible
+     * @param bool $allsets
+     * @return array
+     */
     public function get_statuses($onlyvisible = true, $allsets = false) {
         if (!isset($this->statuses)) {
             // Get the statuses for the current set only.
@@ -770,6 +849,11 @@ class mod_attendance_structure {
         return $this->statuses;
     }
 
+    /**
+     * Get session info.
+     * @param int $sessionid
+     * @return mixed
+     */
     public function get_session_info($sessionid) {
         global $DB;
 
@@ -785,6 +869,12 @@ class mod_attendance_structure {
         return $this->sessioninfo[$sessionid];
     }
 
+    /**
+     * Get sessions info
+     *
+     * @param array $sessionids
+     * @return array
+     */
     public function get_sessions_info($sessionids) {
         global $DB;
 
@@ -803,16 +893,31 @@ class mod_attendance_structure {
         return $sessions;
     }
 
+    /**
+     * Get log.
+     *
+     * @param int $sessionid
+     * @return array
+     */
     public function get_session_log($sessionid) {
         global $DB;
 
         return $DB->get_records('attendance_log', array('sessionid' => $sessionid), '', 'studentid,statusid,remarks,id');
     }
 
+    /**
+     * Update user grade.
+     * @param array $userids
+     */
     public function update_users_grade($userids) {
         attendance_update_users_grade($this, $userids);
     }
 
+    /**
+     * Get filtered log.
+     * @param int $userid
+     * @return array
+     */
     public function get_user_filtered_sessions_log($userid) {
         global $DB;
 
@@ -857,6 +962,11 @@ class mod_attendance_structure {
         return $sessions;
     }
 
+    /**
+     * Get filtered log extended.
+     * @param int $userid
+     * @return array
+     */
     public function get_user_filtered_sessions_log_extended($userid) {
         global $DB;
         // All taked sessions (including previous groups).
@@ -937,6 +1047,10 @@ class mod_attendance_structure {
         return $sessions;
     }
 
+    /**
+     * Delete sessions.
+     * @param array $sessionsids
+     */
     public function delete_sessions($sessionsids) {
         global $DB;
         if (attendance_existing_calendar_events_ids($sessionsids)) {
@@ -954,6 +1068,12 @@ class mod_attendance_structure {
         $event->trigger();
     }
 
+    /**
+     * Update duration.
+     *
+     * @param array $sessionsids
+     * @param int $duration
+     */
     public function update_sessions_duration($sessionsids, $duration) {
         global $DB;
 
diff --git a/classes/take_page_params.php b/classes/take_page_params.php
index 3857d7e..38f29ec 100644
--- a/classes/take_page_params.php
+++ b/classes/take_page_params.php
@@ -13,7 +13,6 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
-defined('MOODLE_INTERNAL') || die();
 
 /**
  * Class definition for mod_attendance_take_page_params
@@ -23,6 +22,8 @@ defined('MOODLE_INTERNAL') || die();
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die();
+
 /**
  * contains functions/constants used by take attendance page.
  *
@@ -30,22 +31,34 @@ defined('MOODLE_INTERNAL') || die();
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class mod_attendance_take_page_params {
+    /** Sorted list. */
     const SORTED_LIST           = 1;
+    /** Sorted grid. */
     const SORTED_GRID           = 2;
 
+    /** Default view */
     const DEFAULT_VIEW_MODE     = self::SORTED_LIST;
 
+    /** @var int */
     public $sessionid;
+    /** @var int */
     public $grouptype;
+    /** @var int */
     public $group;
+    /** @var int */
     public $sort;
+    /** @var int */
     public $copyfrom;
 
     /** @var int view mode of taking attendance page*/
     public $viewmode;
 
+    /** @var int */
     public $gridcols;
 
+    /**
+     * Initialize params.
+     */
     public function init() {
         if (!isset($this->group)) {
             $this->group = 0;
@@ -57,6 +70,9 @@ class mod_attendance_take_page_params {
         $this->init_gridcols();
     }
 
+    /**
+     * Initialise view mode params.
+     */
     private function init_view_mode() {
         if (isset($this->viewmode)) {
             set_user_preference("attendance_take_view_mode", $this->viewmode);
@@ -65,6 +81,9 @@ class mod_attendance_take_page_params {
         }
     }
 
+    /**
+     * Initilise grid columns.
+     */
     private function init_gridcols() {
         if (isset($this->gridcols)) {
             set_user_preference("attendance_gridcolumns", $this->gridcols);
@@ -73,6 +92,10 @@ class mod_attendance_take_page_params {
         }
     }
 
+    /**
+     * Get main page params.
+     * @return array
+     */
     public function get_significant_params() {
         $params = array();
 
diff --git a/classes/view_page_params.php b/classes/view_page_params.php
index 93843ea..c0f98a7 100644
--- a/classes/view_page_params.php
+++ b/classes/view_page_params.php
@@ -13,7 +13,6 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
-defined('MOODLE_INTERNAL') || die();
 
 /**
  * Class definition for mod_attendance_view_page_params
@@ -23,6 +22,8 @@ defined('MOODLE_INTERNAL') || die();
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die();
+
 /**
  * contains functions/constants used by attendance view page.
  *
@@ -30,17 +31,30 @@ defined('MOODLE_INTERNAL') || die();
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class mod_attendance_view_page_params extends mod_attendance_page_with_filter_controls {
+    /** Only This course  */
     const MODE_THIS_COURSE  = 0;
+
+    /** All courses  */
     const MODE_ALL_COURSES  = 1;
 
+    /** @var int */
     public $studentid;
 
+    /** @var string */
     public $mode;
 
+    /**
+     * mod_attendance_view_page_params constructor.
+     */
     public function  __construct() {
         $this->defaultview = ATT_VIEW_MONTHS;
     }
 
+    /**
+     * Get params for url.
+     *
+     * @return array
+     */
     public function get_significant_params() {
         $params = array();
 
diff --git a/export_form.php b/export_form.php
index 053ae44..2a7b280 100644
--- a/export_form.php
+++ b/export_form.php
@@ -137,6 +137,12 @@ class mod_attendance_export_form extends moodleform {
         $mform->addElement('hidden', 'id', $cm->id);
     }
 
+    /**
+     * Validate form.
+     * @param array $data
+     * @param array $files
+     * @return array
+     */
     public function validation($data, $files) {
         $errors = parent::validation($data, $files);
 
diff --git a/temp_form.php b/temp_form.php
index 1572647..87b2a0b 100644
--- a/temp_form.php
+++ b/temp_form.php
@@ -27,9 +27,16 @@ defined('MOODLE_INTERNAL') || die();
 global $CFG;
 require_once($CFG->libdir.'/formslib.php');
 
+/**
+ * Class temp_form
+ * @copyright  2013 Davo Smith, Synergy Learning
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
 class temp_form extends moodleform {
+    /**
+     * Define form.
+     */
     public function definition() {
-
         $mform = $this->_form;
 
         $mform->addElement('hidden', 'id', 0);
@@ -49,11 +56,21 @@ class temp_form extends moodleform {
         $mform->closeHeaderBefore('submit');
     }
 
+    /**
+     * Do stuff to form after creation.
+     */
     public function definition_after_data() {
         $mform = $this->_form;
         $mform->applyFilter('tname', 'trim');
     }
 
+    /**
+     * Form validation.
+     *
+     * @param array $data
+     * @param array $files
+     * @return array
+     */
     public function validation($data, $files) {
         $errors = parent::validation($data, $files);
 
@@ -63,6 +80,4 @@ class temp_form extends moodleform {
 
         return $errors;
     }
-
 }
-
diff --git a/tempusers.php b/tempusers.php
index b15f50a..0faf1f1 100644
--- a/tempusers.php
+++ b/tempusers.php
@@ -89,12 +89,18 @@ $tempusers = $DB->get_records('attendance_tempusers', array('courseid' => $cours
 echo '<div>';
 echo '<p style="margin-left:10%;">'.get_string('tempuserslist', 'attendance').'</p>';
 if ($tempusers) {
-    print_tempusers($tempusers, $att);
+    attendance_print_tempusers($tempusers, $att);
 }
 echo '</div>';
 echo $output->footer($course);
 
-function print_tempusers($tempusers, mod_attendance_structure $att) {
+/**
+ * Print list of users.
+ *
+ * @param stdClass $tempusers
+ * @param mod_attendance_structure $att
+ */
+function attendance_print_tempusers($tempusers, mod_attendance_structure $att) {
     echo '<p></p>';
     echo '<table border="1" bordercolor="#EEEEEE" style="background-color:#fff" cellpadding="2" align="center"'.
           'width="80%" summary="'.get_string('temptable', 'attendance').'"><tr>';