diff --git a/plugin/sepe/src/configuration.php b/plugin/sepe/src/configuration.php
index dc8b4353b9..baa289e574 100644
--- a/plugin/sepe/src/configuration.php
+++ b/plugin/sepe/src/configuration.php
@@ -1,12 +1,12 @@
 <?php
 /* For licensing terms, see /license.txt */
 
+use \ChamiloSession as Session;
+
 /**
  * This script displays setting api key user.
  */
 
-use \ChamiloSession as Session;
-
 require_once '../config.php';
 
 $course_plugin = 'sepe';
@@ -22,7 +22,6 @@ if (api_is_platform_admin()) {
     if (Database::num_rows($result) > 0) {
         $tmp = Database::fetch_assoc($result);
         $info = $tmp['api'];
-        
     } else {
         $info = '';
     }
diff --git a/plugin/sepe/src/formative-action-edit.php b/plugin/sepe/src/formative-action-edit.php
index f5c265e762..6595dcf1e6 100644
--- a/plugin/sepe/src/formative-action-edit.php
+++ b/plugin/sepe/src/formative-action-edit.php
@@ -1,10 +1,11 @@
 <?php
 /* For licensing terms, see /license.txt */
 
+use \ChamiloSession as Session;
+
 /**
  *    This script displays a formative action edit form.
  */
-use \ChamiloSession as Session;
 require_once '../config.php';
 
 $course_plugin = 'sepe';
@@ -163,7 +164,7 @@ if (api_is_platform_admin()) {
         $templateName = $plugin->get_lang('formativeActionEdit');
         $tpl = new Template($templateName);
         $tpl->assign('info', $info);
-        if ($info['start_date'] != "0000-00-00" && $info['start_date'] != NULL) {
+        if ($info['start_date'] != "0000-00-00" && $info['start_date'] != null) {
             $tpl->assign('day_start', date("j", strtotime($info['start_date'])));
             $tpl->assign('month_start', date("n", strtotime($info['start_date'])));
             $tpl->assign('year_start', date("Y", strtotime($info['start_date'])));
@@ -173,7 +174,7 @@ if (api_is_platform_admin()) {
         } else {
             $yearStart = date("Y");
         }
-        if ($info['end_date'] != "0000-00-00" && $info['end_date'] != NULL) {
+        if ($info['end_date'] != "0000-00-00" && $info['end_date'] != null) {
             $tpl->assign('day_end', date("j", strtotime($info['end_date'])));
             $tpl->assign('month_end', date("n", strtotime($info['end_date'])));
             $tpl->assign('year_end', date("Y", strtotime($info['end_date'])));
diff --git a/plugin/sepe/src/formative-action.php b/plugin/sepe/src/formative-action.php
index 171afa45f7..dcdb095c31 100644
--- a/plugin/sepe/src/formative-action.php
+++ b/plugin/sepe/src/formative-action.php
@@ -1,12 +1,12 @@
 <?php
 /* For licensing terms, see /license.txt */
 
+use \ChamiloSession as Session;
+
 /**
  * This script displays a basic info of formative action.
  */
 
-use \ChamiloSession as Session;
-
 require_once '../config.php';
 
 $course_plugin = 'sepe';
@@ -17,19 +17,19 @@ if (api_is_platform_admin()) {
     $actionId = getActionId(intval($_GET['cid']));
     $info = getActionInfo($actionId);
     if ($info === false) {
-        header("Location: formative-actions-list.php");    
+        header("Location: formative-actions-list.php");
     }
     $templateName = $plugin->get_lang('FormativeActionData');
     $interbreadcrumb[] = array("url" => "/plugin/sepe/src/sepe-administration-menu.php", "name" => $plugin->get_lang('MenuSepe'));
     $interbreadcrumb[] = array("url" => "formative-actions-list.php", "name" => $plugin->get_lang('FormativesActionsList'));
     $tpl = new Template($templateName);
-    
+
     if (isset($_SESSION['sepe_message_info'])) {
-        $tpl->assign('message_info', $_SESSION['sepe_message_info']);    
+        $tpl->assign('message_info', $_SESSION['sepe_message_info']);
         unset($_SESSION['sepe_message_info']);
     }
     if (isset($_SESSION['sepe_message_error'])) {
-        $tpl->assign('message_error', $_SESSION['sepe_message_error']);    
+        $tpl->assign('message_error', $_SESSION['sepe_message_error']);
         unset($_SESSION['sepe_message_error']);
     }
     
diff --git a/plugin/sepe/src/formative-actions-list.php b/plugin/sepe/src/formative-actions-list.php
index d5aa893b25..2868a96ce0 100644
--- a/plugin/sepe/src/formative-actions-list.php
+++ b/plugin/sepe/src/formative-actions-list.php
@@ -1,11 +1,11 @@
 <?php
 /* For licensing terms, see /license.txt */
 
+use \ChamiloSession as Session;
+
 /**
  *    This script displays a formatives actions list.
  */
-
-use \ChamiloSession as Session;
 require_once '../config.php';
 
 $plugin = SepePlugin::create();
@@ -14,13 +14,13 @@ if (api_is_platform_admin()) {
     $templateName = $plugin->get_lang('FormativesActionsList');
     $interbreadcrumb[] = array("url" => "/plugin/sepe/src/sepe-administration-menu.php", "name" => $plugin->get_lang('MenuSepe'));
     $tpl = new Template($templateName);
-    
+
     if (isset($_SESSION['sepe_message_info'])) {
-        $tpl->assign('message_info', $_SESSION['sepe_message_info']);    
+        $tpl->assign('message_info', $_SESSION['sepe_message_info']);
         unset($_SESSION['sepe_message_info']);
     }
     if (isset($_SESSION['sepe_message_error'])) {
-        $tpl->assign('message_error', $_SESSION['sepe_message_error']);    
+        $tpl->assign('message_error', $_SESSION['sepe_message_error']);
         unset($_SESSION['sepe_message_error']);
     }
     $courseActionList = listCourseAction();
diff --git a/plugin/sepe/src/identification-data-edit.php b/plugin/sepe/src/identification-data-edit.php
index 54aa2f9f0b..cfcc75858e 100644
--- a/plugin/sepe/src/identification-data-edit.php
+++ b/plugin/sepe/src/identification-data-edit.php
@@ -1,10 +1,11 @@
 <?php
 /* For licensing terms, see /license.txt */
 
+use \ChamiloSession as Session;
+
 /**
  * This script displays a data center edit form.
  */
-use \ChamiloSession as Session;
 
 require_once '../config.php';
 $plugin = SepePlugin::create();
@@ -30,7 +31,7 @@ if (!empty($_POST)) {
                         tracking_url = '".$trackingUrl."', 
                         phone = '".$phone."', 
                         mail = '".$mail."' 
-                    WHERE id = $id";    
+                    WHERE id = $id";
         } else {
             $sql = "INSERT INTO $tableSepeCenter (
                         id, 
diff --git a/plugin/sepe/src/identification-data.php b/plugin/sepe/src/identification-data.php
index 5f918c4233..195517c257 100644
--- a/plugin/sepe/src/identification-data.php
+++ b/plugin/sepe/src/identification-data.php
@@ -1,12 +1,12 @@
 <?php
 /* For licensing terms, see /license.txt */
 
+use \ChamiloSession as Session;
+
 /**
  * This script displays a basic info about data center.
  */
 
-use \ChamiloSession as Session;
-
 require_once '../config.php';
 
 $plugin = SepePlugin::create();
diff --git a/plugin/sepe/src/index.sepe.php b/plugin/sepe/src/index.sepe.php
index 1d2df8b6cf..189a45d227 100644
--- a/plugin/sepe/src/index.sepe.php
+++ b/plugin/sepe/src/index.sepe.php
@@ -1,5 +1,6 @@
 <?php
 /* For license terms, see /license.txt */
+
 /**
  * Index of the Sepe plugin
  */
diff --git a/plugin/sepe/src/participant-action-edit.php b/plugin/sepe/src/participant-action-edit.php
index 2912ff47ee..c0677c73bc 100644
--- a/plugin/sepe/src/participant-action-edit.php
+++ b/plugin/sepe/src/participant-action-edit.php
@@ -1,11 +1,12 @@
 <?php
 /* For licensing terms, see /license.txt */
 
+use \ChamiloSession as Session;
+
 /**
  *    This script displays a participant edit form.
  */
 
-use \ChamiloSession as Session;
 require_once '../config.php';
 
 $course_plugin = 'sepe';
@@ -15,8 +16,8 @@ $_cid = 0;
 if (!empty($_POST)) {
     $check = Security::check_token('post');
     if ($check) {
-        $companyTutorId = (!empty($_POST['company_tutor_id']) ? intval($_POST['company_tutor_id']) : NULL);
-        $trainingTutorId = (!empty($_POST['training_tutor_id']) ? intval($_POST['training_tutor_id']) : NULL);
+        $companyTutorId = (!empty($_POST['company_tutor_id']) ? intval($_POST['company_tutor_id']) : null);
+        $trainingTutorId = (!empty($_POST['training_tutor_id']) ? intval($_POST['training_tutor_id']) : null);
         $tutorCompanyDocumentType = Database::escape_string(trim($_POST['tutor_company_document_type']));
         $tutorCompanyDocumentNumber = Database::escape_string(trim($_POST['tutor_company_document_number']));
         $tutorCompanyDocumentLetter = Database::escape_string(trim($_POST['tutor_company_document_letter']));
@@ -158,6 +159,7 @@ if (!empty($_POST)) {
         }
         session_write_close();
         header("Location: participant-action-edit.php?new_participant=0&participant_id=".$participantId."&action_id=".$actionId);
+        exit;
     } else {
         $participantId = intval($_POST['participant_id']);
         $actionId = intval($_POST['action_id']);
@@ -167,6 +169,7 @@ if (!empty($_POST)) {
         $_SESSION['sepe_message_error'] = $plugin->get_lang('ProblemToken');
         session_write_close();
         header("Location: participant-action-edit.php?new_participant=".$newParticipant."&participant_id=".$participantId."&action_id=".$actionId);
+        exit;
     }
 } else {
     $token = Security::get_token();
diff --git a/plugin/sepe/src/participant-specialty-edit.php b/plugin/sepe/src/participant-specialty-edit.php
index a54b932d3c..d0432ada78 100644
--- a/plugin/sepe/src/participant-specialty-edit.php
+++ b/plugin/sepe/src/participant-specialty-edit.php
@@ -1,11 +1,12 @@
 <?php
 /* For licensing terms, see /license.txt */
 
+use \ChamiloSession as Session;
+
 /**
  *    This script displays a participant specialty edit form.
  */
 
-use \ChamiloSession as Session;
 require_once '../config.php';
 
 $course_plugin = 'sepe';
@@ -141,6 +142,7 @@ if (!empty($_POST)) {
         }
         session_write_close();
         header("Location: participant-specialty-edit.php?new_specialty=0&specialty_id=".$specialtyId."&participant_id=".$participantId."&action_id=".$actionId);
+        exit;
     } else {
         $newSpecialty = intval($_POST['new_specialty']);
         $participantId = intval($_POST['participant_id']);
@@ -151,6 +153,7 @@ if (!empty($_POST)) {
         $_SESSION['sepe_message_error'] = $plugin->get_lang('ProblemToken');
         session_write_close();
         header("Location: participant-specialty-edit.php?new_specialty=".$newSpecialty."&specialty_id=".$specialtyId."&participant_id=".$participantId."&action_id=".$actionId);
+        exit;
     }
 } else {
     $token = Security::get_token();
@@ -182,7 +185,7 @@ if (api_is_platform_admin()) {
         $info = getInfoSpecialtyParticipant(intval($_GET['specialty_id']));
         $tpl->assign('info', $info);
         $tpl->assign('new_specialty', '0');
-        if ($info['registration_date'] != '0000-00-00' && $info['registration_date'] != NULL) {
+        if ($info['registration_date'] != '0000-00-00' && $info['registration_date'] != null) {
             $tpl->assign('day_registration', date("j", strtotime($info['registration_date'])));
             $tpl->assign('month_registration', date("n", strtotime($info['registration_date'])));
             $tpl->assign('year_registration', date("Y", strtotime($info['registration_date'])));
@@ -192,7 +195,7 @@ if (api_is_platform_admin()) {
         } else {
             $registrationYear = date("Y");
         }
-        if ($info['leaving_date'] != '0000-00-00' && $info['leaving_date'] != NULL) {
+        if ($info['leaving_date'] != '0000-00-00' && $info['leaving_date'] != null) {
             $tpl->assign('day_leaving', date("j", strtotime($info['leaving_date'])));
             $tpl->assign('month_leaving', date("n", strtotime($info['leaving_date'])));
             $tpl->assign('year_leaving', date("Y", strtotime($info['leaving_date'])));
@@ -202,7 +205,7 @@ if (api_is_platform_admin()) {
         } else {
             $leaveYear = date("Y");
         }
-        if ($info['start_date'] != '0000-00-00' && $info['start_date'] != NULL) {
+        if ($info['start_date'] != '0000-00-00' && $info['start_date'] != null) {
             $tpl->assign('day_start', date("j", strtotime($info['start_date'])));
             $tpl->assign('month_start', date("n", strtotime($info['start_date'])));
             $tpl->assign('year_start', date("Y", strtotime($info['start_date'])));
@@ -212,7 +215,7 @@ if (api_is_platform_admin()) {
         } else {
             $startYear = date("Y");
         }
-        if ($info['end_date'] != '0000-00-00' && $info['end_date'] != NULL) {
+        if ($info['end_date'] != '0000-00-00' && $info['end_date'] != null) {
             $tpl->assign('day_end', date("j", strtotime($info['end_date'])));
             $tpl->assign('month_end', date("n", strtotime($info['end_date'])));
             $tpl->assign('year_end', date("Y", strtotime($info['end_date'])));
diff --git a/plugin/sepe/src/sepe-administration-menu.php b/plugin/sepe/src/sepe-administration-menu.php
index 8520d4165a..5253c472ac 100644
--- a/plugin/sepe/src/sepe-administration-menu.php
+++ b/plugin/sepe/src/sepe-administration-menu.php
@@ -1,12 +1,12 @@
 <?php
 /* For licensing terms, see /license.txt */
 
+use \ChamiloSession as Session;
+
 /**
  *    This script displays a administrator menu.
  */
 
-use \ChamiloSession as Session;
-
 require_once '../config.php';
 
 $plugin = SepePlugin::create();
diff --git a/plugin/sepe/src/sepe.lib.php b/plugin/sepe/src/sepe.lib.php
index 6687ca58cd..4f8eb72b58 100644
--- a/plugin/sepe/src/sepe.lib.php
+++ b/plugin/sepe/src/sepe.lib.php
@@ -78,7 +78,7 @@ function getCourseCode($actionId)
 {
     global $tableCourse;
     $courseId = getCourse($actionId);
-    $sql = "SELECT code FROM $tableCourse WHERE id = $courseId";    
+    $sql = "SELECT code FROM $tableCourse WHERE id = $courseId";
     $rs = Database::query($sql);
     $aux = Database::fetch_assoc($rs);
     return $aux['code'];
@@ -186,7 +186,7 @@ function getCentersList()
 function listTutorType($condition)
 {
     global $tableTutorCompany;
-       $sql = "SELECT * FROM $tableTutorCompany WHERE ".$condition." ORDER BY alias ASC, document_number ASC;";
+    $sql = "SELECT * FROM $tableTutorCompany WHERE ".$condition." ORDER BY alias ASC, document_number ASC;";
     $res = Database::query($sql);
     $aux = array();
     while ($row = Database::fetch_assoc($res)) {
@@ -195,7 +195,7 @@ function listTutorType($condition)
         if (trim($row['alias']) != '') {
             $tmp['alias'] = $row['alias'].' - '.$row['document_type'].' '.$row['document_number'].' '.$row['document_letter'];    
         } else {
-            $tmp['alias'] = $row['document_type'].' '.$row['document_number'].' '.$row['document_letter'];    
+            $tmp['alias'] = $row['document_type'].' '.$row['document_number'].' '.$row['document_letter'];
         }
         $aux[] = $tmp;
     }
@@ -224,7 +224,7 @@ function getTutorsSpecialty($specialtyId)
             if (trim($row['firstname']) != '' || trim($row['lastname']) != '') {
                 $tutor['data'] = $row['firstname'].' '.$row['lastname'].' ('.$row['document_type'].' '.$row['document_number'].' '.$row['document_letter'].' )';    
             } else {
-                $tutor['data'] = $row['document_type'].' '.$row['document_number'].' '.$row['document_letter'];    
+                $tutor['data'] = $row['document_type'].' '.$row['document_number'].' '.$row['document_letter'];
             }
             $aux[] = $tutor;
         }
diff --git a/plugin/sepe/src/sepe_plugin.class.php b/plugin/sepe/src/sepe_plugin.class.php
index a1cfe7516f..e854ad7626 100644
--- a/plugin/sepe/src/sepe_plugin.class.php
+++ b/plugin/sepe/src/sepe_plugin.class.php
@@ -1,5 +1,6 @@
 <?php
 /* For license terms, see /license.txt */
+
 /**
  * Plugin class for the SEPE plugin
  * @package chamilo.plugin.sepe
@@ -24,7 +25,7 @@ class SepePlugin extends Plugin
     const TABLE_SEPE_LOG_PARTICIPANT = 'plugin_sepe_log_participant';
     const TABLE_SEPE_LOG_MOD_PARTICIPANT = 'plugin_sepe_log_mod_participant';
     const TABLE_SEPE_LOG = 'plugin_sepe_log';
-    
+
     public $isAdminPlugin = true;
 
     /**
@@ -47,7 +48,7 @@ class SepePlugin extends Plugin
             array('sepe_enable' => 'boolean')
         );
     }
-    
+
     /**
      * This method creates the tables required to this plugin
      */
@@ -82,7 +83,7 @@ class SepePlugin extends Plugin
 
         require_once api_get_path(SYS_PLUGIN_PATH).'sepe/database.php';
     }
-        
+
     /**
      * This method drops the plugin tables
      */
@@ -128,7 +129,7 @@ class SepePlugin extends Plugin
                    . $oldTableTutorsCompany." TO ".self::TABLE_SEPE_TUTORS_COMPANY.", "
                    . $oldTableCompetence." TO ".self::TABLE_SEPE_TEACHING_COMPETENCE.";";
         Database::query($sql);
-        
+
         $sepeCourseActionsTable = self::TABLE_SEPE_COURSE_ACTIONS;
         $sql = "ALTER TABLE ".$sepeCourseActionsTable." CHANGE `cod` `id` INT( 10 ) UNSIGNED NOT NULL AUTO_INCREMENT";
         Database::query($sql);
@@ -136,7 +137,7 @@ class SepePlugin extends Plugin
         Database::query($sql);
         $sql = "ALTER TABLE ".$sepeCourseActionsTable." CHANGE `id_course` `course_id` INT( 10 ) UNSIGNED NOT NULL";
         Database::query($sql);
-        
+
         $sepeActionsTable = self::TABLE_SEPE_ACTIONS;
         $sql = "ALTER TABLE ".$sepeActionsTable." CHANGE `cod` `id` INT( 10 ) UNSIGNED NOT NULL AUTO_INCREMENT";
         Database::query($sql);
@@ -174,7 +175,7 @@ class SepePlugin extends Plugin
         Database::query($sql);
         $sql = "ALTER TABLE ".$sepeActionsTable." CHANGE `CONTACTO_ACCION` `contact_action` LONGTEXT";
         Database::query($sql);
-                
+
         $sepeSpecialtyTable = self::TABLE_SEPE_SPECIALTY;
         $sql = "ALTER TABLE ".$sepeSpecialtyTable." CHANGE `cod` `id` INT( 10 ) UNSIGNED NOT NULL AUTO_INCREMENT";
         Database::query($sql);
@@ -226,7 +227,7 @@ class SepePlugin extends Plugin
         Database::query($sql);
         $sql = "ALTER TABLE ".$sepeSpecialtyTable." CHANGE `NUMERO_ACTIVIDADES_EVALUACION` `evaluation_activity_count` INT( 10 ) UNSIGNED";
         Database::query($sql);
-        
+
         $sepeParticipantTable = self::TABLE_SEPE_PARTICIPANTS;
         $sql = "ALTER TABLE ".$sepeParticipantTable." CHANGE `cod` `id` INT( 10 ) UNSIGNED NOT NULL AUTO_INCREMENT";
         Database::query($sql);
@@ -250,7 +251,7 @@ class SepePlugin extends Plugin
         Database::query($sql);
         $sql = "ALTER TABLE ".$sepeParticipantTable." CHANGE `CIF_EMPRESA` `company_fiscal_number` VARCHAR( 9 )";
         Database::query($sql);
-        
+
         $sepeCenterTable = self::TABLE_SEPE_CENTERS;
         $sql = "ALTER TABLE ".$sepeCenterTable." CHANGE `cod` `id` INT( 10 ) UNSIGNED NOT NULL AUTO_INCREMENT";
         Database::query($sql);
@@ -258,7 +259,7 @@ class SepePlugin extends Plugin
         Database::query($sql);
         $sql = "ALTER TABLE ".$sepeCenterTable." CHANGE `CODIGO_CENTRO` `center_code` VARCHAR(16)";
         Database::query($sql);
-        
+
         $sepeSpecialtyClassroomTable = self::TABLE_SEPE_SPECIALTY_CLASSROOM;
         $sql = "ALTER TABLE ".$sepeSpecialtyClassroomTable." CHANGE `cod` `id` INT( 10 ) UNSIGNED NOT NULL AUTO_INCREMENT";
         Database::query($sql);
@@ -266,7 +267,7 @@ class SepePlugin extends Plugin
         Database::query($sql);
         $sql = "ALTER TABLE ".$sepeSpecialtyClassroomTable." CHANGE `cod_centro` `center_id` INT( 10 ) UNSIGNED NOT NULL";
         Database::query($sql);
-        
+
         $sepeSpecialtyTutorsTable = self::TABLE_SEPE_SPECIALTY_TUTORS;
         $sql = "ALTER TABLE ".$sepeSpecialtyTutorsTable." CHANGE `cod` `id` INT( 10 ) UNSIGNED NOT NULL AUTO_INCREMENT";
         Database::query($sql);
@@ -284,7 +285,7 @@ class SepePlugin extends Plugin
         Database::query($sql);
         $sql = "ALTER TABLE ".$sepeSpecialtyTutorsTable." CHANGE `FORMACION_MODALIDAD_TELEFORMACION` `training_teleforming` VARCHAR(2)";
         Database::query($sql);
-        
+
         $sepeTutorsTable = self::TABLE_SEPE_TUTORS;
         $sql = "ALTER TABLE ".$sepeTutorsTable." CHANGE `cod` `id` INT( 10 ) UNSIGNED NOT NULL AUTO_INCREMENT";
         Database::query($sql);
@@ -306,7 +307,7 @@ class SepePlugin extends Plugin
         Database::query($sql);
         $sql = "ALTER TABLE ".$sepeTutorsTable." CHANGE `FORMACION_MODALIDAD_TELEFORMACION` `training_teleforming` VARCHAR(2)";
         Database::query($sql);
-        
+
         $sepeParticipantSpecialtyTable = self::TABLE_SEPE_PARTICIPANTS_SPECIALTY;
         $sql = "ALTER TABLE ".$sepeParticipantSpecialtyTable." CHANGE `cod` `id` INT( 10 ) UNSIGNED NOT NULL AUTO_INCREMENT";
         Database::query($sql);
@@ -336,7 +337,7 @@ class SepePlugin extends Plugin
         Database::query($sql);
         $sql = "ALTER TABLE ".$sepeParticipantSpecialtyTable." CHANGE `PUNTUACION_FINAL` `final_score` VARCHAR(4)";
         Database::query($sql);
-        
+
         $sepeParticipantSpecialtyTutorialsTable = self::TABLE_SEPE_PARTICIPANTS_SPECIALTY_TUTORIALS;
         $sql = "ALTER TABLE ".$sepeParticipantSpecialtyTutorialsTable." CHANGE `cod` `id` INT( 10 ) UNSIGNED NOT NULL AUTO_INCREMENT";
         Database::query($sql);
@@ -350,9 +351,9 @@ class SepePlugin extends Plugin
         Database::query($sql);
         $sql = "ALTER TABLE ".$sepeParticipantSpecialtyTutorialsTable." CHANGE `FECHA_FIN` `end_date` DATE";
         Database::query($sql);
-        
+
         $sepeTutorsCompanyTable = self::TABLE_SEPE_TUTORS_COMPANY;
-        
+
         $sql = "UPDATE ".$sepeTutorsCompanyTable." SET empresa='1' WHERE empresa='SI'";
         Database::query($sql);
         $sql = "UPDATE ".$sepeTutorsCompanyTable." SET empresa='0' WHERE empresa='NO'";
@@ -361,7 +362,7 @@ class SepePlugin extends Plugin
         Database::query($sql);
         $sql = "UPDATE ".$sepeTutorsCompanyTable." SET formacion='0' WHERE formacion='NO'";
         Database::query($sql);
-        
+
         $sql = "ALTER TABLE ".$sepeTutorsCompanyTable." CHANGE `cod` `id` INT( 10 ) UNSIGNED NOT NULL AUTO_INCREMENT";
         Database::query($sql);
         $sql = "ALTER TABLE ".$sepeTutorsCompanyTable." CHANGE `alias` `alias` VARCHAR(255)";
@@ -376,13 +377,13 @@ class SepePlugin extends Plugin
         Database::query($sql);
         $sql = "ALTER TABLE ".$sepeTutorsCompanyTable." CHANGE `formacion` `training` VARCHAR(1)";
         Database::query($sql);
-                
+
         $sepeCompetenceTable = self::TABLE_SEPE_TEACHING_COMPETENCE;
         $sql = "ALTER TABLE ".$sepeCompetenceTable." CHANGE `cod` `id` INT( 10 ) UNSIGNED NOT NULL AUTO_INCREMENT";
         Database::query($sql);
         $sql = "ALTER TABLE ".$sepeCompetenceTable." CHANGE `valor` `value` LONGTEXT";
         Database::query($sql);
-                
+
         $sepeLogParticipantTable = self::TABLE_SEPE_LOG_PARTICIPANT;
         $sql = "ALTER TABLE ".$sepeLogParticipantTable." CHANGE `cod` `id` INT( 10 ) UNSIGNED NOT NULL AUTO_INCREMENT";
         Database::query($sql);
@@ -394,7 +395,7 @@ class SepePlugin extends Plugin
         Database::query($sql);
         $sql = "ALTER TABLE ".$sepeLogParticipantTable." CHANGE `fecha_baja` `leaving_date` DATE";
         Database::query($sql);
-        
+
         $sepeLogModParticipantTable = self::TABLE_SEPE_LOG_MOD_PARTICIPANT;
         $sql = "ALTER TABLE ".$sepeLogModParticipantTable." CHANGE `cod` `id` INT( 10 ) UNSIGNED NOT NULL AUTO_INCREMENT";
         Database::query($sql);
@@ -404,7 +405,7 @@ class SepePlugin extends Plugin
         Database::query($sql);
         $sql = "ALTER TABLE ".$sepeLogModParticipantTable." CHANGE `fecha_mod` `change_date` DATE";
         Database::query($sql);
-        
+
         $sepeCenterTable = self::TABLE_SEPE_CENTER;
         $sql = "ALTER TABLE ".$sepeCenterTable." CHANGE `cod` `id` INT( 10 ) UNSIGNED NOT NULL AUTO_INCREMENT";
         Database::query($sql);
diff --git a/plugin/sepe/src/specialty-action-edit.php b/plugin/sepe/src/specialty-action-edit.php
index f8c4469c82..6e6779bc68 100644
--- a/plugin/sepe/src/specialty-action-edit.php
+++ b/plugin/sepe/src/specialty-action-edit.php
@@ -1,11 +1,12 @@
 <?php
 /* For licensing terms, see /license.txt */
 
+use \ChamiloSession as Session;
+
 /**
  *    This script displays a specialty action edit form.
  */
 
-use \ChamiloSession as Session;
 require_once '../config.php';
 
 $course_plugin = 'sepe';
@@ -155,9 +156,18 @@ if (!empty($_POST)) {
 
 if (api_is_platform_admin()) {
     $id_course = getCourse(intval($_GET['action_id']));
-    $interbreadcrumb[] = array("url" => "/plugin/sepe/src/sepe-administration-menu.php", "name" => $plugin->get_lang('MenuSepe'));
-    $interbreadcrumb[] = array("url" => "formative-actions-list.php", "name" => $plugin->get_lang('FormativesActionsList'));
-    $interbreadcrumb[] = array("url" => "formative-action.php?cid=".$id_course, "name" => $plugin->get_lang('FormativeAction'));
+    $interbreadcrumb[] = array(
+        "url" => "/plugin/sepe/src/sepe-administration-menu.php",
+        "name" => $plugin->get_lang('MenuSepe'),
+    );
+    $interbreadcrumb[] = array(
+        "url" => "formative-actions-list.php",
+        "name" => $plugin->get_lang('FormativesActionsList'),
+    );
+    $interbreadcrumb[] = array(
+        "url" => "formative-action.php?cid=".$id_course,
+        "name" => $plugin->get_lang('FormativeAction'),
+    );
     if (isset($_GET['new_specialty']) && intval($_GET['new_specialty']) == 1) {
         $templateName = $plugin->get_lang('NewSpecialtyAccion');
         $tpl = new Template($templateName);
@@ -172,7 +182,7 @@ if (api_is_platform_admin()) {
         $tpl->assign('action_id', intval($_GET['action_id']));
         $info = getSpecialtActionInfo(intval($_GET['specialty_id']));
         $tpl->assign('info', $info);
-        if ($info['start_date'] != '0000-00-00' && $info['start_date'] != NULL) {
+        if ($info['start_date'] != '0000-00-00' && $info['start_date'] != null) {
             $tpl->assign('day_start', date("j", strtotime($info['start_date'])));
             $tpl->assign('month_start', date("n", strtotime($info['start_date'])));
             $tpl->assign('year_start', date("Y", strtotime($info['start_date'])));
@@ -182,7 +192,7 @@ if (api_is_platform_admin()) {
         } else {
             $yearStart = date("Y");
         }
-        if ($info['end_date'] != '0000-00-00' && $info['end_date'] != NULL) {
+        if ($info['end_date'] != '0000-00-00' && $info['end_date'] != null) {
             $tpl->assign('day_end', date("j", strtotime($info['end_date'])));
             $tpl->assign('month_end', date("n", strtotime($info['end_date'])));
             $tpl->assign('year_end', date("Y", strtotime($info['end_date'])));
diff --git a/plugin/sepe/src/specialty-classroom-edit.php b/plugin/sepe/src/specialty-classroom-edit.php
index d173ce45f7..0e3ca2f866 100644
--- a/plugin/sepe/src/specialty-classroom-edit.php
+++ b/plugin/sepe/src/specialty-classroom-edit.php
@@ -1,11 +1,11 @@
 <?php
 /* For licensing terms, see /license.txt */
 
+use \ChamiloSession as Session;
+
 /**
  *    This script displays a specialty classroom edit form.
  */
-
-use \ChamiloSession as Session;
 require_once '../config.php';
 
 $course_plugin = 'sepe';
@@ -69,6 +69,7 @@ if (!empty($_POST)) {
         }
         session_write_close();
         header("Location: specialty-action-edit.php?new_specialty=0&specialty_id=".$specialtyId."&action_id=".$actionId);
+        exit;
     } else {
         $newClassroom = intval($_POST['new_classroom']);
         $actionId = intval($_POST['action_id']);
@@ -79,6 +80,7 @@ if (!empty($_POST)) {
         $token = Security::get_token();
         session_write_close();
         header("Location:specialty-classroom-edit.php?new_classroom=".$newClassroom."&specialty_id=".$specialtyId."&classroom_id=".$classroomId."&action_id=".$actionId);
+        exit;
     }
 } else {
     $token = Security::get_token();
diff --git a/plugin/sepe/src/specialty-tutor-edit.php b/plugin/sepe/src/specialty-tutor-edit.php
index 52312f15ca..440e851f26 100644
--- a/plugin/sepe/src/specialty-tutor-edit.php
+++ b/plugin/sepe/src/specialty-tutor-edit.php
@@ -1,11 +1,12 @@
 <?php
 /* For licensing terms, see /license.txt */
 
+use \ChamiloSession as Session;
+
 /**
  *    This script displays a specialty tutors edit form.
  */
 
-use \ChamiloSession as Session;
 require_once '../config.php';
 
 $course_plugin = 'sepe';
@@ -153,6 +154,7 @@ if (!empty($_POST)) {
         }
         session_write_close();
         header("Location: specialty-action-edit.php?new_specialty=0&specialty_id=".$specialtyId."&action_id=".$actionId);
+        exit;
     } else {
         $actionId = intval($_POST['action_id']);
         $newTutor = intval($_POST['new_tutor']);
@@ -163,6 +165,7 @@ if (!empty($_POST)) {
         $_SESSION['sepe_message_error'] = $plugin->get_lang('ProblemToken');
         session_write_close();
         header("Location: specialty-tutor-edit.php?new_tutor=".$newTutor."&specialty_id=".$specialtyId."&tutor_id=".$specialtyTutorId."&action_id=".$actionId);
+        exit;
     }
 } else {
     $token = Security::get_token();
@@ -217,4 +220,5 @@ if (api_is_platform_admin()) {
     $tpl->display_one_col_template();
 } else {
     header('Location:'.api_get_path(WEB_PATH));
+    exit;
 }
diff --git a/plugin/sepe/src/specialty-tutorial-edit.php b/plugin/sepe/src/specialty-tutorial-edit.php
index 22533239c6..30ddf36ccc 100644
--- a/plugin/sepe/src/specialty-tutorial-edit.php
+++ b/plugin/sepe/src/specialty-tutorial-edit.php
@@ -1,11 +1,12 @@
 <?php
 /* For licensing terms, see /license.txt */
 
+use \ChamiloSession as Session;
+
 /**
  *    This script displays a specialty tutorial edit form.
  */
 
-use \ChamiloSession as Session;
 require_once '../config.php';
 
 $course_plugin = 'sepe';
@@ -62,6 +63,7 @@ if (!empty($_POST)) {
         session_write_close();
         $participantId = getParticipantId($specialtyId);
         header("Location: participant-specialty-edit.php?new_specialty=0&participant_id=".$participantId."&specialty_id=".$specialtyId."&action_id=".$actionId);
+        exit;
     } else {
         $tutorialId = intval($_POST['tutorial_id']);
         $actionId = intval($_POST['action_id']);
@@ -72,6 +74,7 @@ if (!empty($_POST)) {
         $_SESSION['sepe_message_error'] = $plugin->get_lang('ProblemToken');
         session_write_close();
         header("Location: specialty-tutorial-edit.php?new_tutorial=".$newTutorial."&specialty_id=".$specialtyId."&tutorial_id=".$tutorialId."&action_id=".$actionId);
+        exit;
     }
 } else {
     $token = Security::get_token();
@@ -102,7 +105,7 @@ if (api_is_platform_admin()) {
         $info = getInfoSpecialtyTutorial(intval($_GET['tutorial_id']));
         $tpl->assign('info', $info);
         $tpl->assign('new_tutorial', '0');
-        if ($info['start_date'] != '0000-00-00' && $info['start_date'] != NULL) {
+        if ($info['start_date'] != '0000-00-00' && $info['start_date'] != null) {
             $tpl->assign('day_start', date("j", strtotime($info['start_date'])));
             $tpl->assign('month_start', date("n", strtotime($info['start_date'])));
             $tpl->assign('year_start', date("Y", strtotime($info['start_date'])));
@@ -112,7 +115,7 @@ if (api_is_platform_admin()) {
         } else {
             $startYear = date("Y");
         }
-        if ($info['end_date'] != '0000-00-00' && $info['end_date'] != NULL) {
+        if ($info['end_date'] != '0000-00-00' && $info['end_date'] != null) {
             $tpl->assign('day_end', date("j", strtotime($info['end_date'])));
             $tpl->assign('month_end', date("n", strtotime($info['end_date'])));
             $tpl->assign('year_end', date("Y", strtotime($info['end_date'])));
@@ -154,4 +157,5 @@ if (api_is_platform_admin()) {
     $tpl->display_one_col_template();
 } else {
     header('Location:'.api_get_path(WEB_PATH));
+    exit;
 }