diff --git a/main/gradebook/lib/fe/displaygradebook.php b/main/gradebook/lib/fe/displaygradebook.php
index 9f28bb6daf..1b5399a1aa 100755
--- a/main/gradebook/lib/fe/displaygradebook.php
+++ b/main/gradebook/lib/fe/displaygradebook.php
@@ -475,7 +475,7 @@ class DisplayGradebook
                             $my_api_cidreq.'&origin=gradebook&selectcat='.$catobj->get_id().'">'.
                             Display::return_icon('certificate.png', get_lang('AttachCertificate'), '', ICON_SIZE_MEDIUM).'</a>';
                     }
-                    
+
                     if (empty($categories)) {
                         $actionsRight .= '<a href="gradebook_edit_all.php?id_session='.api_get_session_id().'&'.$my_api_cidreq.'&selectcat='.$catobj->get_id().'">'.
                             Display::return_icon('percentage.png', get_lang('EditAllWeights'), '', ICON_SIZE_MEDIUM).'</a>';
diff --git a/plugin/customcertificate/resources/css/certificate.css b/plugin/customcertificate/resources/css/certificate.css
index cfeebe27dc..7e8a0f3103 100644
--- a/plugin/customcertificate/resources/css/certificate.css
+++ b/plugin/customcertificate/resources/css/certificate.css
@@ -1,7 +1,7 @@
 body {background-repeat:no-repeat; margin:0; padding: 0;}
 td { font-family:arial, sans-serif; font-size:18px; }
-.logo { height: 150px; vertical-align: middle; }
-.content-table { height: 480px; padding: 10px 25px; vertical-align:middle;}
+.logo {height: 150px; vertical-align: middle; }
+.content-table {height: 480px;  vertical-align:middle;}
 .content-student { text-align:center;}
 .course { padding-top: 10px; text-align:center; vertical-align: middle;}
 .modality { text-align:center; }
@@ -13,5 +13,5 @@ td { font-family:arial, sans-serif; font-size:18px; }
 .caraA {box-decoration-break: slice; page: caraA}
 @page caraB { background:#FFFFFF; }
 .caraB {box-decoration-break: slice; page: caraB}
-.contents-learnpath td {background: #FFFFFF; font-size: 12px; height: 160mm; padding: 10px; vertical-align: top;}
+.contents-learnpath td {background: #FFFFFF; font-size: 12px; height: 160mm; vertical-align: top;}
 ol {margin: 0; padding:0;}
diff --git a/plugin/customcertificate/resources/js/certificate.js b/plugin/customcertificate/resources/js/certificate.js
index f2a422f129..0721fade19 100644
--- a/plugin/customcertificate/resources/js/certificate.js
+++ b/plugin/customcertificate/resources/js/certificate.js
@@ -27,7 +27,7 @@ function typeDateExpedictionSwitchRadioButton(){
     var inputType = document.getElementsByName("type_date_expediction");
     var type;
     for (var i=0;i<inputType.length;i++){
-        if ( inputType[i].checked == true) {
+        if ( inputType[i].checked === true) {
             type = parseInt(inputType[i].value);
         }
     }
@@ -49,7 +49,7 @@ function contentsTypeSwitchRadioButton(){
     var inputType = document.getElementsByName("contents_type");
     var type;
     for (var i=0;i<inputType.length;i++){
-        if ( inputType[i].checked ) {
+        if ( inputType[i].checked === true) {
           type = parseInt(inputType[i].value);
         }
     }
diff --git a/plugin/customcertificate/src/CustomCertificatePlugin.php b/plugin/customcertificate/src/CustomCertificatePlugin.php
index 75c26f64dc..e71d9db098 100644
--- a/plugin/customcertificate/src/CustomCertificatePlugin.php
+++ b/plugin/customcertificate/src/CustomCertificatePlugin.php
@@ -24,7 +24,7 @@ class CustomCertificatePlugin extends Plugin
                     'type' => 'checkbox',
             ],
     ];
-    
+
     protected function __construct()
     {
         parent::__construct(
@@ -198,7 +198,7 @@ class CustomCertificatePlugin extends Plugin
             echo get_lang('MessageUpdate');
         }
     }
-    
+
     /**
      * Get certificate data.
      *
@@ -233,7 +233,7 @@ class CustomCertificatePlugin extends Plugin
                 ];
             }
         }
-        
+
         return [];
     }
 }
diff --git a/plugin/customcertificate/src/index.php b/plugin/customcertificate/src/index.php
index f65db161ed..f4815a9b33 100644
--- a/plugin/customcertificate/src/index.php
+++ b/plugin/customcertificate/src/index.php
@@ -1176,16 +1176,16 @@ function uploadImageCertificate(
     if (empty($certId)) {
         return false;
     }
-    
+
     $delete = empty($file);
-    
+
     if (empty($sourceFile)) {
         $sourceFile = $file;
     }
 
     $base = api_get_path(SYS_UPLOAD_PATH);
     $path = $base.'certificates/'.$certId.'/';
-    
+
     if ($default) {
         $path = $base.'certificates/default/';
     }
@@ -1194,17 +1194,17 @@ function uploadImageCertificate(
     if (!file_exists($path)) {
         mkdir($path, api_get_permissions_for_new_directories(), true);
     }
-    
+
     // Exit if only deletion has been requested. Return an empty picture name.
     if ($delete) {
         return '';
     }
-    
+
     $allowedTypes = api_get_supported_image_extensions();
     $file = str_replace('\\', '/', $file);
     $filename = (($pos = strrpos($file, '/')) !== false) ? substr($file, $pos + 1) : $file;
     $extension = strtolower(substr(strrchr($filename, '.'), 1));
-    
+
     if (!in_array($extension, $allowedTypes)) {
         return false;
     }
diff --git a/plugin/customcertificate/src/print_certificate.php b/plugin/customcertificate/src/print_certificate.php
index 47dc51ee33..8db8f9e40c 100644
--- a/plugin/customcertificate/src/print_certificate.php
+++ b/plugin/customcertificate/src/print_certificate.php
@@ -6,7 +6,7 @@ use Chamilo\CourseBundle\Entity\CLpCategory;
 if (intval($_GET['default']) == 1) {
     $cidReset = true;
 }
-
+    
 $course_plugin = 'customcertificate';
 require_once __DIR__.'/../config.php';
 
@@ -105,14 +105,14 @@ if (empty($infoCertificate)) {
 $workSpace = intval(297 - $infoCertificate['margin_left'] - $infoCertificate['margin_right']);
 $widthCell = intval($workSpace / 6);
 $htmlText = '';
-$htmlText .= '<link rel="stylesheet"
-                    type="text/css"
-                    href="'.api_get_path(WEB_PLUGIN_PATH).'customcertificate/resources/css/certificate.css"
-                >';
-$htmlText .= '<link rel="stylesheet"
-                    type="text/css"
-                    href="'.api_get_path(WEB_CSS_PATH).'editor.css"
-                >';
+$htmlText .= '
+    <link rel="stylesheet"
+        type="text/css"
+        href="'.api_get_path(WEB_PLUGIN_PATH).'customcertificate/resources/css/certificate.css">';
+$htmlText .= '
+    <link rel="stylesheet"
+        type="text/css"
+        href="'.api_get_path(WEB_CSS_PATH).'editor.css">';
 $htmlText .= '<body>';
 foreach ($userList as $userInfo) {
     $studentId = $userInfo['user_id'];
@@ -121,48 +121,47 @@ foreach ($userList as $userInfo) {
         $htmlText .= '<div class="caraA" style="padding:0; page-break-before:always;" margin:0; padding:0;>';
     } else {
         $urlBackground = $path.$infoCertificate['background'];
-        $htmlText .= '<div class="caraA"
-                        style="background-image:url('.$urlBackground.') no-repeat; background-image-resize:6;"
-                        margin:0;
-                        padding:0;
-                      >';
+        $htmlText .= '
+            <div class="caraA"
+                style="background-image:url('.$urlBackground.') no-repeat; background-image-resize:6;"
+                margin:0;
+                padding:0;>';
     }
 
     if (!empty($infoCertificate['logo_left'])) {
-        $logoLeft = '<img 
-                        style="max-height: 150px; max-width: '.(2 * $widthCell).'mm;"
-                        src="'.$path.$infoCertificate['logo_left'].'"
-                     />';
+        $logoLeft = '
+            <img 
+                style="max-height: 150px; max-width: '.(2 * $widthCell).'mm;"
+                src="'.$path.$infoCertificate['logo_left'].'" />';
     } else {
         $logoLeft = '';
     }
 
     if (!empty($infoCertificate['logo_center'])) {
-        $logoCenter = '<img 
-                        style="max-height: 150px; max-width: '.intval($workSpace - (2 * $widthCell)).'mm;"
-                        src="'.$path.$infoCertificate['logo_center'].'"
-                        />';
+        $logoCenter = '
+            <img 
+                style="max-height: 150px; max-width: '.intval($workSpace - (2 * $widthCell)).'mm;"
+                src="'.$path.$infoCertificate['logo_center'].'" />';
     } else {
         $logoCenter = '';
     }
 
     if (!empty($infoCertificate['logo_right'])) {
-        $logoRight = '<img
-                        style="max-height: 150px; max-width: '.(2 * $widthCell).'mm;"
-                        src="'.$path.$infoCertificate['logo_right'].'"
-                        />';
+        $logoRight = '
+            <img
+                style="max-height: 150px; max-width: '.(2 * $widthCell).'mm;"
+                src="'.$path.$infoCertificate['logo_right'].'" />';
     } else {
         $logoRight = '';
     }
 
     $htmlText .= '<table 
-                    width="'.$workSpace.'mm"
-                    style="
-                        margin-left:'.$infoCertificate['margin_left'].'mm;
-                        margin-right:'.$infoCertificate['margin_right'].'mm;
-                    "
-                    border="0"
-                    >';
+        width="'.$workSpace.'mm"
+        style="
+            margin-left:'.$infoCertificate['margin_left'].'mm;
+            margin-right:'.$infoCertificate['margin_right'].'mm;
+        "
+        border="0">';
     $htmlText .= '<tr>';
     $htmlText .= '<td colspan="4" class="logo">'.$logoLeft.'</td>';
     $htmlText .= '<td colspan="4" class="logo" style="text-align:center;">'.$logoCenter.'</td>';
@@ -268,57 +267,52 @@ foreach ($userList as $userInfo) {
     $htmlText .= '</tr>';
 
     $htmlText .= '<tr>';
-    $htmlText .= '<td colspan="2" class="seals" style="width:'.$widthCell.'mm">
-                '.((!empty($infoCertificate['signature_text1'])) ? $infoCertificate['signature_text1'] : '').
+    $htmlText .= '<td colspan="2" class="seals" style="width:'.$widthCell.'mm">'.
+                ((!empty($infoCertificate['signature_text1'])) ? $infoCertificate['signature_text1'] : '').
                 '</td>
-                <td colspan="2" class="seals" style="width:'.$widthCell.'mm">
-                    '.((!empty($infoCertificate['signature_text2'])) ? $infoCertificate['signature_text2'] : '').
+                <td colspan="2" class="seals" style="width:'.$widthCell.'mm">'.
+                ((!empty($infoCertificate['signature_text2'])) ? $infoCertificate['signature_text2'] : '').
                 '</td>
-                <td colspan="2" class="seals" style="width:'.$widthCell.'mm">
-                    '.((!empty($infoCertificate['signature_text3'])) ? $infoCertificate['signature_text3'] : '').
+                <td colspan="2" class="seals" style="width:'.$widthCell.'mm">'.
+                ((!empty($infoCertificate['signature_text3'])) ? $infoCertificate['signature_text3'] : '').
                 '</td>
-                <td colspan="2" class="seals" style="width:'.$widthCell.'mm">
-                    '.((!empty($infoCertificate['signature_text4'])) ? $infoCertificate['signature_text4'] : '').
+                <td colspan="2" class="seals" style="width:'.$widthCell.'mm">'.
+                ((!empty($infoCertificate['signature_text4'])) ? $infoCertificate['signature_text4'] : '').
                 '</td>
                 <td colspan="4" class="seals" style="width:'.(2 * $widthCell).'mm">
                     '.((!empty($infoCertificate['seal'])) ? $plugin->get_lang('Seal') : '').
                 '</td>';
     $htmlText .= '</tr>';
     $htmlText .= '<tr>';
-    $htmlText .= '<td colspan="2" class="logo-seals" style="width:'.$widthCell.'mm">
-                    '.((!empty($infoCertificate['signature1']))
-                    ? '<img style="max-height: 100px; max-width: '.$widthCell.'mm;"
-                        src="'.$path.$infoCertificate['signature1'].'"
-                        />'
-                    : '').
+    $htmlText .= '<td colspan="2" class="logo-seals" style="width:'.$widthCell.'mm">'.
+                ((!empty($infoCertificate['signature1']))
+                ? '<img style="max-height: 100px; max-width: '.$widthCell.'mm;"
+                    src="'.$path.$infoCertificate['signature1'].'" />'
+                : '').
                 '</td>
-                <td colspan="2" class="logo-seals" style="width:'.$widthCell.'mm">
-                    '.((!empty($infoCertificate['signature2']))
-                    ? '<img style="max-height: 100px; '.$widthCell.'mm;"
-                            src="'.$path.$infoCertificate['signature2'].'"
-                        />'
-                    : '').
+                <td colspan="2" class="logo-seals" style="width:'.$widthCell.'mm">'.
+                ((!empty($infoCertificate['signature2']))
+                ? '<img style="max-height: 100px; '.$widthCell.'mm;"
+                    src="'.$path.$infoCertificate['signature2'].'" />'
+                : '').
                 '</td>
-                <td colspan="2" class="logo-seals" style="width:'.$widthCell.'mm">
-                    '.((!empty($infoCertificate['signature3']))
-                    ? '<img style="max-height: 100px; '.$widthCell.'mm;"
-                            src="'.$path.$infoCertificate['signature3'].'"
-                        />'
-                    : '').
+                <td colspan="2" class="logo-seals" style="width:'.$widthCell.'mm">'.
+                ((!empty($infoCertificate['signature3']))
+                ? '<img style="max-height: 100px; '.$widthCell.'mm;"
+                    src="'.$path.$infoCertificate['signature3'].'" />'
+                : '').
                 '</td>
-                <td colspan="2" class="logo-seals" style="width:'.$widthCell.'mm">
-                    '.((!empty($infoCertificate['signature4']))
-                    ? '<img style="max-height: 100px; '.$widthCell.'mm;"
-                            src="'.$path.$infoCertificate['signature4'].'"
-                        />'
-                    : '').
+                <td colspan="2" class="logo-seals" style="width:'.$widthCell.'mm">'.
+                ((!empty($infoCertificate['signature4']))
+                ? '<img style="max-height: 100px; '.$widthCell.'mm;"
+                    src="'.$path.$infoCertificate['signature4'].'" />'
+                : '').
                 '</td>
-                <td colspan="4" class="logo-seals" style="width:'.(2 * $widthCell).'mm">
-                    '.((!empty($infoCertificate['seal']))
-                    ? '<img style="max-height: 100px; '.(2 * $widthCell).'mm;"
-                            src="'.$path.$infoCertificate['seal'].'"
-                        />'
-                    : '').
+                <td colspan="4" class="logo-seals" style="width:'.(2 * $widthCell).'mm">'.
+                ((!empty($infoCertificate['seal']))
+                ? '<img style="max-height: 100px; '.(2 * $widthCell).'mm;"
+                    src="'.$path.$infoCertificate['seal'].'" />'
+                : '').
                 '</td>';
     $htmlText .= '</tr>';
     $htmlText .= '</table>';
@@ -329,12 +323,10 @@ foreach ($userList as $userInfo) {
 
     if ($infoCertificate['contents_type'] == 0) {
         $contentsDescription = CourseDescription::get_data_by_description_type(3, $courseId, 0);
-
         $domd = new DOMDocument();
         libxml_use_internal_errors(true);
         $domd->loadHTML($contentsDescription['description_content']);
         libxml_use_internal_errors(false);
-
         $domx = new DOMXPath($domd);
         $items = $domx->query("//li[@style]");
         foreach ($items as $item) {
@@ -347,7 +339,6 @@ foreach ($userList as $userInfo) {
         }
 
         $output = $domd->saveHTML();
-
         $htmlText .= getIndexFiltered($output);
     }
 
@@ -358,9 +349,8 @@ foreach ($userList as $userInfo) {
         $categoryTest->setId(0);
         $categoryTest->setName($plugin->get_lang('WithOutCategory'));
         $categoryTest->setPosition(0);
-        $categories = [
-            $categoryTest
-        ];
+        $categories = [$categoryTest];
+
         if (!empty($categoriesTempList)) {
             $categories = array_merge($categories, $categoriesTempList);
         }