diff --git a/plugin/test2pdf/database.php b/plugin/test2pdf/database.php
index 274af067c0..242c751d5a 100644
--- a/plugin/test2pdf/database.php
+++ b/plugin/test2pdf/database.php
@@ -24,4 +24,4 @@ $sql = "CREATE TABLE IF NOT EXISTS $table (
     enable INT(1)
     )";
 Database::query($sql);
-*/
\ No newline at end of file
+*/
diff --git a/plugin/test2pdf/install.php b/plugin/test2pdf/install.php
index cc1072c239..aa7790c5ef 100644
--- a/plugin/test2pdf/install.php
+++ b/plugin/test2pdf/install.php
@@ -10,6 +10,6 @@
  */
 require_once dirname(__FILE__) . '/config.php';
 if (!api_is_platform_admin()) {
-    die ('You must have admin permissions to install plugins');
+    die('You must have admin permissions to install plugins');
 }
 Test2pdfPlugin::create()->install();
diff --git a/plugin/test2pdf/lang/english.php b/plugin/test2pdf/lang/english.php
index 4f3a20b834..a89330c870 100644
--- a/plugin/test2pdf/lang/english.php
+++ b/plugin/test2pdf/lang/english.php
@@ -13,4 +13,3 @@ $strings['PluginDisabledFromAdminPanel'] = "The plugin has been disabled from th
 $strings['AnswersColumn'] = "Answers: ";
 $strings['Statement']= "Statement";
 $strings['PageX']= "Page %s";
-
diff --git a/plugin/test2pdf/plugin.php b/plugin/test2pdf/plugin.php
index 5c5704d993..4a862cb5c1 100644
--- a/plugin/test2pdf/plugin.php
+++ b/plugin/test2pdf/plugin.php
@@ -7,6 +7,6 @@
  */
 /**
  * Plugin details (must be present)
- */ 
+ */
 require_once dirname(__FILE__) . '/config.php';
 $plugin_info = Test2pdfPlugin::create()->get_info();
diff --git a/plugin/test2pdf/src/download-pdf.php b/plugin/test2pdf/src/download-pdf.php
index 1406e92ec1..47752a5e4b 100644
--- a/plugin/test2pdf/src/download-pdf.php
+++ b/plugin/test2pdf/src/download-pdf.php
@@ -13,8 +13,8 @@ require_once 'test2pdf_plugin.class.php';
  
 $test2pdfPlugin = Test2pdfPlugin::create();
 $enable = $test2pdfPlugin->get('enable_plugin');
-if($enable != "true"){
-	header('Location: ../../../index.php');
+if ($enable != "true") {
+    header('Location: ../../../index.php');
 }
 
 require('../class/fpdf.php');
@@ -26,214 +26,216 @@ $id_quiz	= (int) $_GET['id_quiz'];
 
 class PDF extends FPDF
 {
-	function Header()
-	{
-		global $title_course;
-		global $title_quiz;
+    public function Header()
+    {
+        global $title_course;
+        global $title_quiz;
 
-		$logo = '../resources/img/logo.png';
-		$this->Image($logo,10,0);
-	
-		// Title
-		$this->SetFont('Courier','I',14);
-		$this->Cell(0,5,$title_course,0,1,'R');
-		$this->SetFont('Helvetica','I',14);
-		$this->Cell(0,5,$title_quiz,0,1,'R');
-		
-		// Line break
-		$this->SetLineWidth(0.5);
-		$this->SetDrawColor(60,120,255);
-		$this->Line(10, 24, 200, 24);
-		$this->SetLineWidth(0.4);
-		$this->SetDrawColor(200);
-		$this->Line(11, 24.5, 199, 24.5);
-		$this->Ln(10);
-	}
-	
-	function Footer()
-	{
-	    global $test2pdfPlugin;
-		// Position at 1.5 cm from bottom
-		$this->SetY(-15);
-		$y = $this->GetY();
-		// Line break
-		$this->SetLineWidth(0.5);
-		$this->SetDrawColor(60,120,255);
-		$this->Line(10, $y, 200, $y);
-		$this->SetLineWidth(0.4);
-		$this->SetDrawColor(200);
-		$this->Line(11, $y+0.5, 199, $y+0.5);
-	
-		
-		// Arial italic 8
-		$this->SetFont('Arial','I',8);
-		// Text color in gray
-		$this->SetTextColor(128);
-		// Page number
-		$this->Cell(0,10,utf8_decode(sprintf($test2pdfPlugin->get_lang('PageX'), $this->PageNo())),0,0,'C');
-		$this->Cell(0,10,date('Y'),0,0,'R');
-	}
-	
-	var $B;
-	var $I;
-	var $U;
-	var $HREF;
-	var $fontList;
-	var $issetfont;
-	var $issetcolor;
-	
-	function PDF($orientation='P', $unit='mm', $format='A4')
-	{
-		//Call parent constructor
-		$this->__construct($orientation,$unit,$format);
-		//Initialization
-		$this->B=0;
-		$this->I=0;
-		$this->U=0;
-		$this->HREF='';
-		$this->fontlist=array('arial', 'times', 'courier', 'helvetica', 'symbol');
-		$this->issetfont=false;
-		$this->issetcolor=false;
-	}
-	
-	function WriteHTML($html)
-	{
-		//HTML parser
-		$html=strip_tags($html,"<b><u><i><a><img><p><br><strong><em><font><tr><blockquote><style>"); //supprime tous les tags sauf ceux reconnus
-		$html=str_replace("\n",' ',$html); //remplace retour à la ligne par un espace
-		$a=preg_split('/<(.*)>/U',$html,-1,PREG_SPLIT_DELIM_CAPTURE); //éclate la chaîne avec les balises
-		foreach($a as $i=>$e)
-		{
-			if($i%2==0)
-			{
-				//Text
-				if($this->HREF)
-					$this->PutLink($this->HREF,$e);
-				else
-					$this->Write(5,stripslashes(txtentities($e)));
-			}
-			else
-			{
-				//Tag
-				if($e[0]=='/')
-					$this->CloseTag(strtoupper(substr($e,1)));
-				else
-				{
-					//Extract attributes
-					$a2=explode(' ',$e);
-					$tag=strtoupper(array_shift($a2));
-					$attr=array();
-					foreach($a2 as $v)
-					{
-						if(preg_match('/([^=]*)=["\']?([^"\']*)/',$v,$a3))
-							$attr[strtoupper($a3[1])]=$a3[2];
-					}
-					$this->OpenTag($tag,$attr);
-				}
-			}
-		}
-	}
-	
-	function OpenTag($tag, $attr)
-	{
-		//Opening tag
-		switch($tag){
-			case 'STRONG':
-				$this->SetStyle('B',true);
-				break;
-			case 'EM':
-				$this->SetStyle('I',true);
-				break;
-			case 'B':
-			case 'I':
-			case 'U':
-				$this->SetStyle($tag,true);
-				break;
-			case 'A':
-				$this->HREF=$attr['HREF'];
-				break;
-			case 'IMG':
-				if(isset($attr['SRC']) && (isset($attr['WIDTH']) || isset($attr['HEIGHT']))) {
-					if(!isset($attr['WIDTH']))
-						$attr['WIDTH'] = 0;
-					if(!isset($attr['HEIGHT']))
-						$attr['HEIGHT'] = 0;
-					$this->Image($attr['SRC'], $this->GetX(), $this->GetY(), px2mm($attr['WIDTH']), px2mm($attr['HEIGHT']));
-				}
-				break;
-			case 'TR':
-			case 'BLOCKQUOTE':
-			case 'BR':
-				$this->Ln(5);
-				break;
-			case 'P':
-				$this->Ln(10);
-				break;
-			case 'FONT':
-				if (isset($attr['COLOR']) && $attr['COLOR']!='') {
-					$coul=hex2dec($attr['COLOR']);
-					$this->SetTextColor($coul['R'],$coul['V'],$coul['B']);
-					$this->issetcolor=true;
-				}
-				if (isset($attr['FACE']) && in_array(strtolower($attr['FACE']), $this->fontlist)) {
-					$this->SetFont(strtolower($attr['FACE']));
-					$this->issetfont=true;
-				}
-				break;
-		}
-	}
-	
-	function CloseTag($tag)
-	{
-		//Closing tag
-		if($tag=='STRONG')
-			$tag='B';
-		if($tag=='EM')
-			$tag='I';
-		if($tag=='B' || $tag=='I' || $tag=='U')
-			$this->SetStyle($tag,false);
-		if($tag=='A')
-			$this->HREF='';
-		if($tag=='FONT'){
-			if ($this->issetcolor==true) {
-				$this->SetTextColor(0);
-			}
-			if ($this->issetfont) {
-				$this->SetFont('arial');
-				$this->issetfont=false;
-			}
-		}
-	}
-	
-	function SetStyle($tag, $enable)
-	{
-		//Modify style and select corresponding font
-		$this->$tag+=($enable ? 1 : -1);
-		$style='';
-		foreach(array('B','I','U') as $s)
-		{
-			if($this->$s>0)
-				$style.=$s;
-		}
-		$this->SetFont('',$style);
-	}
-	
-	function PutLink($URL, $txt)
-	{
-		//Put a hyperlink
-		$this->SetTextColor(0,0,255);
-		$this->SetStyle('U',true);
-		$this->Write(5,$txt,$URL);
-		$this->SetStyle('U',false);
-		$this->SetTextColor(0);
-	}
+        $logo = '../resources/img/logo.png';
+        $this->Image($logo, 10, 0);
+    
+        // Title
+        $this->SetFont('Courier', 'I', 14);
+        $this->Cell(0, 5, $title_course, 0, 1, 'R');
+        $this->SetFont('Helvetica', 'I', 14);
+        $this->Cell(0, 5, $title_quiz, 0, 1, 'R');
+        
+        // Line break
+        $this->SetLineWidth(0.5);
+        $this->SetDrawColor(60, 120, 255);
+        $this->Line(10, 24, 200, 24);
+        $this->SetLineWidth(0.4);
+        $this->SetDrawColor(200);
+        $this->Line(11, 24.5, 199, 24.5);
+        $this->Ln(10);
+    }
+    
+    public function Footer()
+    {
+        global $test2pdfPlugin;
+        // Position at 1.5 cm from bottom
+        $this->SetY(-15);
+        $y = $this->GetY();
+        // Line break
+        $this->SetLineWidth(0.5);
+        $this->SetDrawColor(60, 120, 255);
+        $this->Line(10, $y, 200, $y);
+        $this->SetLineWidth(0.4);
+        $this->SetDrawColor(200);
+        $this->Line(11, $y+0.5, 199, $y+0.5);
+    
+        
+        // Arial italic 8
+        $this->SetFont('Arial', 'I', 8);
+        // Text color in gray
+        $this->SetTextColor(128);
+        // Page number
+        $this->Cell(0, 10, utf8_decode(sprintf($test2pdfPlugin->get_lang('PageX'), $this->PageNo())), 0, 0, 'C');
+        $this->Cell(0, 10, date('Y'), 0, 0, 'R');
+    }
+    
+    public $B;
+    public $I;
+    public $U;
+    public $HREF;
+    public $fontList;
+    public $issetfont;
+    public $issetcolor;
+    
+    public function PDF($orientation='P', $unit='mm', $format='A4')
+    {
+        //Call parent constructor
+        $this->__construct($orientation, $unit, $format);
+        //Initialization
+        $this->B=0;
+        $this->I=0;
+        $this->U=0;
+        $this->HREF='';
+        $this->fontlist=['arial', 'times', 'courier', 'helvetica', 'symbol'];
+        $this->issetfont=false;
+        $this->issetcolor=false;
+    }
+    
+    public function WriteHTML($html)
+    {
+        //HTML parser
+        $html=strip_tags($html, "<b><u><i><a><img><p><br><strong><em><font><tr><blockquote><style>"); //supprime tous les tags sauf ceux reconnus
+        $html=str_replace("\n", ' ', $html); //remplace retour à la ligne par un espace
+        $a=preg_split('/<(.*)>/U', $html, -1, PREG_SPLIT_DELIM_CAPTURE); //éclate la chaîne avec les balises
+        foreach ($a as $i=>$e) {
+            if ($i%2==0) {
+                //Text
+                if ($this->HREF) {
+                    $this->PutLink($this->HREF, $e);
+                } else {
+                    $this->Write(5, stripslashes(txtentities($e)));
+                }
+            } else {
+                //Tag
+                if ($e[0]=='/') {
+                    $this->CloseTag(strtoupper(substr($e, 1)));
+                } else {
+                    //Extract attributes
+                    $a2=explode(' ', $e);
+                    $tag=strtoupper(array_shift($a2));
+                    $attr=[];
+                    foreach ($a2 as $v) {
+                        if (preg_match('/([^=]*)=["\']?([^"\']*)/', $v, $a3)) {
+                            $attr[strtoupper($a3[1])]=$a3[2];
+                        }
+                    }
+                    $this->OpenTag($tag, $attr);
+                }
+            }
+        }
+    }
+    
+    public function OpenTag($tag, $attr)
+    {
+        //Opening tag
+        switch ($tag) {
+            case 'STRONG':
+                $this->SetStyle('B', true);
+                break;
+            case 'EM':
+                $this->SetStyle('I', true);
+                break;
+            case 'B':
+            case 'I':
+            case 'U':
+                $this->SetStyle($tag, true);
+                break;
+            case 'A':
+                $this->HREF=$attr['HREF'];
+                break;
+            case 'IMG':
+                if (isset($attr['SRC']) && (isset($attr['WIDTH']) || isset($attr['HEIGHT']))) {
+                    if (!isset($attr['WIDTH'])) {
+                        $attr['WIDTH'] = 0;
+                    }
+                    if (!isset($attr['HEIGHT'])) {
+                        $attr['HEIGHT'] = 0;
+                    }
+                    $this->Image($attr['SRC'], $this->GetX(), $this->GetY(), px2mm($attr['WIDTH']), px2mm($attr['HEIGHT']));
+                }
+                break;
+            case 'TR':
+            case 'BLOCKQUOTE':
+            case 'BR':
+                $this->Ln(5);
+                break;
+            case 'P':
+                $this->Ln(10);
+                break;
+            case 'FONT':
+                if (isset($attr['COLOR']) && $attr['COLOR']!='') {
+                    $coul=hex2dec($attr['COLOR']);
+                    $this->SetTextColor($coul['R'], $coul['V'], $coul['B']);
+                    $this->issetcolor=true;
+                }
+                if (isset($attr['FACE']) && in_array(strtolower($attr['FACE']), $this->fontlist)) {
+                    $this->SetFont(strtolower($attr['FACE']));
+                    $this->issetfont=true;
+                }
+                break;
+        }
+    }
+    
+    public function CloseTag($tag)
+    {
+        //Closing tag
+        if ($tag=='STRONG') {
+            $tag='B';
+        }
+        if ($tag=='EM') {
+            $tag='I';
+        }
+        if ($tag=='B' || $tag=='I' || $tag=='U') {
+            $this->SetStyle($tag, false);
+        }
+        if ($tag=='A') {
+            $this->HREF='';
+        }
+        if ($tag=='FONT') {
+            if ($this->issetcolor==true) {
+                $this->SetTextColor(0);
+            }
+            if ($this->issetfont) {
+                $this->SetFont('arial');
+                $this->issetfont=false;
+            }
+        }
+    }
+    
+    public function SetStyle($tag, $enable)
+    {
+        //Modify style and select corresponding font
+        $this->$tag+=($enable ? 1 : -1);
+        $style='';
+        foreach (['B','I','U'] as $s) {
+            if ($this->$s>0) {
+                $style.=$s;
+            }
+        }
+        $this->SetFont('', $style);
+    }
+    
+    public function PutLink($URL, $txt)
+    {
+        //Put a hyperlink
+        $this->SetTextColor(0, 0, 255);
+        $this->SetStyle('U', true);
+        $this->Write(5, $txt, $URL);
+        $this->SetStyle('U', false);
+        $this->SetTextColor(0);
+    }
 }
 
 
 //Obtener nombre del curso y nombre del ejercicio
 //$info_course = CourseManager::get_course_information_by_id($course_id);
 $info_course = api_get_course_info_by_id($course_id);
-$info_quiz = getInfoQuiz($course_id,$id_quiz);
+$info_quiz = getInfoQuiz($course_id, $id_quiz);
 $title_course = utf8_decode(removeHtml($info_course['title']));
 $title_quiz = utf8_decode(removeHtml($info_quiz['title']));
 
@@ -246,96 +248,95 @@ $array_question_id = getQuestions($course_id, $id_quiz);
 
 // Go through all questions and get the answers
 if ($_GET['type'] == 'question' || $_GET['type'] == 'all') {
-	$j = 1;
-	foreach ($array_question_id as $key => $value) {
-		$InfoQuestion = getInfoQuestion($course_id, $value);
-		if ($pdf->GetY() > 240) {
-			$pdf->AddPage();
-		}
-		$pdf->SetFont('Arial','',12);
-		$pdf->SetTextColor(64);
-		
-		if (trim($InfoQuestion['description'])!='') {
-			$j = 0;
-			$pdf->WriteHTML(utf8_decode(removeQuotes($InfoQuestion['description'])));
-			$pdf->Ln();
-			
-		} else {
-			$pdf->MultiCell(0,7,($key+$j).' - '.utf8_decode($InfoQuestion['question']),0,'L',false);
-		}
-		/*
-		
-		if($InfoQuestion['question'] == "Enunciado"){
-			$j = 0;
-			$pdf->MultiCell(0,7,utf8_decode($InfoQuestion['question']),0,'L',false);
-			if(trim($InfoQuestion['description'])!=''){
-				$pdf->WriteHTML(utf8_decode(quitar_acentos($InfoQuestion['description'])));
-				$pdf->Ln();
-			}
-		}else{
-			$pdf->MultiCell(0,7,($key+$j).' - '.utf8_decode($InfoQuestion['question']),0,'L',false);
-		}*/
-		$InfoAnswer = getAnswers($course_id, $value);
-		foreach ($InfoAnswer as $key2 => $value2) {
-			$pdf->SetFont('Arial','I',10);
-			$pdf->SetTextColor(96);
-			$pdf->Cell(1,7,'',0,0);
-			$pdf->Rect($pdf->GetX()+2,$pdf->GetY(),4,4);
-			$pdf->Cell(7,7,'',0,0);
-			$pdf->MultiCell(0,5,$letters[$key2].' - '.utf8_decode(removeHtml($value2['answer'])),0,'L',false);
-			$pdf->Ln(1);	
-		}	
-		$pdf->Ln(4);
-	}
+    $j = 1;
+    foreach ($array_question_id as $key => $value) {
+        $InfoQuestion = getInfoQuestion($course_id, $value);
+        if ($pdf->GetY() > 240) {
+            $pdf->AddPage();
+        }
+        $pdf->SetFont('Arial', '', 12);
+        $pdf->SetTextColor(64);
+        
+        if (trim($InfoQuestion['description'])!='') {
+            $j = 0;
+            $pdf->WriteHTML(utf8_decode(removeQuotes($InfoQuestion['description'])));
+            $pdf->Ln();
+        } else {
+            $pdf->MultiCell(0, 7, ($key+$j).' - '.utf8_decode($InfoQuestion['question']), 0, 'L', false);
+        }
+        /*
+
+        if($InfoQuestion['question'] == "Enunciado"){
+            $j = 0;
+            $pdf->MultiCell(0,7,utf8_decode($InfoQuestion['question']),0,'L',false);
+            if(trim($InfoQuestion['description'])!=''){
+                $pdf->WriteHTML(utf8_decode(quitar_acentos($InfoQuestion['description'])));
+                $pdf->Ln();
+            }
+        }else{
+            $pdf->MultiCell(0,7,($key+$j).' - '.utf8_decode($InfoQuestion['question']),0,'L',false);
+        }*/
+        $InfoAnswer = getAnswers($course_id, $value);
+        foreach ($InfoAnswer as $key2 => $value2) {
+            $pdf->SetFont('Arial', 'I', 10);
+            $pdf->SetTextColor(96);
+            $pdf->Cell(1, 7, '', 0, 0);
+            $pdf->Rect($pdf->GetX()+2, $pdf->GetY(), 4, 4);
+            $pdf->Cell(7, 7, '', 0, 0);
+            $pdf->MultiCell(0, 5, $letters[$key2].' - '.utf8_decode(removeHtml($value2['answer'])), 0, 'L', false);
+            $pdf->Ln(1);
+        }
+        $pdf->Ln(4);
+    }
 }
 $j=1;
 if ($_GET['type'] == 'answer' || $_GET['type'] == 'all') {
-	$array_resp = array();
-	foreach ($array_question_id as $key => $value) {
-		$InfoQuestion = getInfoQuestion($course_id,$value);
-		if ($InfoQuestion['question'] == $test2pdfPlugin->get_lang('Statement')) {
-			$j = 0;
-		} else {
-			$respuestas = '';
-			$InfoQuestion = getInfoQuestion($course_id,$value);
-			if ($InfoQuestion['type']==2 || $InfoQuestion['type']==9 || $InfoQuestion['type']==11 || $InfoQuestion['type']==12 || $InfoQuestion['type']==14) {
-				$InfoAnswer = getAnswers($course_id,$value);
-				$respuestas .= ' '.($key+$j).' -';
-				foreach ($InfoAnswer as $key2 => $value2) {
-					if ($value2['correct'] == 1) {
-						$respuestas .= ' '.$letters[$key2].',';
-					}
-				}
-				$i = strrpos($respuestas,',');
-				$respuestas = substr($respuestas,0,$i);
-				$respuestas .= ' ';
-				$array_resp[] = $respuestas;
-			} else {
-				$InfoAnswer = getAnswers($course_id,$value);
-				foreach ($InfoAnswer as $key2 => $value2) {
-					if ($value2['correct'] == 1) {
-						$respuestas .= ' '.($key+$j).' - '.$letters[$key2].' ';
-						break;
-					}
-				}
-				$array_resp[] = $respuestas;	
-			}
-		}
-	}
-	$pdf->SetFont('Arial','',12);
-	$pdf->SetTextColor(64);
-	$pdf->Cell(0, 7, utf8_decode($test2pdfPlugin->get_lang('AnswersColumn')), 0, 1, 'L', false);
+    $array_resp = [];
+    foreach ($array_question_id as $key => $value) {
+        $InfoQuestion = getInfoQuestion($course_id, $value);
+        if ($InfoQuestion['question'] == $test2pdfPlugin->get_lang('Statement')) {
+            $j = 0;
+        } else {
+            $respuestas = '';
+            $InfoQuestion = getInfoQuestion($course_id, $value);
+            if ($InfoQuestion['type']==2 || $InfoQuestion['type']==9 || $InfoQuestion['type']==11 || $InfoQuestion['type']==12 || $InfoQuestion['type']==14) {
+                $InfoAnswer = getAnswers($course_id, $value);
+                $respuestas .= ' '.($key+$j).' -';
+                foreach ($InfoAnswer as $key2 => $value2) {
+                    if ($value2['correct'] == 1) {
+                        $respuestas .= ' '.$letters[$key2].',';
+                    }
+                }
+                $i = strrpos($respuestas, ',');
+                $respuestas = substr($respuestas, 0, $i);
+                $respuestas .= ' ';
+                $array_resp[] = $respuestas;
+            } else {
+                $InfoAnswer = getAnswers($course_id, $value);
+                foreach ($InfoAnswer as $key2 => $value2) {
+                    if ($value2['correct'] == 1) {
+                        $respuestas .= ' '.($key+$j).' - '.$letters[$key2].' ';
+                        break;
+                    }
+                }
+                $array_resp[] = $respuestas;
+            }
+        }
+    }
+    $pdf->SetFont('Arial', '', 12);
+    $pdf->SetTextColor(64);
+    $pdf->Cell(0, 7, utf8_decode($test2pdfPlugin->get_lang('AnswersColumn')), 0, 1, 'L', false);
 
-	$pdf->SetFont('Arial', 'I', 10);
-	$pdf->SetTextColor(64, 64, 255);
-	$i = 1;
-	foreach ($array_resp as $resp) {
-		$pdf->Cell(50, 6, $resp, 0);
-		if($i%4 == 0){
-			$pdf->Ln();
-		}
-		$i++;
-	}
+    $pdf->SetFont('Arial', 'I', 10);
+    $pdf->SetTextColor(64, 64, 255);
+    $i = 1;
+    foreach ($array_resp as $resp) {
+        $pdf->Cell(50, 6, $resp, 0);
+        if ($i%4 == 0) {
+            $pdf->Ln();
+        }
+        $i++;
+    }
 }
 
 $pdf->Output();
diff --git a/plugin/test2pdf/src/index.test2pdf.php b/plugin/test2pdf/src/index.test2pdf.php
index b9515fa7ef..b5793ddd64 100644
--- a/plugin/test2pdf/src/index.test2pdf.php
+++ b/plugin/test2pdf/src/index.test2pdf.php
@@ -4,4 +4,3 @@
  * Index of the Test to pdf plugin courses list
  * @package chamilo.plugin.test2pdf
  */
-
diff --git a/plugin/test2pdf/src/test2pdf.lib.php b/plugin/test2pdf/src/test2pdf.lib.php
index 21e964b042..15d0fc3eba 100644
--- a/plugin/test2pdf/src/test2pdf.lib.php
+++ b/plugin/test2pdf/src/test2pdf.lib.php
@@ -11,7 +11,7 @@ require_once '../../../main/inc/global.inc.php';
 require_once '../config.php';
 require_once api_get_path(LIBRARY_PATH) . 'plugin.class.php';
 
-$letters = array('a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z');
+$letters = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'];
 
 /**
  * List exercises
@@ -25,7 +25,7 @@ function showExerciseCourse($course_id, $session_id = 0)
     $course_id = (int) $course_id;
     $session_id = (int) $session_id;
     $tableQuiz = Database::get_course_table(TABLE_QUIZ_TEST);
-	$tableLpItem = Database::get_course_table(TABLE_LP_ITEM);
+    $tableLpItem = Database::get_course_table(TABLE_LP_ITEM);
     $sql = "SELECT a.* 
       FROM $tableQuiz a 
         LEFT JOIN $tableLpItem b 
@@ -35,10 +35,10 @@ function showExerciseCourse($course_id, $session_id = 0)
         AND (a.active = 1 OR (item_type = 'quiz' AND b.c_id = $course_id)) 
         ORDER BY a.title ASC;";
     $res = Database::query($sql);
-	if (!$res) {
-		die("Error Database $tableQuiz");	
-	}
-    $aux = array();
+    if (!$res) {
+        die("Error Database $tableQuiz");
+    }
+    $aux = [];
     while ($row = Database::fetch_assoc($res)) {
         $aux[] = $row;
     }
@@ -46,7 +46,7 @@ function showExerciseCourse($course_id, $session_id = 0)
 }
 
 /**
- * List quiz details 
+ * List quiz details
  * @return array Results (list of quiz details)
  * @throws Exception
  */
@@ -54,12 +54,12 @@ function getInfoQuiz($c_id, $id)
 {
     $c_id = (int) $c_id;
     $id = (int) $id;
-	$tableQuiz = Database::get_course_table(TABLE_QUIZ_TEST);
-	$sql = "SELECT * FROM $tableQuiz WHERE c_id = $c_id AND iid = $id";
+    $tableQuiz = Database::get_course_table(TABLE_QUIZ_TEST);
+    $sql = "SELECT * FROM $tableQuiz WHERE c_id = $c_id AND iid = $id";
     $res = Database::query($sql);
-	if (!$res) {
-		die("Error Database $tableQuiz");	
-	}
+    if (!$res) {
+        die("Error Database $tableQuiz");
+    }
     $row = Database::fetch_assoc($res);
     return $row;
 }
@@ -73,27 +73,27 @@ function getQuestions($c_id, $quizId)
 {
     $c_id = (int) $c_id;
     $quizId = (int) $quizId;
-	$tableQuizQuestion = Database::get_course_table(TABLE_QUIZ_TEST_QUESTION);
-	$tableQuestion = Database::get_course_table(TABLE_QUIZ_QUESTION);
-	$sql = "SELECT a.question_id AS question_id 
+    $tableQuizQuestion = Database::get_course_table(TABLE_QUIZ_TEST_QUESTION);
+    $tableQuestion = Database::get_course_table(TABLE_QUIZ_QUESTION);
+    $sql = "SELECT a.question_id AS question_id 
         FROM $tableQuizQuestion a 
         INNER JOIN $tableQuestion b ON a.question_id = b.iid 
         WHERE a.c_id = $c_id AND b.c_id = a.c_id AND a.exercice_id = $quizId 
         AND (b.type IN (1, 2, 9, 10, 11, 12, 14))
         ORDER BY question_order ASC;";
-	$res = Database::query($sql);
-	if (!$res) {
-		die("Error Database $tableQuizQuestion");	
-	}
-	$aux = array();
+    $res = Database::query($sql);
+    if (!$res) {
+        die("Error Database $tableQuizQuestion");
+    }
+    $aux = [];
     while ($row = Database::fetch_assoc($res)) {
-		$aux[] = $row['question_id'];	
-	}
-	return $aux;
+        $aux[] = $row['question_id'];
+    }
+    return $aux;
 }
 
 /**
- * List question details 
+ * List question details
  * @return array Results (list of question details)
  * @throws Exception
  */
@@ -101,15 +101,15 @@ function getInfoQuestion($c_id, $id)
 {
     $c_id = (int) $c_id;
     $id = (int) $id;
-	$tableQuestion = Database::get_course_table(TABLE_QUIZ_QUESTION);
-	$sql = "SELECT * FROM $tableQuestion 
+    $tableQuestion = Database::get_course_table(TABLE_QUIZ_QUESTION);
+    $sql = "SELECT * FROM $tableQuestion 
         WHERE c_id = $c_id 
         AND iid = $id
         AND (type IN (1, 2, 9, 10, 11, 12, 14))";
     $res = Database::query($sql);
-	if (!$res) {
-		die("Error Database $tableQuestion");	
-	}
+    if (!$res) {
+        die("Error Database $tableQuestion");
+    }
     $row = Database::fetch_assoc($res);
     return $row;
 }
@@ -123,19 +123,19 @@ function getAnswers($c_id, $id)
 {
     $c_id = (int) $c_id;
     $id = (int) $id;
-	$tableQuizAnswer = Database::get_course_table(TABLE_QUIZ_ANSWER);
-	$sql = "SELECT * FROM $tableQuizAnswer
+    $tableQuizAnswer = Database::get_course_table(TABLE_QUIZ_ANSWER);
+    $sql = "SELECT * FROM $tableQuizAnswer
 	    WHERE c_id = $c_id AND question_id = $id
 	    ORDER BY position ASC;";
     $res = Database::query($sql);
-	if (!$res) {
-		die("Error Database $tableQuizAnswer");	
-	}
-	$aux = array();
+    if (!$res) {
+        die("Error Database $tableQuizAnswer");
+    }
+    $aux = [];
     while ($row = Database::fetch_assoc($res)) {
-		$aux[] = $row;
-	}
-	return $aux;
+        $aux[] = $row;
+    }
+    return $aux;
 }
 
 /**
@@ -145,49 +145,49 @@ function getAnswers($c_id, $id)
  */
 function removeHtml($string)
 {
-	$txt=str_replace("<html>","",$string);
-	$txt=str_replace("<head>","",$txt);
-	$txt=str_replace("<title>","",$txt);
-	$txt=str_replace("</title>","",$txt);
-	$txt=str_replace("</head>","",$txt);
-	$txt=str_replace("<body>","",$txt);
-	$txt=str_replace("</body>","",$txt);
-	$txt=str_replace("</html>","",$txt);
-	$txt=strip_tags($txt);
-	$txt=str_replace(chr(13).chr(10),"",$txt);
+    $txt=str_replace("<html>", "", $string);
+    $txt=str_replace("<head>", "", $txt);
+    $txt=str_replace("<title>", "", $txt);
+    $txt=str_replace("</title>", "", $txt);
+    $txt=str_replace("</head>", "", $txt);
+    $txt=str_replace("<body>", "", $txt);
+    $txt=str_replace("</body>", "", $txt);
+    $txt=str_replace("</html>", "", $txt);
+    $txt=strip_tags($txt);
+    $txt=str_replace(chr(13).chr(10), "", $txt);
 
-	/*
-	$txt=str_replace("&nbsp;"," ",$txt);
-	$txt=str_replace("&Aacute;","Á",$txt);
-	$txt=str_replace("&aacute;","á",$txt);
-	$txt=str_replace("&Eacute;","É",$txt);
-	$txt=str_replace("&eacute;","é",$txt);
-	$txt=str_replace("&Iacute;","Í",$txt);
-	$txt=str_replace("&iacute;","í",$txt);
-	$txt=str_replace("&Oacute;","Ó",$txt);
-	$txt=str_replace("&oacute;","ó",$txt);
-	$txt=str_replace("&Uacute;","Ú",$txt);
-	$txt=str_replace("&uacute;","ú",$txt);
-	$txt=str_replace("&Ntilde;","Ñ",$txt);
-	$txt=str_replace("&ntilde;","ñ",$txt);
-	$txt=str_replace("&agrave;","à",$txt);
-	$txt=str_replace("&Agrave;","À",$txt);
-	$txt=str_replace("&iexcl;","¡",$txt);
-	$txt=str_replace("&middot;","·",$txt);
-	$txt=str_replace("&Ccedil;","Ç",$txt);
-	$txt=str_replace("&ccedil;","ç",$txt);
-	$txt=str_replace("&quot;",'"',$txt);
-	$txt=str_replace("&ordf;",'ª',$txt);
-	$txt=str_replace("&ordm;",'º',$txt);
-	$txt=str_replace("&amp;",'&',$txt);
-	$txt=str_replace("&bull;",'•',$txt);
-	$txt=str_replace("&iquest;",'¿',$txt);
-	$txt=str_replace("&euro;",'EUR',$txt);
-	$txt=str_replace("&uuml;",'ü',$txt);
-	$txt=str_replace("&Uuml;",'Ü',$txt);
-	$txt=str_replace("&uml;",'¨',$txt);*/
-	
-	return $txt;
+    /*
+    $txt=str_replace("&nbsp;"," ",$txt);
+    $txt=str_replace("&Aacute;","Á",$txt);
+    $txt=str_replace("&aacute;","á",$txt);
+    $txt=str_replace("&Eacute;","É",$txt);
+    $txt=str_replace("&eacute;","é",$txt);
+    $txt=str_replace("&Iacute;","Í",$txt);
+    $txt=str_replace("&iacute;","í",$txt);
+    $txt=str_replace("&Oacute;","Ó",$txt);
+    $txt=str_replace("&oacute;","ó",$txt);
+    $txt=str_replace("&Uacute;","Ú",$txt);
+    $txt=str_replace("&uacute;","ú",$txt);
+    $txt=str_replace("&Ntilde;","Ñ",$txt);
+    $txt=str_replace("&ntilde;","ñ",$txt);
+    $txt=str_replace("&agrave;","à",$txt);
+    $txt=str_replace("&Agrave;","À",$txt);
+    $txt=str_replace("&iexcl;","¡",$txt);
+    $txt=str_replace("&middot;","·",$txt);
+    $txt=str_replace("&Ccedil;","Ç",$txt);
+    $txt=str_replace("&ccedil;","ç",$txt);
+    $txt=str_replace("&quot;",'"',$txt);
+    $txt=str_replace("&ordf;",'ª',$txt);
+    $txt=str_replace("&ordm;",'º',$txt);
+    $txt=str_replace("&amp;",'&',$txt);
+    $txt=str_replace("&bull;",'•',$txt);
+    $txt=str_replace("&iquest;",'¿',$txt);
+    $txt=str_replace("&euro;",'EUR',$txt);
+    $txt=str_replace("&uuml;",'ü',$txt);
+    $txt=str_replace("&Uuml;",'Ü',$txt);
+    $txt=str_replace("&uml;",'¨',$txt);*/
+    
+    return $txt;
 }
 
 /**
@@ -197,37 +197,37 @@ function removeHtml($string)
  */
 function removeQuotes($string)
 {
-	//$txt=strip_tags($cadena);
-	$txt=str_replace("&nbsp;"," ",$string);
-	$txt=str_replace("&Aacute;","Á",$txt);
-	$txt=str_replace("&aacute;","á",$txt);
-	$txt=str_replace("&Eacute;","É",$txt);
-	$txt=str_replace("&eacute;","é",$txt);
-	$txt=str_replace("&Iacute;","Í",$txt);
-	$txt=str_replace("&iacute;","í",$txt);
-	$txt=str_replace("&Oacute;","Ó",$txt);
-	$txt=str_replace("&oacute;","ó",$txt);
-	$txt=str_replace("&Uacute;","Ú",$txt);
-	$txt=str_replace("&uacute;","ú",$txt);
-	$txt=str_replace("&Ntilde;","Ñ",$txt);
-	$txt=str_replace("&ntilde;","ñ",$txt);
-	$txt=str_replace("&quot;",'"',$txt);
-	$txt=str_replace("&ordf;",'ª',$txt);
-	$txt=str_replace("&ordm;",'º',$txt);
-	$txt=str_replace("&amp;",'&',$txt);
-	$txt=str_replace("&bull;",'•',$txt);
-	$txt=str_replace("&iquest; &",'¿',$txt);
-	$txt=str_replace("&agrave;","à",$txt);
-	$txt=str_replace("&Agrave;","À",$txt);
-	$txt=str_replace("&iexcl;","¡",$txt);
-	$txt=str_replace("&middot;","·",$txt);
-	$txt=str_replace("&Ccedil;","Ç",$txt);
-	$txt=str_replace("&ccedil;","ç",$txt);
-	$txt=str_replace("&euro;",'EUR',$txt);
-	$txt=str_replace("&uuml;",'ü',$txt);
-	$txt=str_replace("&Uuml;",'Ü',$txt);
-	$txt=str_replace("uml;",'¨',$txt);
-	return $txt;
+    //$txt=strip_tags($cadena);
+    $txt=str_replace("&nbsp;", " ", $string);
+    $txt=str_replace("&Aacute;", "Á", $txt);
+    $txt=str_replace("&aacute;", "á", $txt);
+    $txt=str_replace("&Eacute;", "É", $txt);
+    $txt=str_replace("&eacute;", "é", $txt);
+    $txt=str_replace("&Iacute;", "Í", $txt);
+    $txt=str_replace("&iacute;", "í", $txt);
+    $txt=str_replace("&Oacute;", "Ó", $txt);
+    $txt=str_replace("&oacute;", "ó", $txt);
+    $txt=str_replace("&Uacute;", "Ú", $txt);
+    $txt=str_replace("&uacute;", "ú", $txt);
+    $txt=str_replace("&Ntilde;", "Ñ", $txt);
+    $txt=str_replace("&ntilde;", "ñ", $txt);
+    $txt=str_replace("&quot;", '"', $txt);
+    $txt=str_replace("&ordf;", 'ª', $txt);
+    $txt=str_replace("&ordm;", 'º', $txt);
+    $txt=str_replace("&amp;", '&', $txt);
+    $txt=str_replace("&bull;", '•', $txt);
+    $txt=str_replace("&iquest; &", '¿', $txt);
+    $txt=str_replace("&agrave;", "à", $txt);
+    $txt=str_replace("&Agrave;", "À", $txt);
+    $txt=str_replace("&iexcl;", "¡", $txt);
+    $txt=str_replace("&middot;", "·", $txt);
+    $txt=str_replace("&Ccedil;", "Ç", $txt);
+    $txt=str_replace("&ccedil;", "ç", $txt);
+    $txt=str_replace("&euro;", 'EUR', $txt);
+    $txt=str_replace("&uuml;", 'ü', $txt);
+    $txt=str_replace("&Uuml;", 'Ü', $txt);
+    $txt=str_replace("uml;", '¨', $txt);
+    return $txt;
 }
 
 /**
@@ -243,7 +243,7 @@ function hex2dec($color = '#000000')
     $vert = hexdec($V);
     $B = substr($color, 5, 2);
     $bleu = hexdec($B);
-    $tbl_couleur = array();
+    $tbl_couleur = [];
     $tbl_couleur['R'] = $rouge;
     $tbl_couleur['V'] = $vert;
     $tbl_couleur['B'] = $bleu;
@@ -271,4 +271,3 @@ function txtentities($html)
     $trans = array_flip($trans);
     return strtr($html, $trans);
 }
-
diff --git a/plugin/test2pdf/src/test2pdf_plugin.class.php b/plugin/test2pdf/src/test2pdf_plugin.class.php
index 898bc5c781..445379111c 100644
--- a/plugin/test2pdf/src/test2pdf_plugin.class.php
+++ b/plugin/test2pdf/src/test2pdf_plugin.class.php
@@ -1,5 +1,5 @@
 <?php
-/* For license terms, see /license.txt 
+/* For license terms, see /license.txt
 /* To show the plugin course icons you need to add these icons:
  * main/img/icons/22/ranking.png
  * main/img/icons/64/ranking.png
@@ -15,12 +15,12 @@
  */
 class Test2pdfPlugin extends Plugin
 {
-	public $isCoursePlugin = true;
+    public $isCoursePlugin = true;
     /**
      *
      * @return StaticPlugin
      */
-    static function create()
+    public static function create()
     {
         static $result = null;
         return $result ? $result : $result = new self();
@@ -31,18 +31,18 @@ class Test2pdfPlugin extends Plugin
         parent::__construct(
             '1.0',
             'Jose Angel Ruiz - NoSoloRed (original author)',
-            array(
-                'enable_plugin' => 'boolean'				
-            )
+            [
+                'enable_plugin' => 'boolean'
+            ]
         );
     }
 
     /**
      * This method creates the tables required to this plugin
      */
-    function install()
+    public function install()
     {
-		//Installing course settings
+        //Installing course settings
         $this->install_course_fields_in_all_courses();
         require_once api_get_path(SYS_PLUGIN_PATH) . 'test2pdf/database.php';
     }
@@ -50,14 +50,14 @@ class Test2pdfPlugin extends Plugin
     /**
      * This method drops the plugin tables
      */
-    function uninstall()
+    public function uninstall()
     {
-		//Deleting course settings
+        //Deleting course settings
         $this->uninstall_course_fields_in_all_courses($this->course_settings);
-		
-        $tablesToBeDeleted = array(
-			TABLE_TEST2PDF
-        );
+        
+        $tablesToBeDeleted = [
+            TABLE_TEST2PDF
+        ];
         foreach ($tablesToBeDeleted as $tableToBeDeleted) {
             $table = Database::get_main_table($tableToBeDeleted);
             $sql = "DROP TABLE IF EXISTS $tableToBeDeleted";
diff --git a/plugin/test2pdf/src/view-pdf.php b/plugin/test2pdf/src/view-pdf.php
index 39f0496c9f..8eba833e72 100644
--- a/plugin/test2pdf/src/view-pdf.php
+++ b/plugin/test2pdf/src/view-pdf.php
@@ -16,23 +16,23 @@ $plugin = Test2pdfPlugin::create();
 $t2p_plugin = $plugin->get('enable_plugin');
 
 if ($t2p_plugin === 'true') {
-	$templateName = $plugin->get_lang('ViewExercises');
-	$tpl = new Template($templateName);
-	$course_id = api_get_course_int_id();
-	
-	// Leer Datos y Mostrar tabla
-	$iconInfo = api_get_path(WEB_PLUGIN_PATH) . 'test2pdf/resources/img/24/info.png';
-	$iconDownload = api_get_path(WEB_PLUGIN_PATH) . 'test2pdf/resources/img/32/download.png';
-	$info_exercise = showExerciseCourse($course_id);
-	$tpl->assign('infoExercise', $info_exercise);
-	$tpl->assign('course_id', $course_id);
-	$tpl->assign('iconInfo',$iconInfo);
-	$tpl->assign('iconDownload',$iconDownload);
-	
-	$listing_tpl = 'test2pdf/view/view-pdf.tpl';
-	$content = $tpl->fetch($listing_tpl);
-	$tpl->assign('content', $content);
-	$tpl->display_one_col_template();
+    $templateName = $plugin->get_lang('ViewExercises');
+    $tpl = new Template($templateName);
+    $course_id = api_get_course_int_id();
+    
+    // Leer Datos y Mostrar tabla
+    $iconInfo = api_get_path(WEB_PLUGIN_PATH) . 'test2pdf/resources/img/24/info.png';
+    $iconDownload = api_get_path(WEB_PLUGIN_PATH) . 'test2pdf/resources/img/32/download.png';
+    $info_exercise = showExerciseCourse($course_id);
+    $tpl->assign('infoExercise', $info_exercise);
+    $tpl->assign('course_id', $course_id);
+    $tpl->assign('iconInfo', $iconInfo);
+    $tpl->assign('iconDownload', $iconDownload);
+    
+    $listing_tpl = 'test2pdf/view/view-pdf.tpl';
+    $content = $tpl->fetch($listing_tpl);
+    $tpl->assign('content', $content);
+    $tpl->display_one_col_template();
 } else {
-	header('Location: ../../../index.php');	
-}
\ No newline at end of file
+    header('Location: ../../../index.php');
+}
diff --git a/plugin/test2pdf/start.php b/plugin/test2pdf/start.php
index a5a3814821..5ab3a51d8c 100644
--- a/plugin/test2pdf/start.php
+++ b/plugin/test2pdf/start.php
@@ -19,9 +19,9 @@ $plugin = Test2pdfPlugin::create();
 $t2p_plugin = $plugin->get('enable_plugin');
 
 if ($t2p_plugin == "true") {
-	$url = 'src/view-pdf.php?'.api_get_cidreq();
-	header('Location: ' . $url);
-	exit;
-}else{
-	echo get_lang('PluginDisabledFromAdminPanel');
-}
\ No newline at end of file
+    $url = 'src/view-pdf.php?'.api_get_cidreq();
+    header('Location: ' . $url);
+    exit;
+} else {
+    echo get_lang('PluginDisabledFromAdminPanel');
+}