upgrade

plugin/test2pdf/README.md

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+Test2Pdf plugin
+===============
+
+This plugin allows you to export questions from exercises to PDF
+
+Este plugin da la posibilidad de obtener en formato PDF aquellas preguntas tipos test en los ejercicios de un curso.
+
+Credits
+-------
+Contributed by [Nosolored](https://www.nosolored.com/).
+Icons made by [Freepik](http://www.flaticon.com/authors/freepik) from [Flaticon](http://www.flaticon.com), and licensed as [Creative Commons BY 3.0](http://creativecommons.org/licenses/by/3.0/)

plugin/test2pdf/config.php

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+<?php
+/* For licensing terms, see /license.txt */
+/**
+ * Config the plugin.
+ *
+ * @package chamilo.plugin.test2pdf
+ *
+ * @author Jose Angel Ruiz <desarrollo@nosolored.com>
+ */
+require_once __DIR__.'/../../main/inc/global.inc.php';
+require_once 'src/test2pdf.lib.php';
+require_once api_get_path(SYS_PLUGIN_PATH).'test2pdf/src/test2pdf_plugin.class.php';

plugin/test2pdf/index.php

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+<?php
+/* For license terms, see /license.txt */
+/**
+ * Show form.
+ */
+require_once 'config.php';
+require_once 'src/index.test2pdf.php';

plugin/test2pdf/install.php

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+<?php
+/* For license terms, see /license.txt */
+/**
+ * This script is included by main/admin/settings.lib.php and generally
+ * includes things to execute in the main database (settings_current table).
+ *
+ * @package chamilo.plugin.test2pdf
+ */
+/**
+ * Initialization.
+ */
+require_once __DIR__.'/config.php';
+if (!api_is_platform_admin()) {
+    exit('You must have admin permissions to install plugins');
+}
+Test2pdfPlugin::create()->install();

plugin/test2pdf/lang/english.php

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+<?php
+$strings['plugin_title'] = "Test to Pdf (Test2Pdf)";
+$strings['plugin_comment'] = "Gives the possibility to export the questions of a quiz in PDF format.";
+$strings['Test2pdf'] = "Test to PDF";
+$strings['enable_plugin'] = "Enable plugin";
+$strings['ViewExercises'] = "View exercises";
+$strings['NoExercise'] = "No exercise available";
+$strings['Exercise'] = "Exercise";
+$strings['DownloadOnlyQuestion'] = "Download questions";
+$strings['DownloadOnlyAnswer'] = "Download answers";
+$strings['DownloadAll'] = "Download all";
+$strings['PluginDisabledFromAdminPanel'] = "The plugin has been disabled from the admin panel";
+$strings['AnswersColumn'] = "Answers: ";
+$strings['Statement'] = "Statement";
+$strings['PageX'] = "Page %s";

plugin/test2pdf/lang/french.php

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+<?php
+$strings['plugin_title'] = "Test à Pdf (Test2Pdf)";
+$strings['plugin_comment'] = "Donne la possibilité de télécharger dans des questions d'un exercice au format PDF.";
+$strings['Test2pdf'] = "Test à PDF";
+$strings['enable_plugin'] = "Activer le plugin";
+$strings['ViewExercises'] = "Voir les exercices";
+$strings['NoExercise'] = "Aucun exercice dans le cours";
+$strings['Exercise'] = "Exercice";
+$strings['DownloadOnlyQuestion'] = "Télécharger les questions";
+$strings['DownloadOnlyAnswer'] = "Télécharger les réponses";
+$strings['DownloadAll'] = "Tout télécharger";
+$strings['PluginDisabledFromAdminPanel'] = "Le plugin a été désactivé depuis la page d'administration";
+$strings['AnswersColumn'] = "Réponses: ";
+$strings['Statement'] = "Énoncé";
+$strings['PageX'] = "Page %s";

plugin/test2pdf/lang/spanish.php

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+<?php
+$strings['plugin_title'] = "Test a Pdf (Test2Pdf)";
+$strings['plugin_comment'] = "Este plugin permite poder descargar en pdf los ejercicios tipo test.";
+$strings['Test2pdf'] = "Test a PDF";
+$strings['enable_plugin'] = "Activar plugin";
+$strings['ViewExercises'] = "Ver ejercicios";
+$strings['NoExercise'] = "Sin ejercicios creados en el curso";
+$strings['Exercise'] = "Ejercicio";
+$strings['DownloadOnlyQuestion'] = "Descargar preguntas";
+$strings['DownloadOnlyAnswer'] = "Descargar respuestas";
+$strings['DownloadAll'] = "Descargar todo";
+$strings['PluginDisabledFromAdminPanel'] = "La herramienta está deshabilitada desde la administración";
+$strings['AnswersColumn'] = "Respuestas: ";
+$strings['Statement'] = "Enunciado";
+$strings['PageX'] = "Página %s";

plugin/test2pdf/plugin.php

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+<?php
+/* For license terms, see /license.txt */
+/**
+ * This script is a configuration file for the date plugin. You can use it as a master for other platform plugins (course plugins are slightly different).
+ * These settings will be used in the administration interface for plugins (Chamilo configuration settings->Plugins).
+ *
+ * @package chamilo.plugin.test2pdf
+ */
+/**
+ * Plugin details (must be present).
+ */
+require_once __DIR__.'/config.php';
+$plugin_info = Test2pdfPlugin::create()->get_info();

plugin/test2pdf/resources/css/style.css

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+#courses_table td.valign-middle{
+	vertical-align: middle;
+}

plugin/test2pdf/src/download-pdf.php

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+<?php
+/* For license terms, see /license.txt */
+
+require_once '../config.php';
+
+$plugin = Test2pdfPlugin::create();
+$enable = $plugin->get('enable_plugin') == 'true';
+if (!$enable) {
+    header('Location: ../../../index.php');
+    exit;
+}
+
+api_protect_course_script();
+
+$courseId = intval($_GET['c_id']);
+$sessionId = api_get_session_id();
+$quizId = intval($_GET['id_quiz']);
+
+$infoCourse = api_get_course_info_by_id($courseId);
+$infoQuiz = getInfoQuiz($courseId, $quizId);
+$titleCourse = removeHtml($infoCourse['title']);
+$titleQuiz = removeHtml($infoQuiz['title']);
+
+$mpdf = new PDF();
+$mpdf->set_header($infoCourse);
+$mpdf->set_footer();
+$pdf = $mpdf->pdf;
+$pdf->SetTitle($titleCourse.' - '.$titleQuiz);
+$pdf->AddPage();
+
+$pdf->SetFont('Arial', '', 16);
+$pdf->SetTextColor(64);
+$pdf->MultiCell(0, 7, $titleQuiz, 0, 'L', false);
+if (!empty($infoQuiz['description'])) {
+    $pdf->WriteHTML(
+        PDF::fixImagesPaths(
+            removeQuotes($infoQuiz['description']),
+            $infoCourse
+        )
+    );
+}
+
+// Select all questions of the supported types from the given course
+$questionsList = getQuestionsFromCourse($courseId, $quizId, $sessionId);
+
+// Go through all questions and get the answers
+if ($_GET['type'] == 'question' || $_GET['type'] == 'all') {
+    $j = 1;
+    foreach ($questionsList as $key => $value) {
+        $infoQuestion = getInfoQuestion($courseId, $value);
+        if ($pdf->y > 240) {
+            $pdf->AddPage();
+        }
+        $pdf->SetFont('Arial', '', 12);
+        $pdf->SetTextColor(64);
+        $pdf->MultiCell(0, 7, ($key + $j).' - '.$infoQuestion['question'], 0, 'L', false);
+        if (!empty($infoQuestion['description'])) {
+            $pdf->WriteHTML(
+                PDF::fixImagesPaths(
+                    removeQuotes($infoQuestion['description']),
+                    $infoCourse
+                )
+            );
+        }
+
+        $infoAnswer = getAnswers($courseId, $value);
+        foreach ($infoAnswer as $key2 => $value2) {
+            $pdf->SetFont('Arial', 'I', 10);
+            $pdf->SetTextColor(96);
+            if ($infoQuestion['type'] == 3) {
+                $listAnswerInfo = getAnswerFillInBlanks($value2['answer']);
+                $answerText = $listAnswerInfo['text'];
+                if (!empty($listAnswerInfo['words_with_bracket'])) {
+                    foreach ($listAnswerInfo['words_with_bracket'] as $wordWithBracket) {
+                        if (!empty($wordWithBracket)) {
+                            $answerText = str_replace($wordWithBracket, '[_____]', $answerText);
+                        }
+                    }
+                }
+                $answerText = str_replace(['<p>', '</p>'], ['', '. '], $answerText);
+                $pdf->MultiCell(0, 5, removeHtml($answerText), 0, 'L', false);
+            } else {
+                $pdf->Cell(1, 7, '', 0, 0);
+                $pdf->Rect($pdf->x + 2, $pdf->y, 4, 4);
+                $pdf->Cell(7, 7, '', 0, 0);
+                $pdf->MultiCell(0, 5, $letters[$key2].' - '.removeHtml($value2['answer']), 0, 'L', false);
+            }
+            $pdf->Ln(1);
+        }
+        $pdf->Ln(4);
+    }
+}
+$j = 1;
+if ($_GET['type'] == 'answer' || $_GET['type'] == 'all') {
+    $answerList = [];
+    foreach ($questionsList as $key => $value) {
+        $infoQuestion = getInfoQuestion($courseId, $value);
+        if ($infoQuestion['question'] == $plugin->get_lang('Statement')) {
+            $j = 0;
+        } else {
+            $answers = '';
+            $infoQuestion = getInfoQuestion($courseId, $value);
+            if ($infoQuestion['type'] == 2 ||
+                $infoQuestion['type'] == 3 ||
+                $infoQuestion['type'] == 9 ||
+                $infoQuestion['type'] == 11 ||
+                $infoQuestion['type'] == 12 ||
+                $infoQuestion['type'] == 14
+            ) {
+                $infoAnswer = getAnswers($courseId, $value);
+                $answers .= ' '.($key + $j).' -';
+                if ($infoQuestion['type'] == 3) {
+                    foreach ($infoAnswer as $key2 => $value2) {
+                        $listAnswerInfo = getAnswerFillInBlanks($value2['answer']);
+                        if (!empty($listAnswerInfo['words'])) {
+                            $answersList = implode(', ', $listAnswerInfo['words']);
+                            $answers .= clearStudentAnswer($answersList);
+                        }
+                    }
+                } else {
+                    foreach ($infoAnswer as $key2 => $value2) {
+                        if ($value2['correct'] == 1) {
+                            $answers .= ' '.$letters[$key2].',';
+                        }
+                    }
+                    $i = strrpos($answers, ',');
+                    $answers = substr($answers, 0, $i);
+                    $answers .= ' ';
+                }
+                $answerList[] = $answers;
+            } else {
+                $infoAnswer = getAnswers($courseId, $value);
+                foreach ($infoAnswer as $key2 => $value2) {
+                    if ($value2['correct'] == 1) {
+                        $answers .= ' '.($key + $j).' - '.$letters[$key2].' ';
+                        break;
+                    }
+                }
+                $answerList[] = $answers;
+            }
+        }
+    }
+    $pdf->SetFont('Arial', '', 12);
+    $pdf->SetTextColor(64);
+    $pdf->Cell(0, 7, $plugin->get_lang('AnswersColumn'), 0, 1, 'L', false);
+
+    $pdf->SetFont('Arial', 'I', 10);
+    $pdf->SetTextColor(64, 64, 255);
+    $i = 1;
+    foreach ($answerList as $resp) {
+        $pdf->Cell(50, 6, $resp, 0);
+        if ($i % 4 == 0) {
+            $pdf->Ln();
+        }
+        $i++;
+    }
+}
+
+$typeSuffix = 'q';
+switch ($_GET['type']) {
+    case 'question':
+        $typeSuffix = 'Q';
+        break;
+    case 'answer':
+        $typeSuffix = 'A';
+        break;
+    case 'all':
+        $typeSuffix = 'QA';
+        break;
+}
+// Name the file download as something like 'C2-S0-Q34-QA' where C is course ID, S is session ID, Q is quiz ID & QA is the type
+$filename = 'C'.$courseId.'-S'.(empty($sessionId) ? '0' : $sessionId).'-Q'.$quizId.'-'.$typeSuffix;
+$pdf->Output($filename, 'I');

plugin/test2pdf/src/index.php

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+<?php

plugin/test2pdf/src/index.test2pdf.php

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+<?php
+/* For license terms, see /license.txt */
+/**
+ * Index of the Test to pdf plugin courses list.
+ *
+ * @package chamilo.plugin.test2pdf
+ */

plugin/test2pdf/src/test2pdf.lib.php

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+<?php
+/* For license terms, see /license.txt */
+/**
+ * Functions.
+ *
+ * @package chamilo.plugin.test2pdf
+ */
+$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.
+ *
+ * @param int $courseId  Course ID
+ * @param int $sessionId Session ID
+ *
+ * @throws Exception
+ *
+ * @return array Results (list of exercise details)
+ */
+function showExerciseCourse($courseId, $sessionId = 0)
+{
+    $tableQuiz = Database::get_course_table(TABLE_QUIZ_TEST);
+    $tableLpItem = Database::get_course_table(TABLE_LP_ITEM);
+    $courseId = (int) $courseId;
+    $sessionId = (int) $sessionId;
+    $conditionSession = api_get_session_condition($sessionId, true, true, 'a.session_id');
+    $sql = "SELECT a.*
+            FROM $tableQuiz a
+            LEFT JOIN $tableLpItem b ON a.iid = b.path AND a.c_id = b.c_id
+            WHERE a.c_id = $courseId
+            AND (a.active = 1 OR (item_type = 'quiz' AND b.c_id = $courseId))
+            $conditionSession
+            ORDER BY a.title ASC;";
+    $res = Database::query($sql);
+    $aux = [];
+    while ($row = Database::fetch_assoc($res)) {
+        $aux[] = $row;
+    }
+
+    return $aux;
+}
+
+/**
+ * List quiz details.
+ *
+ * @throws Exception
+ *
+ * @return array Results (list of quiz details)
+ */
+function getInfoQuiz($courseId, $id)
+{
+    $courseId = (int) $courseId;
+    $id = (int) $id;
+    $tableQuiz = Database::get_course_table(TABLE_QUIZ_TEST);
+    $sql = "SELECT * FROM $tableQuiz WHERE iid = $id";
+    $res = Database::query($sql);
+    $row = Database::fetch_assoc($res);
+
+    return $row;
+}
+
+/**
+ * List question_id.
+ *
+ * @throws Exception
+ *
+ * @return array Results (list question ID)
+ */
+function getQuestionsFromCourse($courseId, $quizId, $sessionId = 0)
+{
+    $courseId = (int) $courseId;
+    $quizId = (int) $quizId;
+    $sessionId = (int) $sessionId;
+
+    $tableQuizQuestion = Database::get_course_table(TABLE_QUIZ_TEST_QUESTION);
+    $tableQuestion = Database::get_course_table(TABLE_QUIZ_QUESTION);
+    $tableQuiz = Database::get_course_table(TABLE_QUIZ_TEST);
+    $conditionSession = api_get_session_condition($sessionId, true, true, 'q.session_id');
+
+    $sql = "SELECT a.question_id AS question_id
+            FROM $tableQuizQuestion a
+            INNER JOIN $tableQuestion b ON a.question_id = b.iid
+            INNER JOIN $tableQuiz q ON q.iid = a.exercice_id
+            WHERE a.c_id = $courseId AND a.exercice_id = $quizId
+            AND (b.type IN (1, 2, 3, 9, 10, 11, 12, 14))
+            $conditionSession
+            ORDER BY question_order ASC;";
+    $res = Database::query($sql);
+    $aux = [];
+    while ($row = Database::fetch_assoc($res)) {
+        $aux[] = $row['question_id'];
+    }
+
+    return $aux;
+}
+
+/**
+ * List question details.
+ *
+ * @throws Exception
+ *
+ * @return array Results (list of question details)
+ */
+function getInfoQuestion($courseId, $id)
+{
+    $courseId = (int) $courseId;
+    $id = (int) $id;
+    $tableQuestion = Database::get_course_table(TABLE_QUIZ_QUESTION);
+    $sql = "SELECT * FROM $tableQuestion
+            WHERE
+                iid = $id
+            AND (type IN (1, 2, 3, 9, 10, 11, 12, 14))";
+    $res = Database::query($sql);
+    $row = Database::fetch_assoc($res);
+
+    return $row;
+}
+
+/**
+ * List answer details.
+ *
+ * @throws Exception
+ *
+ * @return array Results (list of answer by question_id)
+ */
+function getAnswers($courseId, $id)
+{
+    $courseId = (int) $courseId;
+    $id = (int) $id;
+    $tableQuizAnswer = Database::get_course_table(TABLE_QUIZ_ANSWER);
+    $sql = "SELECT * FROM $tableQuizAnswer
+    	    WHERE question_id = $id
+    	    ORDER BY position ASC;";
+    $res = Database::query($sql);
+    $aux = [];
+    while ($row = Database::fetch_assoc($res)) {
+        $aux[] = $row;
+    }
+
+    return $aux;
+}
+
+/**
+ * Information of an answer type Fill in the blanks.
+ *
+ * @param $answer
+ *
+ * @return array
+ */
+function getAnswerFillInBlanks($answer)
+{
+    $listAnswerResults = [];
+    $listAnswerResults['text'] = '';
+    $listAnswerResults['words_count'] = 0;
+    $listAnswerResults['words_with_bracket'] = [];
+    $listAnswerResults['words'] = [];
+    $listAnswerResults['weighting'] = [];
+    $listAnswerResults['input_size'] = [];
+    $listAnswerResults['switchable'] = '';
+    $listAnswerResults['student_answer'] = [];
+    $listAnswerResults['student_score'] = [];
+    $listAnswerResults['blank_separator_number'] = 0;
+    $listDoubleColon = [];
+
+    api_preg_match("/(.*)::(.*)$/s", $answer, $listResult);
+
+    if (count($listResult) < 2) {
+        $listDoubleColon[] = '';
+        $listDoubleColon[] = '';
+    } else {
+        $listDoubleColon[] = $listResult[1];
+        $listDoubleColon[] = $listResult[2];
+    }
+
+    $listAnswerResults['system_string'] = $listDoubleColon[1];
+
+    // Make sure we only take the last bit to find special marks
+    $listArobaseSplit = explode('@', $listDoubleColon[1]);
+
+    if (count($listArobaseSplit) < 2) {
+        $listArobaseSplit[1] = '';
+    }
+
+    // Take the complete string except after the last '::'
+    $listDetails = explode(':', $listArobaseSplit[0]);
+
+    // < number of item after the ::[score]:[size]:[separator_id]@ , here there are 3
+    if (count($listDetails) < 3) {
+        $listWeightings = explode(',', $listDetails[0]);
+        $listSizeOfInput = [];
+        for ($i = 0; $i < count($listWeightings); $i++) {
+            $listSizeOfInput[] = 200;
+        }
+        $blankSeparatorNumber = 0; // 0 is [...]
+    } else {
+        $listWeightings = explode(',', $listDetails[0]);
+        $listSizeOfInput = explode(',', $listDetails[1]);
+        $blankSeparatorNumber = $listDetails[2];
+    }
+
+    $listSeparators = [
+        ['[', ']'],
+        ['{', '}'],
+        ['(', ')'],
+        ['*', '*'],
+        ['#', '#'],
+        ['%', '%'],
+        ['$', '$'],
+    ];
+
+    $listAnswerResults['text'] = $listDoubleColon[0];
+    $listAnswerResults['weighting'] = $listWeightings;
+    $listAnswerResults['input_size'] = $listSizeOfInput;
+    $listAnswerResults['switchable'] = $listArobaseSplit[1];
+    $listAnswerResults['blank_separator_start'] = $listSeparators[$blankSeparatorNumber][0];
+    $listAnswerResults['blank_separator_end'] = $listSeparators[$blankSeparatorNumber][1];
+    $listAnswerResults['blank_separator_number'] = $blankSeparatorNumber;
+
+    $blankCharStart = $listSeparators[$blankSeparatorNumber][0];
+    $blankCharEnd = $listSeparators[$blankSeparatorNumber][1];
+    $blankCharStartForRegexp = escapeForRegexp($blankCharStart);
+    $blankCharEndForRegexp = escapeForRegexp($blankCharEnd);
+
+    // Get all blanks words
+    $listAnswerResults['words_count'] = api_preg_match_all(
+        '/'.$blankCharStartForRegexp.'[^'.$blankCharEndForRegexp.']*'.$blankCharEndForRegexp.'/',
+        $listDoubleColon[0],
+        $listWords
+    );
+
+    if ($listAnswerResults['words_count'] > 0) {
+        $listAnswerResults['words_with_bracket'] = $listWords[0];
+        // remove [ and ] in string
+        array_walk(
+            $listWords[0],
+            function (&$value, $key, $tabBlankChar) {
+                $trimChars = '';
+                for ($i = 0; $i < count($tabBlankChar); $i++) {
+                    $trimChars .= $tabBlankChar[$i];
+                }
+                $value = trim($value, $trimChars);
+                $key = trim($key);
+            },
+            [$blankCharStart, $blankCharEnd]
+        );
+        $listAnswerResults['words'] = $listWords[0];
+    }
+
+    // Get all common words
+    $commonWords = api_preg_replace(
+        '/'.$blankCharStartForRegexp.'[^'.$blankCharEndForRegexp.']*'.$blankCharEndForRegexp.'/',
+        '::',
+        $listDoubleColon[0]
+    );
+    $listAnswerResults['common_words'] = explode('::', $commonWords);
+
+    return $listAnswerResults;
+}
+
+/**
+ * Escapes text used for question type Fill in the blanks.
+ *
+ * @param $inChar
+ *
+ * @return mixed|string
+ */
+function escapeForRegexp($inChar)
+{
+    $listChars = [
+        ".",
+        "+",
+        "*",
+        "?",
+        "[",
+        "^",
+        "]",
+        "$",
+        "(",
+        ")",
+        "{",
+        "}",
+        "=",
+        "!",
+        ">",
+        "|",
+        ":",
+        "-",
+        ")",
+    ];
+
+    if (in_array($inChar, $listChars)) {
+        return "\\".$inChar;
+    } else {
+        return $inChar;
+    }
+}
+
+/**
+ * Clear the answer entered.
+ *
+ * @param string $answer
+ *
+ * @return string
+ */
+function clearStudentAnswer($answer)
+{
+    $answer = api_html_entity_decode($answer);
+    $answer = api_preg_replace('/\s\s+/', ' ', $answer); // replace excess white spaces
+    $answer = str_replace('&#39;', '&#039;', $answer);
+    $answer = strtr($answer, array_flip(get_html_translation_table(HTML_ENTITIES, ENT_QUOTES)));
+
+    return trim($answer);
+}
+
+/**
+ * Remove all html tag.
+ *
+ * @param string $string The string to be stripped of HTML
+ *
+ * @return string clean of html tag
+ */
+function removeHtml($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("&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;
+}
+
+/**
+ * Remove all html tag.
+ *
+ * @param string $string The string to be stripped of accents
+ *
+ * @return string clean of html tag
+ */
+function removeQuotes($string)
+{
+    $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;
+}

plugin/test2pdf/src/test2pdf_plugin.class.php

@@ -0,0 +1,77 @@
+<?php
+/**
+ * Plugin class for the Test2Pdf plugin.
+ *
+ * @package chamilo.plugin.test2pdf
+ *
+ * @author Jose Angel Ruiz <desarrollo@nosolored.com>
+ */
+class Test2pdfPlugin extends Plugin
+{
+    public $isCoursePlugin = true;
+
+    protected function __construct()
+    {
+        parent::__construct(
+            '1.0',
+            'Jose Angel Ruiz - NoSoloRed (original author)',
+            [
+                'enable_plugin' => 'boolean',
+            ]
+        );
+    }
+
+    /**
+     * @return StaticPlugin
+     */
+    public static function create()
+    {
+        static $result = null;
+
+        return $result ? $result : $result = new self();
+    }
+
+    /**
+     * This method creates the tables required to this plugin.
+     */
+    public function install()
+    {
+        //Installing course settings
+        $this->setCourseToolDefaultVisibility(false);
+        $this->install_course_fields_in_all_courses();
+
+        $list = [
+            '/64/test2pdf.png',
+            '/64/test2pdf_na.png',
+            '/32/test2pdf.png',
+            '/32/test2pdf_na.png',
+            '/22/test2pdf.png',
+        ];
+
+        $res = true;
+        foreach ($list as $file) {
+            $source = __DIR__.'/../resources/img/'.$file;
+            $destination = __DIR__.'/../../../main/img/icons/'.$file;
+            $res = @copy($source, $destination);
+            if (!$res) {
+                break;
+            }
+        }
+
+        if (!$res) {
+            $warning = 'Test2PDF plugin icons could not be copied to main/img/ because of folder permissions. 
+            To fix, give web server user permissions to write to main/img/ before enabling this plugin.';
+            Display::addFlash(Display::return_message($warning, 'warning'));
+        }
+    }
+
+    /**
+     * This method drops the plugin tables.
+     */
+    public function uninstall()
+    {
+        // Deleting course settings.
+        $this->uninstall_course_fields_in_all_courses($this->course_settings);
+        $this->manageTab(false);
+    }
+}

plugin/test2pdf/src/view-pdf.php

@@ -0,0 +1,35 @@
+<?php
+/* For license terms, see /license.txt */
+/**
+ * Configuration script for the Test to Pdf plugin.
+ *
+ * @package chamilo.plugin.test2pdf
+ */
+require_once '../config.php';
+api_protect_course_script(true);
+
+$plugin = Test2pdfPlugin::create();
+$enable = $plugin->get('enable_plugin') == 'true';
+
+if ($enable) {
+    $templateName = $plugin->get_lang('ViewExercises');
+    $tpl = new Template($templateName);
+    $courseId = api_get_course_int_id();
+    $sessionId = api_get_session_id();
+
+    $infoExercise = showExerciseCourse($courseId, $sessionId);
+    $tpl->assign('infoExercise', $infoExercise);
+    $tpl->assign('course_id', $courseId);
+
+    $listing_tpl = 'test2pdf/view/view-pdf.tpl';
+    $content = $tpl->fetch($listing_tpl);
+    $tpl->assign('content', $content);
+    $tpl->display_one_col_template();
+} else {
+    Display::addFlash(Display::return_message($plugin->get_lang('PluginDisabledFromAdminPanel')));
+    header(
+        'Location:'.api_get_path(WEB_PATH).'courses/'.
+        api_get_course_id().'/index.php?id_session='.api_get_session_id()
+    );
+    exit;
+}

plugin/test2pdf/start.php

@@ -0,0 +1,28 @@
+<?php
+/* For license terms, see /license.txt */
+
+/**
+ * This script initiates a test2pdf plugin.
+ *
+ * @package chamilo.plugin.test2pdf
+ */
+require_once __DIR__.'/../../vendor/autoload.php';
+
+$course_plugin = 'test2pdf'; //needed in order to load the plugin lang variables
+require_once __DIR__.'/config.php';
+
+$tool_name = get_lang('Test2pdf');
+
+$plugin = Test2pdfPlugin::create();
+$enable = $plugin->get('enable_plugin') == 'true';
+
+if ($enable) {
+    $url = 'src/view-pdf.php?'.api_get_cidreq();
+    header('Location: '.$url);
+    exit;
+} else {
+    Display::addFlash(Display::return_message($plugin->get_lang('PluginDisabledFromAdminPanel')));
+    $url = api_get_path(WEB_PATH).'courses/'.api_get_course_id().'/index.php?id_session='.api_get_session_id();
+    header('Location:'.$url);
+    exit;
+}

plugin/test2pdf/uninstall.php

@@ -0,0 +1,14 @@
+<?php
+/* For license terms, see /license.txt */
+/**
+ * This script is included by main/admin/settings.lib.php when unselecting a plugin
+ * and is meant to remove things installed by the install.php script in both
+ * the global database and the courses tables.
+ *
+ * @package chamilo.plugin.test2pdf
+ */
+/**
+ * Queries.
+ */
+require_once __DIR__.'/config.php';
+Test2pdfPlugin::create()->uninstall();

plugin/test2pdf/view/view-pdf.tpl

@@ -0,0 +1,44 @@
+<link rel="stylesheet" type="text/css" href="../resources/css/style.css"/>
+
+<div class="row">
+    <div class="col-xs-12 col-md-12">
+    {% if infoExercise|length > 0 %}
+    	<input type="hidden" id="course_id" value="{{course_id}}" />
+        <table id="courses_table" class="table table-hover table-striped data_table table">
+            <tr class="row_odd">
+                <th class="th-header">{{ 'Exercise'|get_plugin_lang('Test2pdfPlugin') }}</th>
+                <th class="th-header text-center">{{ 'DownloadOnlyQuestion'|get_plugin_lang('Test2pdfPlugin') }}</th>
+                <th class="th-header text-center">{{ 'DownloadOnlyAnswer'|get_plugin_lang('Test2pdfPlugin') }}</th>
+                <th class="th-header text-center">{{ 'DownloadAll'|get_plugin_lang('Test2pdfPlugin') }}</th>
+            </tr>
+            {% set i = 0 %}
+
+            {% for item in infoExercise %}
+                {{ i%2 == 0 ? '<tr class="row_even">' : '<tr class="row_odd">' }}
+                    
+                    <td class="valign-middle">
+                    &nbsp;&nbsp;&nbsp;<img src="{{ 'quiz.png'|icon(32) }}">
+                    <strong>{{ item.title }}</strong>
+                    </td>
+                    <td class="text-center">
+                    	<a target="_blank" href="download-pdf.php?type=question&c_id={{course_id}}&id_quiz={{item.iid}}" title="{{ 'DownloadOnlyQuestion'|get_plugin_lang('Test2pdfPlugin') }}"><img src="{{ 'pdf.png'|icon(32) }}" /></a>
+                    </td>
+                    <td class="text-center">
+                    	<a target="_blank" href="download-pdf.php?type=answer&c_id={{course_id}}&id_quiz={{item.iid}}" title="{{ 'DownloadOnlyAnswer'|get_plugin_lang('Test2pdfPlugin') }}"><img src="{{ 'pdf.png'|icon(32) }}" /></a>
+                    </td>
+                    <td class="text-center">
+                    	<a target="_blank" href="download-pdf.php?type=all&c_id={{course_id}}&id_quiz={{item.iid}}" title="{{ 'DownloadAll'|get_plugin_lang('Test2pdfPlugin') }}"><img src="{{ 'pdf.png'|icon(32) }}" /></a>
+                    </td>
+                </tr>
+                {% set i = i + 1 %}
+            {% endfor %}
+        </table>
+    
+    {% else %}
+        <div class="alert alert-warning">
+            {{ 'NoExercise'|get_plugin_lang('Test2pdfPlugin') }}
+        </div>
+    {% endif %}
+	</div>
+	<div class="cleared"></div>
+</div>