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1379 lines
52 KiB
1379 lines
52 KiB
<?php
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/* For licensing terms, see /license.txt */
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/**
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* Class FillBlanks
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*
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* @author Eric Marguin
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* @author Julio Montoya multiple fill in blank option added
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* @package chamilo.exercise
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**/
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class FillBlanks extends Question
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{
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const FILL_THE_BLANK_STANDARD = 0;
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const FILL_THE_BLANK_MENU = 1;
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const FILL_THE_BLANK_SEVERAL_ANSWER = 2;
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public static $typePicture = 'fill_in_blanks.png';
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public static $explanationLangVar = 'FillBlanks';
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/**
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* Constructor
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*/
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public function __construct()
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{
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parent::__construct();
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$this->type = FILL_IN_BLANKS;
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$this->isContent = $this->getIsContent();
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}
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/**
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* @inheritdoc
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*/
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public function createAnswersForm($form)
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{
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$defaults = [];
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if (!empty($this->id)) {
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$objectAnswer = new Answer($this->id);
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$answer = $objectAnswer->selectAnswer(1);
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$listAnswersInfo = self::getAnswerInfo($answer);
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if ($listAnswersInfo['switchable']) {
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$defaults['multiple_answer'] = 1;
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} else {
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$defaults['multiple_answer'] = 0;
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}
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// Take the complete string except after the last '::'
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$defaults['answer'] = $listAnswersInfo['text'];
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$defaults['select_separator'] = $listAnswersInfo['blank_separator_number'];
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$blankSeparatorNumber = $listAnswersInfo['blank_separator_number'];
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} else {
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$defaults['answer'] = get_lang('DefaultTextInBlanks');
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$defaults['select_separator'] = 0;
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$blankSeparatorNumber = 0;
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}
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$blankSeparatorStart = self::getStartSeparator($blankSeparatorNumber);
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$blankSeparatorEnd = self::getEndSeparator($blankSeparatorNumber);
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$setWeightAndSize = '';
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if (isset($listAnswersInfo) && count($listAnswersInfo['weighting']) > 0) {
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foreach ($listAnswersInfo['weighting'] as $i => $weighting) {
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$setWeightAndSize .= 'document.getElementById("weighting['.$i.']").value = "'.$weighting.'";';
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}
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foreach ($listAnswersInfo['input_size'] as $i => $sizeOfInput) {
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$setWeightAndSize .= 'document.getElementById("sizeofinput['.$i.']").value = "'.$sizeOfInput.'";';
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$setWeightAndSize .= 'document.getElementById("samplesize['.$i.']").style.width = "'.$sizeOfInput.'px";';
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}
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}
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echo '<script>
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var firstTime = true;
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var originalOrder = new Array();
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var blankSeparatorStart = "'.$blankSeparatorStart.'";
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var blankSeparatorEnd = "'.$blankSeparatorEnd.'";
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var blankSeparatorStartRegexp = getBlankSeparatorRegexp(blankSeparatorStart);
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var blankSeparatorEndRegexp = getBlankSeparatorRegexp(blankSeparatorEnd);
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var blanksRegexp = "/"+blankSeparatorStartRegexp+"[^"+blankSeparatorStartRegexp+"]*"+blankSeparatorEndRegexp+"/g";
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CKEDITOR.on("instanceCreated", function(e) {
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if (e.editor.name === "answer") {
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//e.editor.on("change", updateBlanks);
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e.editor.on("change", function(){
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updateBlanks();
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});
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}
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});
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function updateBlanks()
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{
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var answer;
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if (firstTime) {
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var field = document.getElementById("answer");
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answer = field.value;
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} else {
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answer = CKEDITOR.instances["answer"].getData();
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}
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// disable the save button, if not blanks have been created
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$("button").attr("disabled", "disabled");
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$("#defineoneblank").show();
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var blanks = answer.match(eval(blanksRegexp));
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var fields = "<div class=\"form-group \">";
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fields += "<label class=\"col-sm-2 control-label\"></label>";
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fields += "<div class=\"col-sm-8\">";
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fields += "<table class=\"data_table\">";
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fields += "<tr><th style=\"width:220px\">'.get_lang("WordTofind").'</th>";
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fields += "<th style=\"width:50px\">'.get_lang("QuestionWeighting").'</th>";
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fields += "<th>'.get_lang("BlankInputSize").'</th></tr>";
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if (blanks != null) {
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for (var i=0; i < blanks.length; i++) {
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// remove forbidden characters that causes bugs
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blanks[i] = removeForbiddenChars(blanks[i]);
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// trim blanks between brackets
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blanks[i] = trimBlanksBetweenSeparator(blanks[i], blankSeparatorStart, blankSeparatorEnd);
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// if the word is empty []
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if (blanks[i] == blankSeparatorStartRegexp+blankSeparatorEndRegexp) {
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break;
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}
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// get input size
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var inputSize = 100;
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var textValue = blanks[i].substr(1, blanks[i].length - 2);
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var btoaValue = textValue.hashCode();
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if (firstTime == false) {
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var element = document.getElementById("samplesize["+i+"]");
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if (element) {
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inputSize = document.getElementById("sizeofinput["+i+"]").value;
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}
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}
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if (document.getElementById("weighting["+i+"]")) {
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var value = document.getElementById("weighting["+i+"]").value;
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} else {
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var value = "1";
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}
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var blanksWithColor = trimBlanksBetweenSeparator(blanks[i], blankSeparatorStart, blankSeparatorEnd, 1);
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fields += "<tr>";
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fields += "<td>"+blanksWithColor+"</td>";
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fields += "<td><input class=\"form-control\" style=\"width:60px\" value=\""+value+"\" type=\"text\" id=\"weighting["+i+"]\" name=\"weighting["+i+"]\" /></td>";
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fields += "<td>";
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fields += "<input class=\"btn btn-default\" type=\"button\" value=\"-\" onclick=\"changeInputSize(-1, "+i+")\"> ";
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fields += "<input class=\"btn btn-default\" type=\"button\" value=\"+\" onclick=\"changeInputSize(1, "+i+")\"> ";
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fields += " <input class=\"sample\" id=\"samplesize["+i+"]\" data-btoa=\""+btoaValue+"\" type=\"text\" value=\""+textValue+"\" style=\"width:"+inputSize+"px\" disabled=disabled />";
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fields += "<input id=\"sizeofinput["+i+"]\" type=\"hidden\" value=\""+inputSize+"\" name=\"sizeofinput["+i+"]\" />";
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fields += "</td>";
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fields += "</tr>";
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// enable the save button
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$("button").removeAttr("disabled");
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$("#defineoneblank").hide();
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}
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}
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document.getElementById("blanks_weighting").innerHTML = fields + "</table></div></div>";
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$(originalOrder).each(function(i, data) {
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if (firstTime == false) {
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value = data.value;
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var d = $("input.sample[data-btoa=\'"+value+"\']");
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var id = d.attr("id");
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if (id) {
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var sizeInputId = id.replace("samplesize", "sizeofinput");
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var sizeInputId = sizeInputId.replace("[", "\\\[");
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var sizeInputId = sizeInputId.replace("]", "\\\]");
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$("#"+sizeInputId).val(data.width);
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d.outerWidth(data.width+"px");
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}
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}
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});
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updateOrder(blanks);
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if (firstTime) {
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firstTime = false;
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'.$setWeightAndSize.'
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}
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}
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window.onload = updateBlanks;
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String.prototype.hashCode = function() {
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var hash = 0, i, chr, len;
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if (this.length === 0) return hash;
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for (i = 0, len = this.length; i < len; i++) {
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chr = this.charCodeAt(i);
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hash = ((hash << 5) - hash) + chr;
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hash |= 0; // Convert to 32bit integer
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}
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return hash;
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};
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function updateOrder(blanks)
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{
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originalOrder = new Array();
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if (blanks != null) {
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for (var i=0; i < blanks.length; i++) {
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// remove forbidden characters that causes bugs
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blanks[i] = removeForbiddenChars(blanks[i]);
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// trim blanks between brackets
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blanks[i] = trimBlanksBetweenSeparator(blanks[i], blankSeparatorStart, blankSeparatorEnd);
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// if the word is empty []
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if (blanks[i] == blankSeparatorStartRegexp+blankSeparatorEndRegexp) {
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break;
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}
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var textValue = blanks[i].substr(1, blanks[i].length - 2);
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var btoaValue = textValue.hashCode();
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if (firstTime == false) {
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var element = document.getElementById("samplesize["+i+"]");
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if (element) {
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inputSize = document.getElementById("sizeofinput["+i+"]").value;
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originalOrder.push({ "width" : inputSize, "value": btoaValue });
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}
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}
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}
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}
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}
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function changeInputSize(coef, inIdNum)
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{
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if (firstTime) {
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var field = document.getElementById("answer");
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answer = field.value;
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} else {
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answer = CKEDITOR.instances["answer"].getData();
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}
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var blanks = answer.match(eval(blanksRegexp));
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var currentWidth = $("#samplesize\\\["+inIdNum+"\\\]").width();
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var newWidth = currentWidth + coef * 20;
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newWidth = Math.max(20, newWidth);
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newWidth = Math.min(newWidth, 600);
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$("#samplesize\\\["+inIdNum+"\\\]").outerWidth(newWidth);
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$("#sizeofinput\\\["+inIdNum+"\\\]").attr("value", newWidth);
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updateOrder(blanks);
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}
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function removeForbiddenChars(inTxt)
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{
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outTxt = inTxt;
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outTxt = outTxt.replace(/"/g, ""); // remove the char
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outTxt = outTxt.replace(/\x22/g, ""); // remove the char
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outTxt = outTxt.replace(/"/g, ""); // remove the char
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outTxt = outTxt.replace(/\\\\/g, ""); // remove the \ char
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outTxt = outTxt.replace(/ /g, " ");
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outTxt = outTxt.replace(/^ +/, "");
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outTxt = outTxt.replace(/ +$/, "");
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return outTxt;
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}
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function changeBlankSeparator()
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{
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var separatorNumber = $("#select_separator").val();
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var tabSeparator = getSeparatorFromNumber(separatorNumber);
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blankSeparatorStart = tabSeparator[0];
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blankSeparatorEnd = tabSeparator[1];
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blankSeparatorStartRegexp = getBlankSeparatorRegexp(blankSeparatorStart);
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blankSeparatorEndRegexp = getBlankSeparatorRegexp(blankSeparatorEnd);
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blanksRegexp = "/"+blankSeparatorStartRegexp+"[^"+blankSeparatorStartRegexp+"]*"+blankSeparatorEndRegexp+"/g";
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updateBlanks();
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}
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// this function is the same than the PHP one
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// if modify it modify the php one escapeForRegexp
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function getBlankSeparatorRegexp(inTxt)
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{
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var tabSpecialChar = new Array(".", "+", "*", "?", "[", "^", "]", "$", "(", ")",
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"{", "}", "=", "!", "<", ">", "|", ":", "-", ")");
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for (var i=0; i < tabSpecialChar.length; i++) {
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if (inTxt == tabSpecialChar[i]) {
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return "\\\"+inTxt;
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}
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}
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return inTxt;
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}
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// this function is the same than the PHP one
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// if modify it modify the php one getAllowedSeparator
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function getSeparatorFromNumber(number)
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{
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var separator = new Array();
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separator[0] = new Array("[", "]");
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separator[1] = new Array("{", "}");
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separator[2] = new Array("(", ")");
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separator[3] = new Array("*", "*");
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separator[4] = new Array("#", "#");
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separator[5] = new Array("%", "%");
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separator[6] = new Array("$", "$");
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return separator[number];
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}
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function trimBlanksBetweenSeparator(inTxt, inSeparatorStart, inSeparatorEnd, addColor)
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{
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var result = inTxt
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result = result.replace(inSeparatorStart, "");
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result = result.replace(inSeparatorEnd, "");
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result = result.trim();
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if (addColor == 1) {
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var resultParts = result.split("|");
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var partsToString = "";
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resultParts.forEach(function(item, index) {
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if (index == 0) {
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item = "<b><font style=\"color:green\"> " + item +"</font></b>";
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}
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if (index < resultParts.length - 1) {
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item = item + " | ";
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}
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partsToString += item;
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});
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result = partsToString;
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}
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return inSeparatorStart+result+inSeparatorEnd;
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}
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</script>';
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// answer
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$form->addLabel(
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null,
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get_lang('TypeTextBelow').', '.get_lang('And').' '.get_lang('UseTagForBlank')
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);
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$form->addElement(
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'html_editor',
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'answer',
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Display::return_icon('fill_field.png'),
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['id' => 'answer'],
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['ToolbarSet' => 'TestQuestionDescription']
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);
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$form->addRule('answer', get_lang('GiveText'), 'required');
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//added multiple answers
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$form->addElement('checkbox', 'multiple_answer', '', get_lang('FillInBlankSwitchable'));
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$form->addElement(
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'select',
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'select_separator',
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get_lang('SelectFillTheBlankSeparator'),
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self::getAllowedSeparatorForSelect(),
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' id="select_separator" style="width:150px" class="selectpicker" onchange="changeBlankSeparator()" '
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);
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$form->addLabel(
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null,
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'<input type="button" onclick="updateBlanks()" value="'.get_lang('RefreshBlanks').'" class="btn btn-default" />'
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);
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$form->addHtml('<div id="blanks_weighting"></div>');
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global $text;
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// setting the save button here and not in the question class.php
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$form->addHtml('<div id="defineoneblank" style="color:#D04A66; margin-left:160px">'.get_lang('DefineBlanks').'</div>');
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$form->addButtonSave($text, 'submitQuestion');
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if (!empty($this->id)) {
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$form->setDefaults($defaults);
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} else {
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if ($this->isContent == 1) {
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$form->setDefaults($defaults);
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}
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}
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}
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/**
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* @inheritdoc
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*/
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public function processAnswersCreation($form, $exercise)
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{
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$answer = $form->getSubmitValue('answer');
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// Due the ckeditor transform the elements to their HTML value
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//$answer = api_html_entity_decode($answer, ENT_QUOTES, $charset);
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//$answer = htmlentities(api_utf8_encode($answer));
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// remove the "::" eventually written by the user
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$answer = str_replace('::', '', $answer);
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// remove starting and ending space and
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$answer = api_preg_replace("/\xc2\xa0/", " ", $answer);
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// start and end separator
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$blankStartSeparator = self::getStartSeparator($form->getSubmitValue('select_separator'));
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$blankEndSeparator = self::getEndSeparator($form->getSubmitValue('select_separator'));
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$blankStartSeparatorRegexp = self::escapeForRegexp($blankStartSeparator);
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$blankEndSeparatorRegexp = self::escapeForRegexp($blankEndSeparator);
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// remove spaces at the beginning and the end of text in square brackets
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$answer = preg_replace_callback(
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"/".$blankStartSeparatorRegexp."[^]]+".$blankEndSeparatorRegexp."/",
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function ($matches) use ($blankStartSeparator, $blankEndSeparator) {
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$matchingResult = $matches[0];
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$matchingResult = trim($matchingResult, $blankStartSeparator);
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$matchingResult = trim($matchingResult, $blankEndSeparator);
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$matchingResult = trim($matchingResult);
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// remove forbidden chars
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$matchingResult = str_replace("/\\/", "", $matchingResult);
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$matchingResult = str_replace('/"/', "", $matchingResult);
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return $blankStartSeparator.$matchingResult.$blankEndSeparator;
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},
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$answer
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);
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// get the blanks weightings
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$nb = preg_match_all(
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'/'.$blankStartSeparatorRegexp.'[^'.$blankStartSeparatorRegexp.']*'.$blankEndSeparatorRegexp.'/',
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$answer,
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$blanks
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);
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if (isset($_GET['editQuestion'])) {
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$this->weighting = 0;
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}
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/* if we have some [tobefound] in the text
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build the string to save the following in the answers table
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<p>I use a [computer] and a [pen].</p>
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becomes
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<p>I use a [computer] and a [pen].</p>::100,50:100,50@1
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++++++++-------**
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--- -- --- -- -
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A B (C) (D)(E)
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+++++++ : required, weighting of each words
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------- : optional, input width to display, 200 if not present
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** : equal @1 if "Allow answers order switches" has been checked, @ otherwise
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A : weighting for the word [computer]
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B : weighting for the word [pen]
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C : input width for the word [computer]
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D : input width for the word [pen]
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E : equal @1 if "Allow answers order switches" has been checked, @ otherwise
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*/
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if ($nb > 0) {
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$answer .= '::';
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// weighting
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for ($i = 0; $i < $nb; ++$i) {
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// enter the weighting of word $i
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$answer .= $form->getSubmitValue('weighting['.$i.']');
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// not the last word, add ","
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if ($i != $nb - 1) {
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$answer .= ",";
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}
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// calculate the global weighting for the question
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$this->weighting += (float) $form->getSubmitValue('weighting['.$i.']');
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}
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// input width
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$answer .= ":";
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for ($i = 0; $i < $nb; ++$i) {
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// enter the width of input for word $i
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$answer .= $form->getSubmitValue('sizeofinput['.$i.']');
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// not the last word, add ","
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if ($i != $nb - 1) {
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$answer .= ",";
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}
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}
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}
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// write the blank separator code number
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// see function getAllowedSeparator
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/*
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0 [...]
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1 {...}
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2 (...)
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3 *...*
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4 #...#
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5 %...%
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6 $...$
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*/
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$answer .= ":".$form->getSubmitValue('select_separator');
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// Allow answers order switches
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$is_multiple = $form -> getSubmitValue('multiple_answer');
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$answer .= '@'.$is_multiple;
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$this->save($exercise);
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$objAnswer = new Answer($this->id);
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$objAnswer->createAnswer($answer, 0, '', 0, 1);
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$objAnswer->save();
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}
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/**
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* @inheritdoc
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*/
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public function return_header($exercise, $counter = null, $score = null)
|
|
{
|
|
$header = parent::return_header($exercise, $counter, $score);
|
|
$header .= '<table class="'.$this->question_table_class.'">
|
|
<tr>
|
|
<th>'.get_lang("Answer").'</th>
|
|
</tr>';
|
|
|
|
return $header;
|
|
}
|
|
|
|
/**
|
|
* @param int $currentQuestion
|
|
* @param int $questionId
|
|
* @param string $correctItem
|
|
* @param array $attributes
|
|
* @param string $answer
|
|
* @param array $listAnswersInfo
|
|
* @param boolean $displayForStudent
|
|
* @param int $inBlankNumber
|
|
* @return string
|
|
*/
|
|
public static function getFillTheBlankHtml(
|
|
$currentQuestion,
|
|
$questionId,
|
|
$correctItem,
|
|
$attributes,
|
|
$answer,
|
|
$listAnswersInfo,
|
|
$displayForStudent,
|
|
$inBlankNumber
|
|
) {
|
|
$inTabTeacherSolution = $listAnswersInfo['words'];
|
|
$inTeacherSolution = $inTabTeacherSolution[$inBlankNumber];
|
|
|
|
switch (self::getFillTheBlankAnswerType($inTeacherSolution)) {
|
|
case self::FILL_THE_BLANK_MENU:
|
|
$selected = '';
|
|
// the blank menu
|
|
// display a menu from answer separated with |
|
|
// if display for student, shuffle the correct answer menu
|
|
$listMenu = self::getFillTheBlankMenuAnswers(
|
|
$inTeacherSolution,
|
|
$displayForStudent
|
|
);
|
|
|
|
$resultOptions = ['' => '--'];
|
|
foreach ($listMenu as $item) {
|
|
$resultOptions[sha1($item)] = $item;
|
|
}
|
|
|
|
//var_dump($resultOptions, $correctItem);
|
|
|
|
foreach ($resultOptions as $key => $value) {
|
|
if ($correctItem == $value) {
|
|
$selected = $key;
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
$result = Display::select(
|
|
"choice[$questionId][]",
|
|
$resultOptions,
|
|
$selected,
|
|
['class' => 'selectpicker'],
|
|
false
|
|
);
|
|
break;
|
|
case self::FILL_THE_BLANK_SEVERAL_ANSWER:
|
|
case self::FILL_THE_BLANK_STANDARD:
|
|
default:
|
|
$attributes['id'] = 'choice_id_'.$currentQuestion.'_'.$inBlankNumber;
|
|
$result = Display::input(
|
|
'text',
|
|
"choice[$questionId][]",
|
|
$correctItem,
|
|
$attributes
|
|
);
|
|
break;
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Removes double spaces between words
|
|
* @param string $text
|
|
* @return string
|
|
*/
|
|
private static function trimOption($text)
|
|
{
|
|
$text = trim($text);
|
|
$text = preg_replace("/\s+/", " ", $text);
|
|
|
|
return $text;
|
|
}
|
|
|
|
/**
|
|
* Return an array with the different choices available
|
|
* when the answers between bracket show as a menu
|
|
* @param string $correctAnswer
|
|
* @param bool $displayForStudent true if we want to shuffle the choices of the menu for students
|
|
*
|
|
* @return array
|
|
*/
|
|
public static function getFillTheBlankMenuAnswers($correctAnswer, $displayForStudent)
|
|
{
|
|
$list = api_preg_split("/\|/", $correctAnswer);
|
|
foreach ($list as &$item) {
|
|
$item = self::trimOption($item);
|
|
$item = api_html_entity_decode($item);
|
|
}
|
|
// The list is always in the same order, there's no option to allow or disable shuffle options.
|
|
if ($displayForStudent) {
|
|
shuffle_assoc($list);
|
|
}
|
|
|
|
return $list;
|
|
}
|
|
|
|
/**
|
|
* Return the array index of the student answer
|
|
* @param string $correctAnswer the menu Choice1|Choice2|Choice3
|
|
* @param string $studentAnswer the student answer must be Choice1 or Choice2 or Choice3
|
|
*
|
|
* @return int in the example 0 1 or 2 depending of the choice of the student
|
|
*/
|
|
public static function getFillTheBlankMenuAnswerNum($correctAnswer, $studentAnswer)
|
|
{
|
|
$listChoices = self::getFillTheBlankMenuAnswers($correctAnswer, false);
|
|
foreach ($listChoices as $num => $value) {
|
|
if ($value == $studentAnswer) {
|
|
return $num;
|
|
}
|
|
}
|
|
|
|
// should not happened, because student choose the answer in a menu of possible answers
|
|
return -1;
|
|
}
|
|
|
|
|
|
/**
|
|
* Return the possible answer if the answer between brackets is a multiple choice menu
|
|
* @param string $correctAnswer
|
|
*
|
|
* @return array
|
|
*/
|
|
public static function getFillTheBlankSeveralAnswers($correctAnswer)
|
|
{
|
|
// is answer||Answer||response||Response , mean answer or Answer ...
|
|
$listSeveral = api_preg_split("/\|\|/", $correctAnswer);
|
|
|
|
return $listSeveral;
|
|
}
|
|
|
|
/**
|
|
* Return true if student answer is right according to the correctAnswer
|
|
* it is not as simple as equality, because of the type of Fill The Blank question
|
|
* eg : studentAnswer = 'Un' and correctAnswer = 'Un||1||un'
|
|
* @param string $studentAnswer [student_answer] of the info array of the answer field
|
|
* @param string $correctAnswer [words] of the info array of the answer field
|
|
* @param bool $fromDatabase
|
|
* @return bool
|
|
*/
|
|
public static function isStudentAnswerGood($studentAnswer, $correctAnswer, $fromDatabase = false)
|
|
{
|
|
$result = false;
|
|
switch (self::getFillTheBlankAnswerType($correctAnswer)) {
|
|
case self::FILL_THE_BLANK_MENU:
|
|
$listMenu = self::getFillTheBlankMenuAnswers($correctAnswer, false);
|
|
if ($studentAnswer != '' && isset($listMenu[0])) {
|
|
// First item is always the correct one.
|
|
$item = $listMenu[0];
|
|
if (!$fromDatabase) {
|
|
$item = sha1($item);
|
|
}
|
|
if ($item === $studentAnswer) {
|
|
$result = true;
|
|
}
|
|
}
|
|
break;
|
|
case self::FILL_THE_BLANK_SEVERAL_ANSWER:
|
|
// the answer must be one of the choice made
|
|
$listSeveral = self::getFillTheBlankSeveralAnswers($correctAnswer);
|
|
$listSeveral = array_map(
|
|
function ($item) {
|
|
return self::trimOption($item);
|
|
},
|
|
$listSeveral
|
|
);
|
|
$result = in_array($studentAnswer, $listSeveral);
|
|
break;
|
|
case self::FILL_THE_BLANK_STANDARD:
|
|
default:
|
|
$correctAnswer = api_html_entity_decode($correctAnswer);
|
|
$studentAnswer = htmlspecialchars($studentAnswer);
|
|
$result = $studentAnswer == self::trimOption($correctAnswer);
|
|
|
|
|
|
break;
|
|
}
|
|
//var_dump($result);
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* @param string $correctAnswer
|
|
*
|
|
* @return int
|
|
*/
|
|
public static function getFillTheBlankAnswerType($correctAnswer)
|
|
{
|
|
if (api_strpos($correctAnswer, '|') && !api_strpos($correctAnswer, '||')) {
|
|
return self::FILL_THE_BLANK_MENU;
|
|
} elseif (api_strpos($correctAnswer, '||')) {
|
|
return self::FILL_THE_BLANK_SEVERAL_ANSWER;
|
|
} else {
|
|
return self::FILL_THE_BLANK_STANDARD;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return information about the answer
|
|
* @param string $userAnswer the text of the answer of the question
|
|
* @param bool $isStudentAnswer true if it's a student answer false the empty question model
|
|
*
|
|
* @return array of information about the answer
|
|
*/
|
|
public static function getAnswerInfo($userAnswer = '', $isStudentAnswer = false)
|
|
{
|
|
$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", $userAnswer, $listResult);
|
|
|
|
if (count($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];
|
|
}
|
|
|
|
$listAnswerResults['text'] = $listDoubleColon[0];
|
|
$listAnswerResults['weighting'] = $listWeightings;
|
|
$listAnswerResults['input_size'] = $listSizeOfInput;
|
|
$listAnswerResults['switchable'] = $listArobaseSplit[1];
|
|
$listAnswerResults['blank_separator_start'] = self::getStartSeparator($blankSeparatorNumber);
|
|
$listAnswerResults['blank_separator_end'] = self::getEndSeparator($blankSeparatorNumber);
|
|
$listAnswerResults['blank_separator_number'] = $blankSeparatorNumber;
|
|
|
|
$blankCharStart = self::getStartSeparator($blankSeparatorNumber);
|
|
$blankCharEnd = self::getEndSeparator($blankSeparatorNumber);
|
|
$blankCharStartForRegexp = self::escapeForRegexp($blankCharStart);
|
|
$blankCharEndForRegexp = self::escapeForRegexp($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, $trimChars);
|
|
},
|
|
[$blankCharStart, $blankCharEnd]
|
|
);
|
|
$listAnswerResults['words'] = $listWords[0];
|
|
}
|
|
|
|
// Get all common words
|
|
$commonWords = api_preg_replace(
|
|
'/'.$blankCharStartForRegexp.'[^'.$blankCharEndForRegexp.']*'.$blankCharEndForRegexp.'/',
|
|
"::",
|
|
$listDoubleColon[0]
|
|
);
|
|
|
|
// if student answer, the second [] is the student answer,
|
|
// the third is if student scored or not
|
|
$listBrackets = [];
|
|
$listWords = [];
|
|
if ($isStudentAnswer) {
|
|
for ($i = 0; $i < count($listAnswerResults['words']); $i++) {
|
|
$listBrackets[] = $listAnswerResults['words_with_bracket'][$i];
|
|
$listWords[] = $listAnswerResults['words'][$i];
|
|
if ($i + 1 < count($listAnswerResults['words'])) {
|
|
// should always be
|
|
$i++;
|
|
}
|
|
$listAnswerResults['student_answer'][] = $listAnswerResults['words'][$i];
|
|
if ($i + 1 < count($listAnswerResults['words'])) {
|
|
// should always be
|
|
$i++;
|
|
}
|
|
$listAnswerResults['student_score'][] = $listAnswerResults['words'][$i];
|
|
}
|
|
$listAnswerResults['words'] = $listWords;
|
|
$listAnswerResults['words_with_bracket'] = $listBrackets;
|
|
|
|
// if we are in student view, we've got 3 times :::::: for common words
|
|
$commonWords = api_preg_replace("/::::::/", "::", $commonWords);
|
|
}
|
|
|
|
$listAnswerResults['common_words'] = explode("::", $commonWords);
|
|
|
|
return $listAnswerResults;
|
|
}
|
|
|
|
/**
|
|
* Return an array of student state answers for fill the blank questions
|
|
* for each students that answered the question
|
|
* -2 : didn't answer
|
|
* -1 : student answer is wrong
|
|
* 0 : student answer is correct
|
|
* >0 : for fill the blank question with choice menu, is the index of the student answer (right answer indice is 0)
|
|
*
|
|
* @param integer $testId
|
|
* @param integer $questionId
|
|
* @param $studentsIdList
|
|
* @param string $startDate
|
|
* @param string $endDate
|
|
* @param bool $useLastAnsweredAttempt
|
|
* @return array
|
|
* (
|
|
* [student_id] => Array
|
|
* (
|
|
* [first fill the blank for question] => -1
|
|
* [second fill the blank for question] => 2
|
|
* [third fill the blank for question] => -1
|
|
* )
|
|
* )
|
|
*/
|
|
public static function getFillTheBlankTabResult(
|
|
$testId,
|
|
$questionId,
|
|
$studentsIdList,
|
|
$startDate,
|
|
$endDate,
|
|
$useLastAnsweredAttempt = true
|
|
) {
|
|
$tblTrackEAttempt = Database::get_main_table(TABLE_STATISTIC_TRACK_E_ATTEMPT);
|
|
$tblTrackEExercise = Database::get_main_table(TABLE_STATISTIC_TRACK_E_EXERCISES);
|
|
$courseId = api_get_course_int_id();
|
|
// If no user has answered questions, no need to go further. Return empty array.
|
|
if (empty($studentsIdList)) {
|
|
return [];
|
|
}
|
|
// request to have all the answers of student for this question
|
|
// student may have doing it several time
|
|
// student may have not answered the bracket id, in this case, is result of the answer is empty
|
|
// we got the less recent attempt first
|
|
$sql = 'SELECT * FROM '.$tblTrackEAttempt.' tea
|
|
LEFT JOIN '.$tblTrackEExercise.' tee
|
|
ON
|
|
tee.exe_id = tea.exe_id AND
|
|
tea.c_id = '.$courseId.' AND
|
|
exe_exo_id = '.$testId.'
|
|
WHERE
|
|
tee.c_id = '.$courseId.' AND
|
|
question_id = '.$questionId.' AND
|
|
tea.user_id IN ('.implode(',', $studentsIdList).') AND
|
|
tea.tms >= "'.$startDate.'" AND
|
|
tea.tms <= "'.$endDate.'"
|
|
ORDER BY user_id, tea.exe_id;
|
|
';
|
|
|
|
$res = Database::query($sql);
|
|
$tabUserResult = [];
|
|
// foreach attempts for all students starting with his older attempt
|
|
while ($data = Database::fetch_array($res)) {
|
|
$tabAnswer = self::getAnswerInfo($data['answer'], true);
|
|
|
|
// for each bracket to find in this question
|
|
foreach ($tabAnswer['student_answer'] as $bracketNumber => $studentAnswer) {
|
|
if ($tabAnswer['student_answer'][$bracketNumber] != '') {
|
|
// student has answered this bracket, cool
|
|
switch (self::getFillTheBlankAnswerType($tabAnswer['words'][$bracketNumber])) {
|
|
case self::FILL_THE_BLANK_MENU:
|
|
// get the indice of the choosen answer in the menu
|
|
// we know that the right answer is the first entry of the menu, ie 0
|
|
// (remember, menu entries are shuffled when taking the test)
|
|
$tabUserResult[$data['user_id']][$bracketNumber] = self::getFillTheBlankMenuAnswerNum(
|
|
$tabAnswer['words'][$bracketNumber],
|
|
$tabAnswer['student_answer'][$bracketNumber]
|
|
);
|
|
break;
|
|
default:
|
|
if (self::isStudentAnswerGood(
|
|
$tabAnswer['student_answer'][$bracketNumber],
|
|
$tabAnswer['words'][$bracketNumber]
|
|
)
|
|
) {
|
|
$tabUserResult[$data['user_id']][$bracketNumber] = 0; // right answer
|
|
} else {
|
|
$tabUserResult[$data['user_id']][$bracketNumber] = -1; // wrong answer
|
|
}
|
|
}
|
|
} else {
|
|
// student didn't answer this bracket
|
|
if ($useLastAnsweredAttempt) {
|
|
// if we take into account the last answered attempt
|
|
if (!isset($tabUserResult[$data['user_id']][$bracketNumber])) {
|
|
$tabUserResult[$data['user_id']][$bracketNumber] = -2; // not answered
|
|
}
|
|
} else {
|
|
// we take the last attempt, even if the student answer the question before
|
|
$tabUserResult[$data['user_id']][$bracketNumber] = -2; // not answered
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return $tabUserResult;
|
|
}
|
|
|
|
/**
|
|
* Return the number of student that give at leat an answer in the fill the blank test
|
|
* @param array $resultList
|
|
* @return int
|
|
*/
|
|
public static function getNbResultFillBlankAll($resultList)
|
|
{
|
|
$outRes = 0;
|
|
// for each student in group
|
|
foreach ($resultList as $userId => $tabValue) {
|
|
$found = false;
|
|
// for each bracket, if student has at least one answer ( choice > -2) then he pass the question
|
|
foreach ($tabValue as $i => $choice) {
|
|
if ($choice > -2 && !$found) {
|
|
$outRes++;
|
|
$found = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return $outRes;
|
|
}
|
|
|
|
/**
|
|
* Replace the occurrence of blank word with [correct answer][student answer][answer is correct]
|
|
* @param array $listWithStudentAnswer
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function getAnswerInStudentAttempt($listWithStudentAnswer)
|
|
{
|
|
$separatorStart = $listWithStudentAnswer['blank_separator_start'];
|
|
$separatorEnd = $listWithStudentAnswer['blank_separator_end'];
|
|
// lets rebuild the sentence with [correct answer][student answer][answer is correct]
|
|
$result = '';
|
|
for ($i = 0; $i < count($listWithStudentAnswer['common_words']) - 1; $i++) {
|
|
$result .= $listWithStudentAnswer['common_words'][$i];
|
|
$result .= $listWithStudentAnswer['words_with_bracket'][$i];
|
|
$result .= $separatorStart.$listWithStudentAnswer['student_answer'][$i].$separatorEnd;
|
|
$result .= $separatorStart.$listWithStudentAnswer['student_score'][$i].$separatorEnd;
|
|
}
|
|
$result .= $listWithStudentAnswer['common_words'][$i];
|
|
$result .= "::";
|
|
// add the system string
|
|
$result .= $listWithStudentAnswer['system_string'];
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* This function is the same than the js one above getBlankSeparatorRegexp
|
|
* @param string $inChar
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function escapeForRegexp($inChar)
|
|
{
|
|
$listChars = [
|
|
".",
|
|
"+",
|
|
"*",
|
|
"?",
|
|
"[",
|
|
"^",
|
|
"]",
|
|
"$",
|
|
"(",
|
|
")",
|
|
"{",
|
|
"}",
|
|
"=",
|
|
"!",
|
|
">",
|
|
"|",
|
|
":",
|
|
"-",
|
|
")",
|
|
];
|
|
|
|
if (in_array($inChar, $listChars)) {
|
|
return "\\".$inChar;
|
|
} else {
|
|
return $inChar;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* return $text protected for use in regexp
|
|
* @param string $text
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function getRegexpProtected($text)
|
|
{
|
|
$listRegexpCharacters = [
|
|
"/",
|
|
".",
|
|
"+",
|
|
"*",
|
|
"?",
|
|
"[",
|
|
"^",
|
|
"]",
|
|
"$",
|
|
"(",
|
|
")",
|
|
"{",
|
|
"}",
|
|
"=",
|
|
"!",
|
|
">",
|
|
"|",
|
|
":",
|
|
"-",
|
|
")",
|
|
];
|
|
$result = $text;
|
|
for ($i = 0; $i < count($listRegexpCharacters); $i++) {
|
|
$result = str_replace($listRegexpCharacters[$i], "\\".$listRegexpCharacters[$i], $result);
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* This function must be the same than the js one getSeparatorFromNumber above
|
|
* @return array
|
|
*/
|
|
public static function getAllowedSeparator()
|
|
{
|
|
return [
|
|
['[', ']'],
|
|
['{', '}'],
|
|
['(', ')'],
|
|
['*', '*'],
|
|
['#', '#'],
|
|
['%', '%'],
|
|
['$', '$'],
|
|
];
|
|
}
|
|
|
|
/**
|
|
* return the start separator for answer
|
|
* @param string $number
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function getStartSeparator($number)
|
|
{
|
|
$listSeparators = self::getAllowedSeparator();
|
|
|
|
return $listSeparators[$number][0];
|
|
}
|
|
|
|
/**
|
|
* return the end separator for answer
|
|
* @param string $number
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function getEndSeparator($number)
|
|
{
|
|
$listSeparators = self::getAllowedSeparator();
|
|
|
|
return $listSeparators[$number][1];
|
|
}
|
|
|
|
/**
|
|
* Return as a description text, array of allowed separators for question
|
|
* eg: array("[...]", "(...)")
|
|
* @return array
|
|
*/
|
|
public static function getAllowedSeparatorForSelect()
|
|
{
|
|
$listResults = [];
|
|
$allowedSeparator = self::getAllowedSeparator();
|
|
foreach ($allowedSeparator as $part) {
|
|
$listResults[] = $part[0]."...".$part[1];
|
|
}
|
|
|
|
return $listResults;
|
|
}
|
|
|
|
/**
|
|
* return the code number of the separator for the question
|
|
* @param string $startSeparator
|
|
* @param string $endSeparator
|
|
*
|
|
* @return int
|
|
*/
|
|
public function getDefaultSeparatorNumber($startSeparator, $endSeparator)
|
|
{
|
|
$listSeparators = self::getAllowedSeparator();
|
|
$result = 0;
|
|
for ($i = 0; $i < count($listSeparators); $i++) {
|
|
if ($listSeparators[$i][0] == $startSeparator &&
|
|
$listSeparators[$i][1] == $endSeparator
|
|
) {
|
|
$result = $i;
|
|
}
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* return the HTML display of the answer
|
|
* @param string $answer
|
|
* @param int $feedbackType
|
|
* @param bool $resultsDisabled
|
|
* @param bool $showTotalScoreAndUserChoices
|
|
* @return string
|
|
*/
|
|
public static function getHtmlDisplayForAnswer(
|
|
$answer,
|
|
$feedbackType,
|
|
$resultsDisabled = false,
|
|
$showTotalScoreAndUserChoices = false
|
|
) {
|
|
$result = '';
|
|
$listStudentAnswerInfo = self::getAnswerInfo($answer, true);
|
|
|
|
if ($resultsDisabled == RESULT_DISABLE_SHOW_SCORE_ATTEMPT_SHOW_ANSWERS_LAST_ATTEMPT) {
|
|
if ($showTotalScoreAndUserChoices) {
|
|
$resultsDisabled = false;
|
|
} else {
|
|
$resultsDisabled = true;
|
|
}
|
|
}
|
|
|
|
// rebuild the answer with good HTML style
|
|
// this is the student answer, right or wrong
|
|
for ($i = 0; $i < count($listStudentAnswerInfo['student_answer']); $i++) {
|
|
if ($listStudentAnswerInfo['student_score'][$i] == 1) {
|
|
$listStudentAnswerInfo['student_answer'][$i] = self::getHtmlRightAnswer(
|
|
$listStudentAnswerInfo['student_answer'][$i],
|
|
$listStudentAnswerInfo['words'][$i],
|
|
$feedbackType,
|
|
$resultsDisabled,
|
|
$showTotalScoreAndUserChoices
|
|
);
|
|
} else {
|
|
$listStudentAnswerInfo['student_answer'][$i] = self::getHtmlWrongAnswer(
|
|
$listStudentAnswerInfo['student_answer'][$i],
|
|
$listStudentAnswerInfo['words'][$i],
|
|
$feedbackType,
|
|
$resultsDisabled,
|
|
$showTotalScoreAndUserChoices
|
|
);
|
|
}
|
|
}
|
|
|
|
// rebuild the sentence with student answer inserted
|
|
for ($i = 0; $i < count($listStudentAnswerInfo['common_words']); $i++) {
|
|
$result .= isset($listStudentAnswerInfo['common_words'][$i]) ? $listStudentAnswerInfo['common_words'][$i] : '';
|
|
$result .= isset($listStudentAnswerInfo['student_answer'][$i]) ? $listStudentAnswerInfo['student_answer'][$i] : '';
|
|
}
|
|
|
|
// the last common word (should be </p>)
|
|
$result .= isset($listStudentAnswerInfo['common_words'][$i]) ? $listStudentAnswerInfo['common_words'][$i] : '';
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* return the HTML code of answer for correct and wrong answer
|
|
* @param string $answer
|
|
* @param string $correct
|
|
* @param string $right
|
|
* @param int $feedbackType
|
|
* @param bool $resultsDisabled
|
|
* @param bool $showTotalScoreAndUserChoices
|
|
* @return string
|
|
*/
|
|
public static function getHtmlAnswer(
|
|
$answer,
|
|
$correct,
|
|
$right,
|
|
$feedbackType,
|
|
$resultsDisabled = false,
|
|
$showTotalScoreAndUserChoices = false
|
|
) {
|
|
$hideExpectedAnswer = false;
|
|
if ($feedbackType == 0 && ($resultsDisabled == RESULT_DISABLE_SHOW_SCORE_ONLY)) {
|
|
$hideExpectedAnswer = true;
|
|
}
|
|
|
|
if ($resultsDisabled == RESULT_DISABLE_SHOW_SCORE_ATTEMPT_SHOW_ANSWERS_LAST_ATTEMPT) {
|
|
if ($showTotalScoreAndUserChoices) {
|
|
$hideExpectedAnswer = false;
|
|
} else {
|
|
$hideExpectedAnswer = true;
|
|
}
|
|
}
|
|
|
|
$style = "color: green";
|
|
if (!$right) {
|
|
$style = "color: red; text-decoration: line-through;";
|
|
}
|
|
$type = self::getFillTheBlankAnswerType($correct);
|
|
switch ($type) {
|
|
case self::FILL_THE_BLANK_MENU:
|
|
$correctAnswerHtml = '';
|
|
$listPossibleAnswers = self::getFillTheBlankMenuAnswers($correct, false);
|
|
$correctAnswerHtml .= "<span style='color: green'>".$listPossibleAnswers[0]."</span>";
|
|
$correctAnswerHtml .= " <span style='font-weight:normal'>(";
|
|
for ($i = 1; $i < count($listPossibleAnswers); $i++) {
|
|
$correctAnswerHtml .= $listPossibleAnswers[$i];
|
|
if ($i != count($listPossibleAnswers) - 1) {
|
|
$correctAnswerHtml .= " | ";
|
|
}
|
|
}
|
|
$correctAnswerHtml .= ")</span>";
|
|
break;
|
|
case self::FILL_THE_BLANK_SEVERAL_ANSWER:
|
|
$listCorrects = explode("||", $correct);
|
|
$firstCorrect = $correct;
|
|
if (count($listCorrects) > 0) {
|
|
$firstCorrect = $listCorrects[0];
|
|
}
|
|
$correctAnswerHtml = "<span style='color: green'>".$firstCorrect."</span>";
|
|
break;
|
|
case self::FILL_THE_BLANK_STANDARD:
|
|
default:
|
|
$correctAnswerHtml = "<span style='color: green'>".$correct."</span>";
|
|
}
|
|
|
|
if ($hideExpectedAnswer) {
|
|
$correctAnswerHtml = "<span title='".get_lang("ExerciseWithFeedbackWithoutCorrectionComment")."'> - </span>";
|
|
}
|
|
|
|
$result = "<span style='border:1px solid black; border-radius:5px; padding:2px; font-weight:bold;'>";
|
|
$result .= "<span style='$style'>".$answer."</span>";
|
|
$result .= " <span style='font-size:120%;'>/</span> ";
|
|
$result .= $correctAnswerHtml;
|
|
$result .= "</span>";
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* return HTML code for correct answer
|
|
* @param string $answer
|
|
* @param string $correct
|
|
* @param string $feedbackType
|
|
* @param bool $resultsDisabled
|
|
* @param bool $showTotalScoreAndUserChoices
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function getHtmlRightAnswer(
|
|
$answer,
|
|
$correct,
|
|
$feedbackType,
|
|
$resultsDisabled = false,
|
|
$showTotalScoreAndUserChoices = false
|
|
) {
|
|
return self::getHtmlAnswer(
|
|
$answer,
|
|
$correct,
|
|
true,
|
|
$feedbackType,
|
|
$resultsDisabled,
|
|
$showTotalScoreAndUserChoices
|
|
);
|
|
}
|
|
|
|
/**
|
|
* return HTML code for wrong answer
|
|
* @param string $answer
|
|
* @param string $correct
|
|
* @param string $feedbackType
|
|
* @param bool $resultsDisabled
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function getHtmlWrongAnswer(
|
|
$answer,
|
|
$correct,
|
|
$feedbackType,
|
|
$resultsDisabled = false,
|
|
$showTotalScoreAndUserChoices = false
|
|
) {
|
|
return self::getHtmlAnswer(
|
|
$answer,
|
|
$correct,
|
|
false,
|
|
$feedbackType,
|
|
$resultsDisabled,
|
|
$showTotalScoreAndUserChoices
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Check if a answer is correct by its text
|
|
* @param string $answerText
|
|
* @return bool
|
|
*/
|
|
public static function isCorrect($answerText)
|
|
{
|
|
$answerInfo = self::getAnswerInfo($answerText, true);
|
|
$correctAnswerList = $answerInfo['words'];
|
|
$studentAnswer = $answerInfo['student_answer'];
|
|
$isCorrect = true;
|
|
|
|
foreach ($correctAnswerList as $i => $correctAnswer) {
|
|
$value = self::isStudentAnswerGood($studentAnswer[$i], $correctAnswer);
|
|
$isCorrect = $isCorrect && $value;
|
|
}
|
|
|
|
return $isCorrect;
|
|
}
|
|
|
|
/**
|
|
* Clear the answer entered by student
|
|
* @param string $answer
|
|
* @return string
|
|
*/
|
|
public static function clearStudentAnswer($answer)
|
|
{
|
|
$answer = htmlentities(api_utf8_encode($answer), ENT_QUOTES);
|
|
$answer = str_replace(''', ''', $answer); // fix apostrophe
|
|
$answer = api_preg_replace('/\s\s+/', ' ', $answer); // replace excess white spaces
|
|
$answer = strtr($answer, array_flip(get_html_translation_table(HTML_ENTITIES, ENT_QUOTES)));
|
|
|
|
return trim($answer);
|
|
}
|
|
}
|
|
|