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// Last Modified: 2009-10-31 // // Only the purchaser may use and modify this script. // The author will customize this script for $25/hour with // a $10 minimum. // //////////////////////////////////////////////////////////// // // SET VARIABLES // // name of XML file which contains your quiz data $xml_file = "quiz.xml"; // QUESTION ORDER: // "file" for order of questions as they appear in "xml_file" above // "random" for random order of questions $question_order = "file"; // CHECK ANSWERS AFTER EACH QUESTION: // 0 for "no"; 1 for "yes" $check_answers_immediately = 1; // CASE-SENSITIVE ANSWERS: // 0 for "no"; 1 for "yes" $case_sensitive = 0; // PRINT EXPLANATIONS AFTER EACH QUESTION // "0" for no explanations // "1" for explanations only with incorrect answers // "2" for explanations with correct and incorrect answers $explanations = 2; // AUTOMATICALLY GENERATE MULTIPLE CHOICES FOR QUESTIONS: // 0 for "no"; 1 for "yes" $multiple_choice = 0; // number of choices to be generated (not including correct answer) $no_multiple_choices = 3; // USER REPORT: // "score_only" for score only // "corrected_quiz" for questions, multiple-choice answers, user's answer, correct answer, and explanation // "user_statistics" for user's answer, correct answer, and percentage of users who answered correctly $report_type = "corrected_quiz"; // PRINT IMAGES IN REPORT: // 0 for "no"; 1 for "yes" $show_images = 0; // PRINT LINKS TO URLS, AUDIO, AND VIDEO IN REPORT: // 0 for "no"; 1 for "yes" $media_links = 1; // // GET QUIZ DATA FROM XML FILE // // create new SimpleXML object from XML file $quiz = simplexml_load_file($xml_file); // // IMPORT POST VARIABLES // import_request_variables("p", "post_"); // // ERROR-CHECKING // // check "multiple_choice" setting for error if ($multiple_choice) { // get number of questions in quiz $no_questions_in_quiz = count($quiz); // "multiple_choice" setting will not work if there are not enough questions in the quiz if ($no_questions_in_quiz < $no_multiple_choices) { echo "Error: You have configured xmlQuiz to generate $no_multiple_choices choices per question, but there are only $no_questions_in_quiz questions in the $xml_file. Lower the number of choices per question or increase the number of questions.
"; } } // // FUNCTIONS // // get number for random answer function get_random_answer($multiple_choices, $question_no_in_file) { global $quiz; // get a random number corresponding to "quiz" object $random_no = rand(0, count($quiz) - 1); // try again if this random number is repetitive or matches the correct answer if (in_array($quiz->question[$random_no]->answer, $multiple_choices) || $random_no == $question_no_in_file) { return get_random_answer($multiple_choices, $question_no_in_file); } // return random number else { return $random_no; } } // print question function print_question($question_no_in_quiz, $question_no_in_file) { global $quiz, $question_order, $post_answers, $multiple_choice, $no_multiple_choices; // print question number echo "Question #$question_no_in_quiz of " . count($quiz) . "
\n"; // print hyperlink if ($quiz->question[$question_no_in_file]->url) { echo "URL: question[$question_no_in_file]->url . "\">" . $quiz->question[$question_no_in_file]->url . "
\n"; } // print question image if ($quiz->question[$question_no_in_file]->image) { echo "question[$question_no_in_file]->image . "\" />
" . $quiz->question[$question_no_in_file]->text . "
\n"; // print answering form echo "\n"; } // check answer and print message function check_answer($answers, $question_no_in_file) { global $quiz, $explanations; // print message for correct answer if (($case_sensitive && ($answers[$question_no_in_file] == $quiz->question[$question_no_in_file]->answer)) || (!$case_sensitive && (strtolower($answers[$question_no_in_file]) == strtolower($quiz->question[$question_no_in_file]->answer)))) { echo "Correct!"; // print explanation of correct answer if ($explanations == 2 && $quiz->question[$question_no_in_file]->explanation) { echo "
\n"; if ($quiz->question[$question_no_in_file]->answerimage) { echo "question[$question_no_in_file]->answerimage . "\" />
" . $quiz->question[$question_no_in_file]->explanation; } echo "
\n"; } // print message for incorrect answer else { echo "Sorry, the correct answer is " . $quiz->question[$question_no_in_file]->answer . "."; // print explanation of correct answer if ($explanations >= 1 && $quiz->question[$question_no_in_file]->explanation) { echo "
\n"; if ($quiz->question[$question_no_in_file]->answerimage) { echo "question[$question_no_in_file]->answerimage . "\" />
" . $quiz->question[$question_no_in_file]->explanation; } echo "
\n"; } } if (!isset($post_next_question) && !isset($post_calculate_score)) { // print first question in file if ($question_order == "file") { print_question(1, 0); } // print random question if ($question_order == "random") { // create "questions" array for ($i = 0; $i < count($quiz); $i++) { $questions[$i + 1] = $i; } // get random question number $question_no = array_rand($questions); print_question(1, $questions[$question_no]); } } // // PRINT NEXT QUESTION // if (isset($post_next_question)) { // make "post_question_no_in_file" an integer settype($post_question_no_in_file, "integer"); // set answer of unanswered question to "Unanswered" if ($post_answers[$post_question_no_in_file] == "") { $post_answers[$post_question_no_in_file] = "Unanswered"; } // check previous question now if ($check_answers_immediately) { check_answer($post_answers, $post_question_no_in_file); } // increment "post_question_no_in_quiz" $post_question_no_in_quiz++; // print next question in file if ($question_order == "file") { print_question($post_question_no_in_quiz, $post_question_no_in_quiz - 1); } // print another random question if ($question_order == "random") { // create "questions" array from which a random question will be selected for ($i = 0; $i < count($quiz); $i++) { $questions[$i + 1] = $i; } // get keys from "post_answers" array $answered_questions = array_keys($post_answers); // remove answered questions from "questions" array for ($i = 0; $i < count($answered_questions); $i++) { // look for an element containing this question in "questions" array $key = array_search($answered_questions[$i], $questions); // remove this element from "questions" array if ($key != null) { unset($questions[$key]); } } // get random question number $question_no = array_rand($questions); print_question($post_question_no_in_quiz, $questions[$question_no]); } } // // CALCULATE AND PRINT SCORE // if (isset($post_calculate_score)) { // make "post_question_no_in_file" an integer settype($post_question_no_in_file, "integer"); // set answer of unanswered questions to "Unanswered" if ($post_answers[$post_question_no_in_file] == "") { $post_answers[$post_question_no_in_file] = "Unanswered"; } // check last question now if ($check_answers_immediately) { check_answer($post_answers, $post_question_no_in_file); } // get number of questions in quiz $no_questions = count($quiz); // get number of correct answers and adjust tally in "xml_file" for ($i = 0; $i < $no_questions; $i++) { // increment "no_correct_answers" variable if user has correct answer if (($case_sensitive && ($post_answers[$i] == $quiz->question[$i]->answer)) || (!$case_sensitive && (strtolower($post_answers[$i]) == strtolower($quiz->question[$i]->answer)))) { $no_correct_answers++; // increment correct tally $quiz->question[$i]->tally->correct = $quiz->question[$i]->tally->correct + 1; } // increment incorrect tally else { $quiz->question[$i]->tally->incorrect = $quiz->question[$i]->tally->incorrect + 1; } } // update XML file with new tallies $fp_xml_file = fopen($xml_file, "w"); fwrite($fp_xml_file, $quiz->asXML()); fclose($fp_xml_file); // calculate score $score = ($no_correct_answers / $no_questions) * 100; // round score to nearest whole precentage point $score = round($score); // print score echo "Score: $score%
\n"; // print appropriate comment if ($no_correct_answers == 0) { echo "You answered no questions correctly. Try again.
\n"; } if ($no_correct_answers == 1) { echo "You answered 1 out of $no_questions questions correctly. Try again.
\n"; } if ($no_correct_answers > 1 && $no_correct_answers < $no_questions) { echo "You answered $no_correct_answers out of $no_questions questions correctly. Try again.
\n"; } if ($no_correct_answers == $no_questions) { echo "You answered all questions correctly!
\n"; } // // PRINT CORRECTED QUIZ // if ($report_type == "corrected_quiz") { echo "Corrected Quiz
\n"; echo "- \n";
// print each question with multiple-choice answers
for ($n = 0; $n < count($post_answers); $n++) {
echo "
- \n";
echo "
" . $quiz->question[$n]->text . "
\n"; // print correct answer with image if ($show_images && $quiz->question[$n]->image) { echo "
\n"; } // print question with media links elseif ($media_links) { if ($quiz->question[$n]->url) { echo "question[$n]->image . "\" />
URL: question[$n]->url) . "\">" . htmlspecialchars($quiz->question[$n]->url) . "
\n"; } if ($quiz->question[$n]->audio) { echo "Audio: question[$n]->audio) . "\">" . htmlspecialchars($quiz->question[$n]->audio) . "
\n"; } if ($quiz->question[$n]->video) { echo "Video: question[$n]->video) . "\">" . htmlspecialchars($quiz->question[$n]->video) . "
\n"; } } // print multiple-choice question if ($quiz->question[$n]->choices) { echo "- \n";
// evaluate each multiple-choice answer
foreach ($quiz->question[$n]->choices->choice as $choice) {
// highlight correct answer
if ($choice == (string)$quiz->question[$n]->answer) {
echo "
- " . $choice . " \n"; } // highlight user's answer elseif ($choice == $post_answers[$n]) { echo "
- " . $choice . " \n"; } else { echo "
- " . $choice . " \n"; } } echo "
Correct!
\n"; } // mark question as unanswered elseif ($post_answers[$n] == "Unanswered") { echo "Unanswered.
\n"; } // mark answer as incorrect else { echo "Incorrect!"; // print explanation if ($quiz->question[$n]->explanation) { echo "
" . $quiz->question[$n]->explanation; } echo "
\n"; } } // print short-answer question else { // mark question as correct if ($post_answers[$n] == $quiz->question[$n]->answer) { echo "" . $post_answers[$n] . "
\n"; echo "Correct!
\n"; } // mark question as unanswered elseif ($post_answers[$n] == "Unanswered") { echo "Unanswered. The correct answer is " . $quiz->question[$n]->answer . "."; // print explanation if ($quiz->question[$n]->explanation) { echo "
" . $quiz->question[$n]->explanation; } echo "
\n"; } // mark question as incorrect else { echo "" . $post_answers[$n] . "
\n"; echo "Incorrect! The correct answer is " . $quiz->question[$n]->answer . "."; // print explanation if ($quiz->question[$n]->explanation) { echo "
" . $quiz->question[$n]->explanation; } echo "
\n"; } } echo " \n";
}
echo "
| Question | \n"; echo "\tYour Answer | \n"; echo "\tCorrect Answer | \n"; echo "\t% who Answered this Question Correctly | \n"; echo "|||
|---|---|---|---|---|---|---|
| \n";
echo " " . $quiz->question[$n]->text . " \n"; echo "
| \n";
}
// print question with media links
elseif ($media_links) {
echo "\t\n";
echo " " . $quiz->question[$n]->text . " \n"; if ($quiz->question[$n]->url) { echo "URL: question[$n]->url) . "\">" . htmlspecialchars($quiz->question[$n]->url) . " \n"; } if ($quiz->question[$n]->audio) { echo "Audio: question[$n]->audio) . "\">" . htmlspecialchars($quiz->question[$n]->audio) . " \n"; } if ($quiz->question[$n]->video) { echo "Video: question[$n]->video) . "\">" . htmlspecialchars($quiz->question[$n]->video) . " \n"; } echo " | \n";
}
// print question without image
else {
echo "\t" . $quiz->question[$n]->text . " | \n"; } // print user's answer if (($case_sensitive && ($post_answers[$n] == $quiz->question[$n]->answer)) || (!$case_sensitive && (strtolower($post_answers[$n]) == strtolower($quiz->question[$n]->answer)))) { echo "\t" . $post_answers[$n] . " | \n"; } else { echo "\t" . $post_answers[$n] . " | \n"; } // print correct answer echo "\t" . $quiz->question[$n]->answer . " | \n"; // get percent correct if ($quiz->question[$n]->tally->correct > 0) { $percent_correct = ($quiz->question[$n]->tally->correct / $total_answers) * 100; // round percent correct to nearest whole precentage point $percent_correct = round($percent_correct); } else { $percent_correct = 0; } // print percent correct echo "\t" . $percent_correct . "% | \n"; echo "