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Proquiz.class.php
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Proquiz.class.php
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<?php
/*!
* **************************************************************
**************** ProQuiz V2 ******************************
***************************************************************/
/* documentation at: http://proquiz.softon.org/documentation/
/* Designed & Maintained by
/* - Softon Technologies
/* Developer
/* - Manzovi
/* For Support Contact @
/* - proquiz@softon.org
/* Release Date : 02 Feb 2011
/* Licensed under GPL license:
/* http://www.gnu.org/licenses/gpl.html
*/
?><?php
class Proquiz {
var $modules;
var $instid;
var $qstn_str = "|";
var $qstn_type_str = "|";
var $total_time = 0;
var $total_qstn = 0;
static $total_cont = 0;
var $category = "|";
function __construct(){
global $modules;
$this->modules = $modules;
if(!isset($_SESSION)){
session_start();
}
$_SESSION['SCRIPTQUIZ']['modules']['path'] = './modules/';
$_SESSION['SCRIPTQUIZ']['modules'] = $modules;
}
// Get total questions in selected categorys and subs
function getTotalQstn($db,$cat){
$query = "SELECT count(*) as `num` FROM `".QUIZTABLE."`";
if(!empty($cat) && $cat[0]!='All'){
$query .= " WHERE ";
foreach($cat as $key=>$cat_arr){
$cat_val = explode("_",$cat_arr);
$query_arr[$key] = " (`category` = '".$db->escape($cat_val[0])."'";
if($cat_val[1]!= 'All'){
$query_arr[$key] .= "AND `sub_cat` = '".$db->escape($cat_val[1])."') ";
}else{
$query_arr[$key] .= ")";
}
}
$query .= implode(" OR ",$query_arr);
}
$rec_count = $db->fetch_all_array($query);
return $rec_count[0]['num'];
}
// Get Questions for Quiz
function getQuestion($db,$cat,$qstn,$qtime){
$query = "SELECT * FROM `".QUIZTABLE."`";
if(!empty($cat) && $cat[0]!='All'){
$query .= " WHERE ";
foreach($cat as $key=>$cat_arr){
$cat_val = explode("_",$cat_arr);
$query_arr[$key] = " (`category` = '".$db->escape($cat_val[0])."'";
if($cat_val[1]!= 'All'){
$query_arr[$key] .= "AND `sub_cat` = '".$db->escape($cat_val[1])."') ";
}else{
$query_arr[$key] .= ")";
}
}
$query .= implode(" OR ",$query_arr);
}
$query .= " ORDER BY `count`";
$rec_arr = $db->fetch_all_array($query);
$sub_arr = array();
$quiz_qstn = array();
for($i=0;$i<$qstn;$i++){
while(1){
$rid = rand(0,count($rec_arr)-1);
if(!in_array($rid,$sub_arr)){
$sub_arr[$i] = $rid;
$quiz_qstn[$i]['qid'] = $rec_arr[$i]['qid'];
$quiz_qstn[$i]['category'] = $rec_arr[$i]['category'];
$quiz_qstn[$i]['questions'] = $rec_arr[$i]['question'];
$quiz_qstn[$i]['answers'] = $rec_arr[$i]['answer'];
$quiz_qstn[$i]['types'] = $rec_arr[$i]['type'];
$quiz_qstn[$i]['options'] = $rec_arr[$i]['options'];
$this->qstn_str .= $rec_arr[$i]['qid']."|";
$this->qstn_type_str .= $rec_arr[$i]['type']."|";
$this->category .= $rec_arr[$i]['category']."|";
$this->incrQIDcount($db,$rec_arr[$i]['qid']);
break;
}
}
}
$this->qstn_str = trim($this->qstn_str,"|");
$this->qstn_type_str = trim($this->qstn_type_str,"|");
$this->category = trim($this->category,"|");
$this->total_time = $qtime;
$this->total_qstn = $qstn;
return $quiz_qstn;
}
// Function for new Quiz Instance
function newInstance($db,$ua_details){
$data['instid'] =$this->instid;
$data['user'] = $ua_details['randid'];
$data['quiz_inst_ts'] = time();
$data['questions_arr'] = $this->qstn_str;
$data['type_arr'] = $this->qstn_type_str;
$data['cat_arr'] = $this->category;
$data['total_qstn'] = $this->total_qstn;
$data['total_time'] = $this->total_time;
$data['created_by'] = "system";
$id = $db->query_insert(QUIZDB,$data);
if(!empty($id)){
return $data;
}else{
return false;
}
}
// Function for generating Unique ID
function getUniqueID($db){
while(1){
$nob = rand(1000000000,9999999999);
$sql = "SELECT * FROM `".QUIZDB."` WHERE `instid` = '".$nob."'";
$record = $db->query_first($sql);
if(empty($record)){
break;
}
}
$this->instid = $nob;
return $nob;
}
// Function to increment the question usage counter
function incrQIDcount($db,$qid){
$data['count'] = "INCREMENT(1)";
$db->query_update(QUIZTABLE,$data,"`qid`=$qid");
}
/// Quiz Started TS
function start_quiz_ts($db,$id){
$data['quiz_start_ts'] = time();
$db->query_update(QUIZDB,$data,"instid='".$id."'");
return $data['quiz_start_ts'];
}
// Process Quiz Results
function processQuiz($db,$quiz,$post){
// Anti Hack
if(getSettings($db,'enblathack')){
if(!$this->antiHack($db,$quiz)){
$_SESSION['hackattempt'] = "yes";
header("Location:hackattempt.php");
}
}
$total_correct = 0;
$total_wrong = 0;
$total_blank = 0;
$pq_arr['quiz_end_ts'] = $quiz['PARAMS']['quiz_end_ts'];
foreach($quiz['DATA'] as $data){
if(empty($post[$data['qid']])){
$pq_arr['answers_arr'] .= "0|";
}else{
$pq_arr['answers_arr'] .= $post[$data['qid']]."|";
}
$pq_arr['canswers_arr'] .= $data['answers']."|";
if(empty($quiz['ANSWERS'][$data['qid']]['ts'])){
$pq_arr['timing_arr'] .= "0|";
}else{
$pq_arr['timing_arr'] .= $quiz['ANSWERS'][$data['qid']]['ts']."|";
}
if($data['answers'] == $post[$data['qid']]){
$total_correct++;
}else{
if(empty($post[$data['qid']])){
$total_blank++;
}else{
$total_wrong++;
}
}
}
$diff = $quiz['PARAMS']['quiz_end_ts'] - $quiz['PARAMS']['quiz_start_ts'];
if($diff > $quiz['PARAMS']['total_time']*60){
$pq_arr['time_used'] = $quiz['PARAMS']['total_time']*60;
}else{
$pq_arr['time_used'] = $diff;
}
$pq_arr['total_correct'] = $total_correct;
$pq_arr['total_wrong'] = $total_wrong;
$pq_arr['answers_arr'] = trim($pq_arr['answers_arr'],"|");
$pq_arr['canswers_arr'] = trim ($pq_arr['canswers_arr'],"|");
$pq_arr['timing_arr'] = trim($pq_arr['timing_arr'],"|");
$pq_arr['percentage'] = round(($total_correct/$quiz['PARAMS']['total_qstn'])*100,2);
$db->query_update(QUIZDB,$pq_arr,"instid='".$quiz['INSTID']."'");
$pq_arr['rank'] = $this->getRank($db,$pq_arr['percentage'],$pq_arr['time_used']/$quiz['PARAMS']['total_qstn']);
$pq_arr['percentile'] = $this->getPercentile($pq_arr['rank']);
$pq_arr['total_blank'] = $total_blank;
$pq_arr['total_time'] = $quiz['PARAMS']['total_time'];
$pq_arr['time_unused'] = $quiz['PARAMS']['total_time']*60 - $pq_arr['time_used'];
$pq_arr['total_question'] = $quiz['PARAMS']['total_qstn'];
$pq_arr['instid'] = $quiz['PARAMS']['instid'];
return $pq_arr;
}
// Detect Hack
function antiHack($db,$quiz){
$threshold = getSettings($db,'ahthold');
$detT = ($quiz['PARAMS']['total_time']*60 + $threshold) - ($quiz['PARAMS']['quiz_end_ts'] - $quiz['PARAMS']['quiz_start_ts']);
if($detT < 0){
// Delete Record
if(getSettings($db,'delrecord')){
$this->delRecord($db,$quiz['PARAMS']['instid']);
}
// Deactivate User
if(getSettings($db,'deactuser') && ($_SESSION['UA_DETAILS']['level']!='admin')){
$this->deactUser($db,$quiz['PARAMS']['user']);
}
return false;
}else{
return true;
}
}
// Delete Quiz Record
function delRecord($db,$instid){
$sql = "DELETE FROM ".QUIZDB." WHERE `instid` = '".$instid."'";
if($db->query($sql)){
return true;
}else{
return false;
}
}
// Deactivate User
function deactUser($db,$randid){
$sql = "UPDATE ".UA_TABLE." SET `active` = (`active`+1)%2 WHERE `randid` = '".$randid."'";
$db->query($sql);
}
// get rank
function getRank($db,$p,$avg_time){ //(database,persentage,average time / question)
$sql = "SELECT `percentage` FROM ".QUIZDB." WHERE `created_by` = 'system' ORDER BY `percentage` DESC";
$per = $db->query($sql);
$rank = 0;
$offset = 0;
Proquiz::$total_cont = mysql_num_rows($per);
while($per_s = $db->fetch_array($per)){
if($p == $per_s['percentage']){
$offset = Proquiz::getRankOffset($db,$p,$avg_time);
break;
}
$rank++;
}
return $rank+$offset+1;
}
// get Rank Offset
function getRankOffset($db,$p,$avg_time){
$offset = 0;
$sql = "SELECT * FROM ".QUIZDB." WHERE `created_by` = 'system' AND `percentage` = '".$p."'";
$p_arr = $db->fetch_all_array($sql);
foreach($p_arr as $elements){
if($avg_time > ($elements['time_used']/$elements['total_qstn'])){
$offset++;
}
}
return $offset;
}
// get percentile
function getPercentile($rank){
$percentile = ((Proquiz::$total_cont - $rank)/Proquiz::$total_cont)*100;
return round($percentile,2);
}
// Get Summary
function getSummary($db,$qid){
$sql = "SELECT * FROM ".QUIZDB." WHERE `instid` = '".$qid."' ";
return $db->query_first($sql);
}
/// Add Question Function
function pqAddQuestion($db,$post_vars,$ua_details,$type){
$j = (int)$post_vars['opt_count'];
$data['qid'] = $this->getQID($db);
$data['question'] = $post_vars['pq_qstn'];
for($i=1;$i<=$j;$i++){
$data['options'] .= $this->checkSpceChar($post_vars['option_'.$i])."|";
}
$data['options'] = trim($data['options'],"|");
$data['answer'] = $this->checkSpceChar($post_vars['option_'.$post_vars['opt_ans']]);
$data['type'] = $type;
$data['category'] = $post_vars['quiz_category'];
$data['sub_cat'] = $post_vars['quiz_sub_category'];
$data['added_by'] = $ua_details['randid'];
$data['open_quiz'] = $post_vars['open_quiz'];
$data['count'] = 0;
if($ua_details['level']=='admin'){
$data['active'] = 1;
}else{
$data['active'] = 0;
}
if($db->query_insert(QUIZTABLE,$data)){
return true;
}else{
return false;
}
}
/// Add Question Function
function pqEditQuestion($db,$post_vars,$ua_details,$type,$qid){
$j = (int)$post_vars['opt_count'];
$data['question'] = html_entity_decode($post_vars['pq_qstn']);
for($i=1;$i<=$j;$i++){
$data['options'] .= html_entity_decode($this->checkSpceChar($post_vars['option_'.$i]))."|";
}
$data['options'] = trim($data['options'],"|");
$data['answer'] = $this->checkSpceChar(html_entity_decode($post_vars['option_'.$post_vars['opt_ans']]));
$data['type'] = $type;
$data['category'] = $post_vars['quiz_category'];
$data['sub_cat'] = $post_vars['quiz_sub_category'];
$data['open_quiz'] = $post_vars['open_quiz'];
if($ua_details['level']=='admin'){
$data['active'] = 1;
}else{
$data['active'] = 0;
}
if($db->query_update(QUIZTABLE,$data," `qid` = '".$qid."' AND `added_by` = '".$ua_details['randid']."'")){
return true;
}else{
return false;
}
}
// Function for generating Unique Quiz ID
function getQID($db){
while(1){
$nob = rand(1000000000,9999999999);
$sql = "SELECT * FROM `".QUIZTABLE."` WHERE `qid` = '".$nob."'";
$record = $db->query_first($sql);
if(empty($record)){
break;
}
}
return $nob;
}
function checkSpceChar($var_data){
return str_replace("|","_",$var_data);
}
// Delete User Records
function delUserRecords($db,$randid){
$sql = "DELETE FROM ".QUIZDB." WHERE `user` = '".$randid."'";
if($db->query($sql)){
return true;
}else{
return false;
}
}
}
?>