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<?php
// Setting for the re-evaluation phase..
$second_phase = 0;
session_start();
include 'credential.php';
if(!isset($_SESSION['encrpy']) || !isset($_SESSION['user']) || $_SESSION['encrpy'] != md5($_SESSION['user']."unbreakabelcipehre")) {
// user is not logged in, do something like redirect to login.php
header("Location: logon.php");
die();
}
if($_SESSION['access'] != 1) {
// another example...
// user is logged in but not a manager, let's stop him
die("Access Denied");
}
?>
<?php
function mean($array){
if(count($array) == 0){
return 0;
}
return array_sum($array)/count($array);
}
// Function to calculate square of value - mean
function sd_square($x, $mean) { return pow($x - $mean,2); }
// Function to calculate standard deviation (uses sd_square)
function sd($array) {
// square root of sum of squares devided by N-1
if(count($array) <= 1){
return 0;
}
return sqrt(array_sum(array_map("sd_square", $array, array_fill(0,count($array), (array_sum($array) / count($array)) ) ) ) / (count($array)-1) );
}
?>
<?php
$ta = $_SESSION['user'];
$ta = explode(',', $ta);
parse_str($ta[0]);
// start : for each questions
// search in correction_ta with each ta_id and ques_id for stud_id
// get 'n' marks with peer_id (stud_id) and ques_id
// compute and classify it
$main_array = array();
$con = @mysqli_connect($host, $user, $pass, $db);
if (@mysqli_connect_errno()){
echo "<script> alert('Server is Offline. Please try again later.'); window.location.href = 'logon.php';</script>";
die();
}
//$uid = '*';
$query = "Select q_id from question";
$result = @mysqli_query($con, $query);
$count = 0;
while($row = mysqli_fetch_array($result, MYSQLI_ASSOC)){
$quest_id = $row['q_id'];
$query = "Select stud_id, ta_id from correction_ta where ta_id = '$uid' and question_id = $quest_id";
if($uid == 'rkala')
$query = "Select stud_id, ta_id from correction_ta where question_id = $quest_id";
$result_2 = @mysqli_query($con, $query) or die(mysqli_error());
while($row_2 = mysqli_fetch_array($result_2, MYSQLI_ASSOC)){
$stud_id = $row_2['stud_id'];
$taa_id = $row_2['ta_id'];
$array_marks = array();
$query = "Select marks from allocation where peer_id = '$stud_id' and question_id = $quest_id and blur is not null and blur <> 1";
$result_3 = @mysqli_query($con, $query) or die(mysqli_error());
while($row_3 = mysqli_fetch_array($result_3, MYSQLI_ASSOC)){
$marks = $row_3['marks'];
array_push($array_marks, $marks);
}
$query = "Select marks from correction_ta where ta_id = '$uid' and stud_id = '$stud_id' and question_id = $quest_id";
if($uid == 'rkala')
$query = "Select marks from correction_ta where stud_id = '$stud_id' and question_id = $quest_id";
$result_3 = @mysqli_query($con, $query) or die(mysqli_error());
$ta_mark = 0;
while($row_3 = mysqli_fetch_array($result_3)){
$ta_mark = $row_3['marks'];
}
/**************/
// get self evaluated score
$self_marks = 0;
$self_marking = -1;
$query = "select self_marks from evaluation_purpose_table where ques_id = $quest_id and stud_id = '$stud_id'";
$result_3 = @mysqli_query($con, $query) or die(mysqli_error());
while($row_3 = mysqli_fetch_array($result_3, MYSQLI_ASSOC)){
$self_marks = $row_3['self_marks'];
$self_marking = $row_3['self_marks'];
}
if($self_marking == -1){
array_push($array_marks, $ta_mark);
}else{
array_push($array_marks, $self_marks);
}
// find threshold
$threshold = 0;
$query = "select threshold from question where q_id = $quest_id";
$result_3 = @mysqli_query($con, $query) or die(mysqli_error());
while($row_3 = mysqli_fetch_array($result_3, MYSQLI_ASSOC)){
$threshold = $row_3['threshold'];
}
// sort the array
sort($array_marks);
// find median and get min and max value using thres // find number of evaluation lying inside ranges
$weight = 0;
$median = 0;
$arrlength = count($array_marks);
if ($arrlength%2 == 0){
$median = ($array_marks[$arrlength/2] + $array_marks[($arrlength/2) - 1])/2.0;
}else{
$median = $array_marks[($arrlength/2)];
}
for($x = 0; $x < $arrlength; $x++) {
$weight += 1;
if (($array_marks[$x] > ($median+$threshold)) && ($array_marks[$x] < ($median-$threshold))){
$weight += 0;
}
}
$display = 1;
//echo $stud_id . "<br>" . $ta_mark. "<br>" . $median . "<br>" . $threshold. "<br>" . $quest_id . "<br><br>";
if (($ta_mark >= ($median-$threshold)) && ($ta_mark <= ($median+$threshold))){
$display = 0;
}
/**************/
// Weighted factor for generating error
//$factor = 0.25*sd($array_marks) + 0.75*abs(mean($array_marks) - $ta_mark);
$factor = $weight;
if($second_phase == 1){
if($display == 1){
$temp_array = array($factor, $quest_id, $stud_id, $taa_id, $self_marking);
array_push($main_array, $temp_array);
}
}else{
if($uid == 'rkala' or $display == 1){
$temp_array = array($factor, $quest_id, $stud_id, $taa_id, $self_marking);
array_push($main_array, $temp_array);
}
}
/*
// Weighted factor for generating error
$factor = 0.25*sd($array_marks) + 0.75*abs(mean($array_marks) - $ta_mark);
$temp_array = array($factor, $quest_id, $stud_id, $taa_id);
array_push($main_array, $temp_array);
*/
}
}
mysqli_free_result($result);
mysqli_close($con);
foreach ($main_array as $key => $row) {
// replace 0 with the field's index/key
$dates[$key] = $row[0];
}
if(count($main_array) > 0){
array_multisort($dates, SORT_DESC, $main_array);
}
// To visualize the sorting action
/*
for ($row = 0; $row < count($main_array); $row++) {
echo "<p><b>Row number $row</b></p>";
echo "<ul>";
for ($col = 0; $col < count($main_array[0]); $col++) {
echo "<li>".$main_array[$row][$col]."</li>";
}
echo "</ul>";
}
*/
?>
<html>
<script src="js/jquery-2.1.3.js"></script>
<script src="js/bootstrap.min.js"></script>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="css/bootstrap.min.css">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<script>
function w3_open() {
document.getElementById("mySidebar").style.display = "block";
}
function w3_close() {
document.getElementById("mySidebar").style.display = "none";
}
</script>
<style>
h4{
background-color: #fff;
color:white !important;
text-align: right;
padding-right : 50px;
font-size: 20px;
}
h2{
background-color: #eee;
color:white !important;
text-align: right;
padding-right : 50px;
font-size: 20px;
}
table, th, td {
border: 2px solid black;
border-collapse: collapse;
-moz-border-radius: 4px;
-webkit-border-radius: 4px;
border-collapse:separate;
border-radius: 4px;
}
th, td {
padding: 5px;
text-align: center;
}
table#t01 tr:nth-child(even) {
background-color: #ded;
}
table#t01 tr:nth-child(odd) {
background-color:#fff;
}
table#t01 th {
background-color: black;
text-align: center;
color: white;
}
</style>
<title>Report</title>
<body>
<!-- Sidebar -->
<div class="w3-sidebar w3-large w3-bar-block w3-border-right w3-animate-left" style="display:none" id="mySidebar">
<button onclick="w3_close()" class="w3-bar-item w3-large">Close ×</button>
<a href="ta.php" class="w3-bar-item w3-button">User</a>
<a href="student_insert.php" class="w3-bar-item w3-button">Scanning</a>
<a href="#" target="_blank" class="w3-bar-item w3-button">Re-Evaluation</a>
<a href="logon.php?out" class="w3-bar-item w3-button">Logout</a>
</div>
<div class="w3-teal">
<button class="w3-button w3-teal w3-xlarge" onclick="w3_open()">☰</button>
<h1 align="center">
Students
</h1>
</div>
<h3>
<table align="center" id="t01" style="width:50%">
<tr> <th>Roll</th><th>TA</th> <th>Question</th><th>Evaluation_count</th><th>Self-marks</th></tr>
<?php
$i = 0;
while($i < count($main_array)){ //Creates a loop to loop through results
//echo $i. " : " . $row[0];
echo "<tr> <td><a onclick=\"window.open('re_eval.php?roll=".$main_array[$i][2]."&quest=".$main_array[$i][1]."', 'newwindow', 'width=500, height=550'); return false;\" href = '#'>". $main_array[$i][2]. "</a></td><td>" . $main_array[$i][3] . "</td><td>" . $main_array[$i][1] . "</td><td>" . $main_array[$i][0] . "</td><td>" . $main_array[$i][4] . "</td></tr>";
$i += 1;
?>
<?php
}
?>
</table>
</h3>
</body>
</html>