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#this block is for the login session validation
# the other sql queries is for the rest of the php code, all these codes is on the frontend
session_start();
if (isset($_SESSION['sessionn']) && !empty($_SESSION['class'])) {
$class = $_SESSION['class'];
$sessionn = $_SESSION['sessionn'];
$term = $_SESSION['term'];
include 'db-conn.php';
$Tsql = "SELECT id FROM `terms` WHERE name = '$term'";
$Tquery = mysqli_query($conn, $Tsql);
$Tresult = mysqli_fetch_assoc($Tquery);
$Term = $Tresult["id"];
$Ssql = "SELECT id FROM `sessions` WHERE name = '$sessionn'";
$Squery = mysqli_query($conn, $Ssql);
$Sresult = mysqli_fetch_assoc($Squery);
$Sessionn = $Sresult["id"];
$Csql = "SELECT id FROM `classes` WHERE class = '$class'";
$Cquery = mysqli_query($conn, $Csql);
$Cresult = mysqli_fetch_assoc($Cquery);
$Class= $Cresult["id"];
// Query to get distinct subjects for the specified class
$subjects_query = "SELECT DISTINCT subjects.name AS subject_name
FROM students_subjects
INNER JOIN subjects ON students_subjects.subject_id = subjects.id
WHERE students_subjects.class = $Class AND students_subjects.term_id = $Term
AND students_subjects.session_id = $Sessionn";
$subjects_result = $conn->query($subjects_query);
// Query to get distinct subjects for the specified class
$subjects1_query = "SELECT DISTINCT subjects.name AS subjectt_name
FROM students_subjects
INNER JOIN subjects ON students_subjects.subject_id = subjects.id
WHERE students_subjects.class = $Class AND students_subjects.term_id = $Term
AND students_subjects.session_id = $Sessionn";
$subjects1_result = $conn->query($subjects1_query);
#The scores are displaying fine but i have not added an input to this one yet
<form action="" method="get">
<div class="row">
<div class="col-sm-12">
<div class="card card-table">
<div class="card-body">
<h4 class="form-title"><span>Ca Scores</span></h4>
<div class="table-responsive">
<?php
if ($subjects_result->num_rows > 0) {
$subjects = array();
while ($row = $subjects_result->fetch_assoc()) {
$subjects[] = $row['subject_name'];
}
// Get student names
$students_query = "SELECT students.id, students.student_firstname
FROM students
INNER JOIN students_subjects ON students.id = students_subjects.student_id
WHERE students_subjects.class = $Class AND students_subjects.term_id = $Term
AND students_subjects.session_id= $Sessionn
GROUP BY students.id";
$students_result = $conn->query($students_query);
if ($students_result->num_rows > 0) {
echo '<table class="table table-hover table-center mb-0 datatable"><tr><th>Student Name</th>';
// Table headers for subjects
foreach ($subjects as $subject) {
echo '<th>' . htmlspecialchars($subject) . '</th>';
}
echo '</tr>';
// Display student names and their scores
while ($student_row = $students_result->fetch_assoc()) {
echo '<tr><td>' . htmlspecialchars($student_row['student_firstname']) . '</td>';
foreach ($subjects as $subject) {
$student_id = $student_row['id'];
$score_query = "SELECT ca_score
FROM students_subjects
INNER JOIN subjects ON students_subjects.subject_id = subjects.id
WHERE students_subjects.class = $Class AND students_subjects.term_id = $Term
AND students_subjects.session_id= $Sessionn AND students_subjects.student_id = '$student_id' AND subjects.name = '$subject'";
$score_result = $conn->query($score_query);
if ($score_result->num_rows > 0) {
$score_row = $score_result->fetch_assoc();
echo '<td><input class="form-control text-center" value="' .htmlspecialchars($score_row['ca_score']). '" /></td>';
} else {
echo '<td>N/A</td>';
}
}
echo '</tr>';
}
echo '</table>';
} else {
echo "No students found for this class.";
}
} else {
echo "No subjects found for this class.";
}
?>
</div>
</div>
</div>
</div>
</div>
</form>
#This is the one I'm working with for now, it also works fine, it retrieves the data fine
but then I created an input so I can submit the form to update the scores. It shows update successful
but the db doesn't update.
<form id="editExamForm">
<div class="row">
<div class="col-sm-12">
<div class="card card-table">
<div class="card-body">
<h4 class="form-title"><span>Exam Scores</span></h4>
<div class="table-responsive">
<?php
if ($subjects1_result->num_rows > 0) {
$subjects1 = array();
while ($row1= $subjects1_result->fetch_assoc()) {
$subjects1[] = $row1['subjectt_name'];
}
// Get student names
$students_query = "SELECT students.id, students.student_firstname
FROM students
INNER JOIN students_subjects ON students.id = students_subjects.student_id
WHERE students_subjects.class = $Class AND students_subjects.term_id = $Term
AND students_subjects.session_id= $Sessionn
GROUP BY students.id";
$students_result = $conn->query($students_query);
if ($students_result->num_rows > 0) {
echo '<table class="table table-hover table-center mb-0 datatable"><tr><th>Student Name</th>';
// Table headers for subjects
foreach ($subjects1 as $subject1) {
echo '<th>' . 'IDDDDDDDD' . '</th>';
echo '<th>' . htmlspecialchars($subject1) . '</th>';
}
echo '</tr>';
// Display student names and their scores
while ($student_row = $students_result->fetch_assoc()) {
echo '<tr><td>' . htmlspecialchars($student_row['student_firstname']) . '</td>';
foreach ($subjects as $subject) {
$student_id = $student_row['id'];
$score_query = "SELECT student_id, exam_score
FROM students_subjects
INNER JOIN subjects ON students_subjects.subject_id = subjects.id
WHERE students_subjects.class = $Class AND students_subjects.term_id = $Term
AND students_subjects.session_id= $Sessionn AND students_subjects.student_id = '$student_id' AND subjects.name = '$subject'";
$score_result = $conn->query($score_query);
if ($score_result->num_rows > 0) {
$score_row = $score_result->fetch_assoc();
echo '<td><input class="form-control text-center" name="ids[]" value="' .htmlspecialchars($score_row['student_id']). '" /></td>';
echo '<td><input class="form-control text-center" name="scores[]" value="' .htmlspecialchars($score_row['exam_score']). '" /></td>';
} else {
echo '<td>N/A</td>';
}
}
echo '</tr>';
}
echo '</table>';
} else {
echo "No students found for this class.";
}
} else {
echo "No subjects found for this class.";
}
?>
</div>
</div>
</div>
<input class="form-control" type="submit" value="Update">
</div>
</div>
</form>
#This is the backend code to process the update
<?php
session_start();
if (isset($_SESSION['sessionn']) && !empty($_SESSION['class'])) {
$class = $_SESSION['class'];
$sessionn = $_SESSION['sessionn'];
$term = $_SESSION['term'];
// Connect to your database
#include('db-conn.php');
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "Sch_mgmt";
$conn = mysqli_connect($servername, $username, $password, $dbname);
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
$response = array(
'status' => 0,
'message' => 'Form submission failed, please try again.'
);
$id = $_POST['ids'][0];
$scores = $_POST['scores'][1];
// Check if the form has been submitted
// Iterate through the form inputs using a nested loop
foreach ($_POST['ids'] as $index => $id) {
// Update the "exam_score" column in the database
$sql = "UPDATE students_subjects SET exam_score = '".$_POST['scores'][$index]."' WHERE student_id = $id";
$result = mysqli_query($conn, $sql);
// Check for errors
if (!$result) {
$response['status'] = 0;
$response['message'] = "Error updating database for input";
# die("Error updating database for input $id: " . mysqli_error($conn));
}
}
// Overall success message
$response['status'] = 1;
$response['message'] = "All data updated successfully.";
}
echo json_encode($response);
// Close the database connection
mysqli_close($conn);
?>
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