Develop a simple Web application that generates, from the database shown in the
ID: 3863129 • Letter: D
Question
Develop a simple Web application that generates, from the database shown in the appendix, a simplified student transcript given his user name and password. The site consists of three (3) modules, you name: login.php, register.php and generate.php In the login.php you just validate that the student has entered a username and a password. If valid redirect the user to the generate.php by clicking on the link Generate Report Otherwise notify the user that the username and password are required. 2. n the generate.php, do the following Check whether the student is registered (use query Q1). If not, direct the student to register.php by clicking on Registration Page Otherwise: Generate the transcript using query Q2 Format the output in a table as shown in Figure 2. Compute the average gpa from the database, using the query Q3 Update the student's gpa n the table students setting it with the grade defined in query Q3 Query Q1: check (with un an pw) if the student who attempts to login is registered Query Q2: generate the transcript for the logged student from transcript where un xxx (where 'xxx' is the username of the logged student and grade is the output of query) Query Q4: update the logged student setting the gpa to grade login.phpExplanation / Answer
login.php
<html>
<style type="text/css">
#container{
height: 200px;
width:500px;
margin:50px auto;
border: 1px solid #000;
text-align: center;
padding: 15px;
}
input, label{
display: inline-block;
width: 100px;
margin: 5px 0;
}
</style>
<script type="text/javascript">
</script>
<body>
<div id="container">
<?php
if(!empty($_POST['username']) && !empty($_POST['password']) && !empty($_POST['email'])){
$conn = new mysqli("localhost", "root", "", "cheggPrj");
$username = trim($_REQUEST['username']);
$password = trim($_REQUEST['password']);
$email = trim($_REQUEST['email']);
$stud_ins_qry = "insert into student (un, pw, email, gpa) values ('$username', '$password', '$email', 0)";
if ($conn->query($stud_ins_qry) === TRUE) {
echo "Registered Successfully,<br> Plase login";
}else{
echo "Alredy registered,<br> Plase login";
}
}
?>
<form action="generate.php" method="post">
<div>
<label for="username">User name:</label>
<input type="text" name="username" id="username">
</div>
<div>
<label for="password">Password:</label>
<input type="password" name="password" id="password">
</div>
<div>
<input type="submit" name="submit" id="submit" value="Login">
</div>
</form>
</div>
</body>
</html>
<?php
?>
---------------------------------------------------------------
generate.php
<html>
<style type="text/css">
#container{
height: 200px;
width:500px;
margin:50px auto;
text-align: center;
padding: 15px;
}
input, label{
display: inline-block;
width: 100px;
margin: 5px 0;
}
table{
border: 1px solid #000;
border-collapse: collapse;
}
table tr td{
border: 1px solid #000;
}
</style>
<script type="text/javascript">
</script>
<body>
<div id="container">
<?php
$conn = new mysqli("localhost", "root", "", "cheggPrj");
$username = trim($_REQUEST['username']);
$password = trim($_REQUEST['password']);
$usr_query = "select * from student where un='".$username."' and pw='".$password."'";
$res = mysqli_query($conn, $usr_query);
if ($res) {
while ($row=mysqli_fetch_assoc($res)) {
$username = $row['un'];
$email = $row['email'];
$gpa = $row['gpa'];
}
if($username == "YB"){
$trans_ins_qry1 = "insert into transcript (un, cn, lg, ng) values ('$username', 'COMP2102', 'A-', 3.5)";
if ($conn->query($trans_ins_qry1) === TRUE) {
}
$trans_ins_qry2 = "insert into transcript (un, cn, lg, ng) values ('$username', 'COMP3700', 'B', 3)";
if ($conn->query($trans_ins_qry2) === TRUE) {
}
}else{
$trans_ins_qry1 = "insert into transcript (un, cn, lg, ng) values ('$username', 'COMP2102', 'B+', 3.2)";
if ($conn->query($trans_ins_qry1) === TRUE) {
}
$trans_ins_qry2 = "insert into transcript (un, cn, lg, ng) values ('$username', 'COMP3700', 'B', 3)";
if ($conn->query($trans_ins_qry2) === TRUE) {
}
}
$sel_query = "select sum(ng)/count(ng) grade from transcript where un='$username'";
$res = mysqli_query($conn, $sel_query);
if ($res) {
while ($row=mysqli_fetch_assoc($res)) {
$grade = $row['grade'];
}
}
$update_query = "update student set gpa=$grade where un='".$username."'";
$res = mysqli_query($conn, $update_query);
}else{
echo '<a href="register.php">Registration page</a>';
}
?>
<table>
<tr>
<td colspan="3">
Welcome <?php echo $username; ?>
<br>
Here is your transcript
</td>
</tr>
<tr>
<td>
Course Code
</td>
<td>
Letter Grade
</td>
<td>
Number Grade
</td>
</tr>
<?php
$sel_query = "select * from transcript where un='$username'";
$res = mysqli_query($conn, $sel_query);
if ($res) {
while ($row=mysqli_fetch_assoc($res)) {
?>
<tr>
<td>
<?php echo $row['cn']; ?>
</td>
<td>
<?php echo $row['lg']; ?>
</td>
<td>
<?php echo $row['ng']; ?>
</td>
</tr>
<?php
}
}
?>
<tr>
<td colspan="2">
Total Average
</td>
<td>
<?php echo $grade; ?>
</td>
</tr>
<tr>
<td colspan="3">
</td>
</tr>
</table>
</div>
</body>
</html>
----------------------------------------------------------------
register.php
<html>
<style type="text/css">
#container{
height: 200px;
width:500px;
margin:50px auto;
border: 1px solid #000;
text-align: center;
padding: 15px;
}
input, label{
display: inline-block;
width: 100px;
margin: 5px 0;
}
</style>
<script type="text/javascript">
</script>
<body>
<div id="container">
<form action="login.php" method="post">
<div>
<label for="username">User name:</label>
<input type="text" name="username" id="username">
</div>
<div>
<label for="password">Password:</label>
<input type="password" name="password" id="password">
</div>
<div>
<label for="email">Email:</label>
<input type="text" name="email" id="email">
</div>
<div>
<input type="submit" name="submit" id="submit" value="Register">
</div>
</form>
</div>
</body>
</html>
<?php
?>
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