Untitled

<?php
error_reporting(0);
?>

<!DOCTYPE html>
<html>
<head>
    <title>Program</title>
</head>
<body>
<form action="" method="post">
    <p>Roll no</p>
    <input type="number" name="roll" placeholder="Enter Roll no">
    <p>Name</p>
    <input type="text" name="name" placeholder="Enter Name">
    <p>Course name</p>
    <input type="text" name="dept" placeholder="Enter Course name">
    <br> <br>
    <input type="submit" name="submit">
</form>
</body>
</html>

<?php
if(isset($_POST['submit'])){
$roll = $_POST["roll"];
$name = $_POST["name"];
$dept = $_POST["dept"];
$dbhost = "localhost";
$dbuser = "root";
$dbpass = "";
$dbname = "db5";
$conn = mysqli_connect($dbhost,$dbuser,$dbpass,$dbname);
$query = "INSERT INTO student (roll,name,dept) VALUES ('$roll','$name','$dept')";
$data = mysqli_query($conn,$query);
if($data)
{
    echo "Submitted";
}
else
{
    mysql_error();
}
}
?>