Untitled

<?php
 $dbaddr = "localhost:3306";
 $user="root";
 $pass ="";
 $con = mysqli_connect($dbaddr,$user,$pass,"student");
if(!$con){ echo "cannot connect to server";}
else{ echo"server connected";}

$name =$_POST["name"];
$enroll =$_POST["e_no"];
$sem =$_POST["sem"];
$year =$_POST["year"];
echo $name ."". $enroll."".$sem."".$year;
$q1 ="INSERT INTO stud VALUES($name,$enroll,$sem,$year)";
if(mysqli_query($con,$q1)){echo"query executed";}
else{ echo "not executed";}
$res = mysqli_query($con,"SELECT * FROM stud");
$r = $res->fetch_assoc();
		echo "<html>
				<body>
					<table>
						<tr>
							<th>name</th>
							<th>enroll</th>
							<th>sem</th>
							<th>year</th>
						</tr>
						<tr>
							<td>{$r['name']}</td>
							<td>{$r['enrollment']}</td>
							<td>{$r['semester']}</td>
							<td>{$r['year']}</td>
						</tr>
					</table>
				</body>
			 </html>
		";


?>