insert.php

<?php include('config.php'); ?>
<h1>Insert New</h1>
<table>
	<form method="post">
		<tr>
			<td>Test Name</td>
			<td><input type="text" name="testname"></td>
		</tr>
		<tr>
			<td>Test Fee</td>
			<td><input type="number" name="testfee"></td>
		</tr>
		<tr> 
			<td><input type="submit" name="btn" value="Insert"></td>
		</tr>
	</form>
</table>

<?php
	if(isset($_POST['btn'])) {
		$testname = $_POST['testname'];
		$testfee = $_POST['testfee'];
		$res = mysqli_query($con,"INSERT INTO test (test_name,test_cost) VALUES ('$testname','$testfee')");
		if($res==1) {
			?>
			<script>
				alert ("Insertion Sucesssful");
				window.location.href="update.php";
			</script>
			<?php
		} else {
			?>
			<script>
				alert ("Insertion Unucesssful");
				window.location.href="update.php";
			</script>
			<?php
		}
	}
	?>