Untitled

<!doctype html>
<html>
<body>


<form action="index.php" method="post">
FirstName:<input type="text" name="fir"><br>
LastName:<input type="text" name="las"><br>
E-mail:<input type="text" name="email_l"><br>
<input type="submit" name="save">
<input type="submit" name"del_row" value="Delete">
</form>

<?php
$servername = "localhost";
$username = "root";
$password = '';
$dbname = "myDB";

$conn =  mysqli_connect($servername, $username, $password, $dbname);

// Check connection
if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}
else{
echo "Connected successfully";
echo "<br>";
}

$fir_del = $_POST['fir'];

if(isset($_POST['save'])){
  $sql = "INSERT INTO tars (firstname, lastname, email) VALUES
('".$_POST["fir"]."','".$_POST["las"]."','".$_POST["email_l"]."') ";
  $result = mysqli_query($conn,$sql);
}


if(isset($_POST['del_row'])){
  $sql_del = "DELETE FROM tars WHERE firstname=".$fir_del." ";
  $result_del = mysqli_query($conn,$sql_del) or die(mysqli_error());
}

 mysqli_close($conn);

?>

</body>
</html>