<?php
$servername = "localhost";
$username = "root";
$password = "l1j1p1s3rv3!";
$dbname = "demodb";
$fname=$_POST["fname"];
$lname=$_POST["lname"];

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$query=mysql_query("SELECT f_name,l_name FROM t_name WHERE f_name='$fname' AND l_name='$lname'");
if($query==TRUE)
{
echo "Name already exists";}
else
{
$sql = "INSERT INTO t_name (f_name, l_name)
VALUES ('$fname','$lname')";
if($conn->query($sql)===TRUE)
{echo "New record created successfully"; }

 else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}
}

$conn->close();
?>