<?php
if(isset($_POST['submit'])) {
//get the name and comment entered by user
$firstName = $_POST['firstName'];
$lastName = $_POST['lastName'];
//connect to the database
$dbc = mysqli_connect('host', 'username', 'password', 'dbname') or die('Error connecting to MySQL server');
$check=mysqli_query($dbc,"select * from clients where firstname='$firstname' and lastname='$lastname'");
$checkrows=mysqli_num_rows($check);
if($checkrows>0) {
echo "customer exists";
} else {
//insert results from the form input
$query = "INSERT IGNORE INTO clients(firstName, lastName) VALUES('$firstName', '$lastName')";
$result = mysqli_query($dbc, $query) or die('Error querying database.');
mysqli_close($dbc);
}
echo "Customer Added";
};
?>
kolla bara efter rader i din db för förnamn och efternamn om det finns echo- ditt meddelande elseinsert