php delete row mysql

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

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);

 // Check connection

 if ($conn->connect_error) {

    die("Connection failed: " . $conn->connect_error);
}


 
// sql to delete a record

 $sql = "DELETE FROM MyGuests WHERE id=3";

 
if ($conn->query($sql) === TRUE) {
    echo "Record deleted successfully";
} else {
    echo "Error deleting record: " . $conn->error;
}

$conn->close();

?>