<p style='display: inline-block;'>
<?php
$a= $_POST['a'];
$b= $_POST['b'];
echo 'Sent Values: ';
echo $a.','.$b;
?>
</p>

<?php

/*<Insert values into Data Base>*/

$db_servername = 'localhost';
$db_username = 'jd';
$db_password = '1234';
$db_name = 'xxx';

$db_connect = new mysqli($db_servername, $db_username, $db_password, $db_name);

$db_query = "INSERT INTO sometable (a,b) VALUES ('$a','$b')";

$db_result= $db_connect->query($db_query);

/*</Insert values into Data Base>*/

?>