JQuery Ajax and PHP MVC Model

I am creating a small application with jQuery and PHP. JQuery (index.html) adds form fields to the user and submits them to PHP Script (pdo.php). The PHP script extracts the values ​​from the database and performs some calculations with the User data, data and values ​​from the database. The amount is returned to the form page.

index.html ↔ pdo.php

So, I am trying to understand the PHP MVC pattern, my question is what

a.), that would make sense in this case.

b.) if so, which part would be which. index.html → view; pdo.php → model; controller →?

thank you for your help,

Tony

Cutaway

jquery ... index.html

$(document).ready(function(){
    $("#buttonAjax").click(function(){
        var name = encodeURI($("#name").val());

            $.ajax({
                type: "POST",
                url: "pdo.php",
                data: "name="+name,
                success: function(data){
                    var json = $.parseJSON(data);
                    $("#output").html(json.summe);
                    talk(json.say);
                }
            });

    });

    function talk (say){
        jQuery.noticeAdd({text: say,stay: false});
    }

     });

pdo.php

/* DB Connection */
    $strDbLocation = 'mysql:dbname=test;host=localhost';
    $strDbUser = 'root';
    $strDbPassword = 'root';

    try{
        $objDb = new PDO($strDbLocation, $strDbUser, $strDbPassword);
    }
    catch (PDOException $e){
        echo 'Failure: ' . $e->getMessage();
    }


/* Fetch POST Data */
    $id = $_POST['name'];


/* Build query */
    $dbSelect =  $objDb->prepare("SELECT Age,Name FROM Benutzer WHERE id = :id");
    $dbSelect -> setFetchMode(PDO::FETCH_ASSOC);  
    $dbSelect -> bindParam('id', $id);
    $dbSelect -> execute();


/* Output + Calculate */    
    while($row = $dbSelect->fetch()) {  
        $total =  $row['Age'] / 100 . "<br />";
    }  


/* Return to User */
    if(!empty($total)){ 
        $ret = Array("summe" => "Summe: " . $total, "say" => "all right");
        echo json_encode($ret); }
    else{
        $ret = Array("summe" => "Nothing for you",  "say" => "nothing for you");
        echo json_encode($ret); 
    }