I'm trying to create a basic website using MVC in PHP to learn MVC. Its eventually going to be some sort of social networking website but right now I am trying to create a object that can create, delete, update members. What I've done so far for the Model is in the code below, I figure my Controller will take user input and build the array of data that are then passed to this Model. Am I designing this correctly? Should the Controller be the one building the Arrays?

<?php
class Connection {
private $server;
private $database;
private $user;
private $password;
private $conn;

function __construct($server, $database, $user, $password) {
    $this->server = $server;
    $this->database = $database;
    $this->user = $user;
    $this->password = $password;

}

function connect() {
    $this->conn = mysql_connect($this->server, $this->user, $this->password) or die(mysql_error());

    if (!(mysql_select_db($this->database))) {
        throw new Exception("Could not connect to database!");
    }
}

function deleteMember($memberId) {
    $queryString = "DELETE FROM Members WHERE MemberId=" . $memberId . ';';

    if (!mysql_query($queryString)) {
        throw new Exception("Failed Deleting Member!");
    }
}

function insertMember($columns) {
    $queryString = 'INSERT INTO Members';
    $keys = '(';
    $values = '(';
    $count = 0;

    foreach($columns as $key => $value) {
        $keys .= $key;
        $values .= $value;

        if (!(++$count == count($columns))) {
            $keys .= ',';
            $values .= ',';
        }
    }

    $queryString .= $keys . ')' . ' VALUES ' . $values . ');';

    if (!mysql_query($queryString, $this->conn)) {
        throw new Exception('Failed Inserting Member!');
    }
    else
    {
       return mysql_insert_id();
    }
}

function updateMember($memberId, $columns) {
    $queryString = 'UPDATE Members SET ';
    $count = 0;

    foreach($columns as $key => $value) {
        $queryString .= $key . '=' . $value;

        if (!(++$count == count($columns))) {
            $queryString .= ', ';
        }
    }

    $queryString .= ' WHERE MemberId=' . $memberId . ';';

    if (!mysql_query($queryString)) {
        throw new Exception('Failed Updating Member');
    }
}

function getMembers() {
    $queryString = "SELECT * FROM Members;";
    $result = mysql_query($queryString);
    $memberArray = array();
    $count = 0;

    while ($row = mysql_fetch_array($result)) {
        $memberArray[$count++] = "Member ID: " . $row['MemberId'] . " Name: " . $row['MemberName'] . " Email: " . $row['MemberEmail'];
    }

    return $memberArray;
}

function disconnect() {
    mysql_close($this->conn);
}
 }