Build a directory structure for a web application with client-facing resources, server-side logic, and configuration files.

Config/Database_Connect.php

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+```php
+<?php
+class Database_Connect {
+    private $host = 'localhost';
+    private $db_name = 'database_name';
+    private $username = 'username';
+    private $password = 'password';
+    private $conn;
+
+    public function connect() {
+        $this->conn = null;
+
+        try {
+            $this->conn = new PDO('mysql:host=' . $this->host . ';dbname=' . $this->db_name, $this->username, $this->password);
+            $this->conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+        } catch(PDOException $e) {
+            echo 'Connection Error: ' . $e->getMessage();
+        }
+
+        return $this->conn;
+    }
+}
+?>
+```

Private/Controllers/Schedule_Controller.php

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+```php
+<?php
+require_once '../Config/Database_Connect.php';
+require_once '../Models/Schedule_Model.php';
+
+class Schedule_Controller {
+    private $db;
+    private $scheduleModel;
+
+    public function __construct() {
+        $this->db = new Database_Connect();
+        $this->scheduleModel = new Schedule_Model($this->db->connect());
+    }
+
+    public function createSchedule($userId, $scheduleData) {
+        return $this->scheduleModel->create($userId, $scheduleData);
+    }
+
+    public function getSchedule($userId) {
+        return $this->scheduleModel->get($userId);
+    }
+
+    public function updateSchedule($userId, $scheduleData) {
+        return $this->scheduleModel->update($userId, $scheduleData);
+    }
+
+    public function deleteSchedule($userId) {
+        return $this->scheduleModel->delete($userId);
+    }
+}
+?>
+```

Private/Controllers/Shift_Controller.php

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+```php
+<?php
+require_once '../Config/Database_Connect.php';
+require_once '../Models/Shift_Model.php';
+
+class Shift_Controller {
+    private $db;
+    private $shiftModel;
+
+    public function __construct() {
+        $this->db = new Database_Connect();
+        $this->shiftModel = new Shift_Model($this->db->connect());
+    }
+
+    public function createShift($shiftData) {
+        return $this->shiftModel->createShift($shiftData);
+    }
+
+    public function getShifts() {
+        return $this->shiftModel->getShifts();
+    }
+
+    public function getShiftById($shiftId) {
+        return $this->shiftModel->getShiftById($shiftId);
+    }
+
+    public function updateShift($shiftId, $shiftData) {
+        return $this->shiftModel->updateShift($shiftId, $shiftData);
+    }
+
+    public function deleteShift($shiftId) {
+        return $this->shiftModel->deleteShift($shiftId);
+    }
+}
+?>
+```

Private/Controllers/User_Controller.php

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+```php
+<?php
+require_once '../Config/Database_Connect.php';
+require_once '../Models/User_Model.php';
+
+class User_Controller {
+    private $db;
+    private $userModel;
+
+    public function __construct() {
+        $this->db = new Database_Connect();
+        $this->userModel = new User_Model($this->db->connect());
+    }
+
+    public function registerUser($username, $password, $email) {
+        $hashedPassword = password_hash($password, PASSWORD_DEFAULT);
+        $result = $this->userModel->createUser($username, $hashedPassword, $email);
+
+        if($result) {
+            return array('status' => 'SUCCESS', 'message' => 'User registered successfully');
+        } else {
+            return array('status' => 'ERROR', 'message' => 'Failed to register user');
+        }
+    }
+
+    public function loginUser($username, $password) {
+        $user = $this->userModel->getUserByUsername($username);
+
+        if($user && password_verify($password, $user['password'])) {
+            return array('status' => 'SUCCESS', 'message' => 'User logged in successfully');
+        } else {
+            return array('status' => 'ERROR', 'message' => 'Invalid username or password');
+        }
+    }
+
+    public function updateUserProfile($username, $email) {
+        $result = $this->userModel->updateUser($username, $email);
+
+        if($result) {
+            return array('status' => 'SUCCESS', 'message' => 'User profile updated successfully');
+        } else {
+            return array('status' => 'ERROR', 'message' => 'Failed to update user profile');
+        }
+    }
+}
+?>
+```

Private/Models/Schedule_Model.php

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+```php
+<?php
+require_once '../Config/Database_Connect.php';
+
+class Schedule_Model {
+    private $db;
+
+    public function __construct() {
+        $this->db = new Database_Connect();
+        $this->db = $this->db->getDb();
+    }
+
+    public function getSchedule($id) {
+        $stmt = $this->db->prepare("SELECT * FROM schedules WHERE id = :id");
+        $stmt->execute(['id' => $id]);
+        return $stmt->fetch(PDO::FETCH_ASSOC);
+    }
+
+    public function createSchedule($data) {
+        $stmt = $this->db->prepare("INSERT INTO schedules (user_id, start_time, end_time) VALUES (:user_id, :start_time, :end_time)");
+        $stmt->execute(['user_id' => $data['user_id'], 'start_time' => $data['start_time'], 'end_time' => $data['end_time']]);
+        return $this->db->lastInsertId();
+    }
+
+    public function updateSchedule($id, $data) {
+        $stmt = $this->db->prepare("UPDATE schedules SET user_id = :user_id, start_time = :start_time, end_time = :end_time WHERE id = :id");
+        $stmt->execute(['id' => $id, 'user_id' => $data['user_id'], 'start_time' => $data['start_time'], 'end_time' => $data['end_time']]);
+        return $stmt->rowCount();
+    }
+
+    public function deleteSchedule($id) {
+        $stmt = $this->db->prepare("DELETE FROM schedules WHERE id = :id");
+        $stmt->execute(['id' => $id]);
+        return $stmt->rowCount();
+    }
+}
+?>
+```

Private/Models/Shift_Model.php

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+```php
+<?php
+require_once '../Config/Database_Connect.php';
+
+class Shift_Model {
+    private $db;
+
+    public function __construct() {
+        $this->db = new Database_Connect();
+        $this->db = $this->db->connect();
+    }
+
+    public function createShift($shiftData) {
+        $query = "INSERT INTO shifts (shift_name, start_time, end_time) VALUES (:shift_name, :start_time, :end_time)";
+        $stmt = $this->db->prepare($query);
+        $stmt->execute($shiftData);
+        return $this->db->lastInsertId();
+    }
+
+    public function getShift($shiftId) {
+        $query = "SELECT * FROM shifts WHERE id = :id";
+        $stmt = $this->db->prepare($query);
+        $stmt->execute(['id' => $shiftId]);
+        return $stmt->fetch(PDO::FETCH_ASSOC);
+    }
+
+    public function updateShift($shiftId, $shiftData) {
+        $query = "UPDATE shifts SET shift_name = :shift_name, start_time = :start_time, end_time = :end_time WHERE id = :id";
+        $stmt = $this->db->prepare($query);
+        $shiftData['id'] = $shiftId;
+        $stmt->execute($shiftData);
+        return $stmt->rowCount();
+    }
+
+    public function deleteShift($shiftId) {
+        $query = "DELETE FROM shifts WHERE id = :id";
+        $stmt = $this->db->prepare($query);
+        $stmt->execute(['id' => $shiftId]);
+        return $stmt->rowCount();
+    }
+}
+?>
+```

Private/Models/User_Model.php

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+```php
+<?php
+require_once '../Config/Database_Connect.php';
+
+class User_Model {
+    private $db;
+
+    public function __construct() {
+        $this->db = new Database_Connect();
+        $this->db = $this->db->getDb();
+    }
+
+    public function getUser($id) {
+        $stmt = $this->db->prepare("SELECT * FROM users WHERE id = :id");
+        $stmt->execute(['id' => $id]);
+        return $stmt->fetch(PDO::FETCH_ASSOC);
+    }
+
+    public function createUser($username, $password, $email) {
+        $stmt = $this->db->prepare("INSERT INTO users (username, password, email) VALUES (:username, :password, :email)");
+        $stmt->execute(['username' => $username, 'password' => password_hash($password, PASSWORD_DEFAULT), 'email' => $email]);
+        return $this->db->lastInsertId();
+    }
+
+    public function updateUser($id, $username, $password, $email) {
+        $stmt = $this->db->prepare("UPDATE users SET username = :username, password = :password, email = :email WHERE id = :id");
+        $stmt->execute(['id' => $id, 'username' => $username, 'password' => password_hash($password, PASSWORD_DEFAULT), 'email' => $email]);
+        return $stmt->rowCount();
+    }
+
+    public function deleteUser($id) {
+        $stmt = $this->db->prepare("DELETE FROM users WHERE id = :id");
+        $stmt->execute(['id' => $id]);
+        return $stmt->rowCount();
+    }
+}
+?>
+```

Private/Views/Schedule_View.php

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+```php
+<?php
+require_once '../Config/Database_Connect.php';
+require_once '../Models/Schedule_Model.php';
+
+class Schedule_View {
+    private $scheduleModel;
+
+    public function __construct() {
+        $this->scheduleModel = new Schedule_Model();
+    }
+
+    public function displayAllSchedules() {
+        $schedules = $this->scheduleModel->getAllSchedules();
+
+        foreach($schedules as $schedule) {
+            echo "<div class='schedule'>";
+            echo "<h2>" . $schedule['title'] . "</h2>";
+            echo "<p>" . $schedule['description'] . "</p>";
+            echo "<p>Start Date: " . $schedule['start_date'] . "</p>";
+            echo "<p>End Date: " . $schedule['end_date'] . "</p>";
+            echo "</div>";
+        }
+    }
+}
+?>
+```

Private/Views/Shift_View.php

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+```php
+<?php
+require_once '../Config/Database_Connect.php';
+require_once '../Models/Shift_Model.php';
+
+class Shift_View {
+    private $shiftModel;
+
+    public function __construct() {
+        $this->shiftModel = new Shift_Model();
+    }
+
+    public function displayShifts() {
+        $shifts = $this->shiftModel->getAllShifts();
+
+        foreach($shifts as $shift) {
+            echo "<div class='shift'>";
+            echo "<h2>" . $shift['shift_name'] . "</h2>";
+            echo "<p>Start Time: " . $shift['start_time'] . "</p>";
+            echo "<p>End Time: " . $shift['end_time'] . "</p>";
+            echo "</div>";
+        }
+    }
+}
+
+$shiftView = new Shift_View();
+$shiftView->displayShifts();
+?>
+```

Private/Views/User_View.php

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+```php
+<?php
+require_once '../Models/User_Model.php';
+require_once '../Config/Database_Connect.php';
+
+class User_View {
+    private $userModel;
+
+    public function __construct() {
+        $this->userModel = new User_Model(Database_Connect::getInstance());
+    }
+
+    public function displayUsers() {
+        $users = $this->userModel->getAllUsers();
+        foreach ($users as $user) {
+            echo "<div class='user'>";
+            echo "<h2>" . htmlspecialchars($user['name']) . "</h2>";
+            echo "<p>Email: " . htmlspecialchars($user['email']) . "</p>";
+            echo "<p>Role: " . htmlspecialchars($user['role']) . "</p>";
+            echo "</div>";
+        }
+    }
+}
+?>
+```