diff --git a/hw12/index.php b/hw12/index.php
new file mode 100644
index 000000000..c6200bedf
--- /dev/null
+++ b/hw12/index.php
@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types = 1);
+
+require __DIR__ . '/vendor/autoload.php';
+
+$host = '';
+$database = '';
+
+try {
+    $user = new UserController($host, $database);
+} catch (Exception $exception) {
+    echo $exception->getMessage();
+}
diff --git a/hw12/src/controller/UserController.php b/hw12/src/controller/UserController.php
new file mode 100644
index 000000000..ce4b23af9
--- /dev/null
+++ b/hw12/src/controller/UserController.php
@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types = 1);
+
+use Veraadzhieva\Hw12;
+use Veraadzhieva\Hw12\Model\User;
+use Veraadzhieva\Hw12\Model\UserMapper;
+
+class UserController
+{
+    private $mapper;
+
+    public function __construct($host, $database) {
+        $this->mapper = new UserMapper($host, $database);
+    }
+
+    public function insertUser($params) {
+        try {
+            $this->mapper->insert($params['username'], $params['phone']);
+        } catch (Exception $e) {
+            return $e->getMessage();
+        }
+    }
+
+    public function updateUser($params) {
+        try {
+            $this->mapper->update($params);
+        } catch (Exception $e) {
+            return $e->getMessage();
+        }
+    }
+
+    public function deleteUser(User $user) {
+        try {
+            $this->mapper->delete($user);
+        } catch (Exception $e) {
+            return $e->getMessage();
+        }
+    }
+
+    public function selectUserById($id) {
+        try {
+            $this->mapper->findById($id);
+        } catch (Exception $e) {
+            return $e->getMessage();
+        }
+    }
+}
\ No newline at end of file
diff --git a/hw12/src/model/User.php b/hw12/src/model/User.php
new file mode 100644
index 000000000..527c6a603
--- /dev/null
+++ b/hw12/src/model/User.php
@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Veraadzhieva\Hw12\Model;
+
+class User
+{
+    private $id;
+    private $username;
+    private $phone;
+
+    public function __construct($username, $phone) {
+        $this->username = $username;
+        $this->phone = $phone;
+    }
+
+    public function getId()
+    {
+        return $this->id;
+    }
+
+    public function getUsername()
+    {
+        return $this->username;
+    }
+
+    public function getPhone()
+    {
+        return $this->phone;
+    }
+}
\ No newline at end of file
diff --git a/hw12/src/model/UserMapper.php b/hw12/src/model/UserMapper.php
new file mode 100644
index 000000000..91efc7052
--- /dev/null
+++ b/hw12/src/model/UserMapper.php
@@ -0,0 +1,88 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Veraadzhieva\Hw12\Model;
+
+use Veraadzhieva\Hw12\Model\User;
+use PDO;
+
+class UserMapper
+{
+    private $connection;
+
+    public function __construct($host, $database) {
+        $this->connection = new PDO("mysql:host=$host;dbname=$database");
+    }
+
+
+    /**
+     * Создание нового пользователя.
+     *
+     * @param string $username
+     * @param int $phone
+     */
+    public function insert($username, $phone)
+    {
+        return new User($username, $phone);
+    }
+
+    /**
+     * Обновление пользователя.
+     *
+     * @param array $params
+     */
+    public function update($params)
+    {
+        $user = $this->findById($params['id']);
+        if ($params['username'] && $params['username'] !== $user->getUsername()) {
+            $query = 'UPDATE users SET username=? WHERE id=?';
+            $this->connection->query($query,
+                array(
+                    $params['username'],
+                    $user->getId()
+                ));
+        }
+        if ($params['phone'] && $params['phone'] !== $user->getPhone()) {
+            $query = 'UPDATE users SET phone=? WHERE id=?';
+            $this->connection->query($query,
+                array(
+                    $params['phone'],
+                    $user->getId()
+                ));
+        }
+    }
+
+    /**
+     * Удаление пользователя из бд.
+     *
+     * @param User $user
+     */
+    public function delete(User $user)
+    {
+        $query = 'DELETE FROM users WHERE id = ?';
+        $this->connection->query($query, array($user->getId()));
+    }
+
+    /**
+     * Поиск пользователя по id.
+     *
+     * @param int $userId
+     * @return User|null
+     */
+    public function findById($userId)
+    {
+        $sql = "SELECT id, username, phone FROM users WHERE id = ?";
+
+        $data = $this->connection->fetchRow($sql, array($userId), Zend_Db::FETCH_ASSOC);
+
+        $user = null;
+
+        if ($data != false)
+        {
+            $user = $this->insert($data);
+        }
+
+        return $user;
+    }
+}
\ No newline at end of file