PHP database connection scaffolding: quickly generate reusable and maintainable connection code

In PHP, connection scaffolding simplifies the creation of database connection code and provides reusable and maintainable connections. The specific steps are as follows: Use composer to install the Zend\Db\Adapter\Adapter component. Create an adapter object, specifying the database driver, connection information, and credentials. Adapters can be reused throughout the application, accessed through reference variables. Inject adapters into controllers to eliminate duplicate connection logic.

PHP database connection scaffolding: reusable and maintainable connections

In PHP, the writing of database connection code is usually Tedious and error-prone. To simplify this process, you can use connection scaffolding, which can quickly generate reusable, maintainable connection code.

Install

composer require zendframework/zend-db

Create scaffolding

use Zend\Db\Adapter\Adapter;

$adapter = new Adapter([
    'driver' => 'Pdo',
    'dsn' => 'mysql:host=localhost;dbname=testdb',
    'username' => 'username',
    'password' => 'password',
]);

This will create A new adapter that connects to a MySQL database named "testdb" database. Other database drivers can also be used, such as PostgreSQL or SQLite.

Reuse Connections

After you create an adapter, you can reuse it throughout your application. Just access it by referencing the variable:

$result = $adapter->query('SELECT * FROM users');

Practical case

Suppose there is a controller that needs to read and update data from the database:

class UserController {

    protected $adapter;

    public function indexAction()
    {
        $result = $this->adapter->query('SELECT * FROM users');
        return $result;
    }

    public function updateAction()
    {
        $result = $this->adapter->query('UPDATE users SET name = "New Name" WHERE id = 1');
        return $result;
    }
}

Using scaffolding, the controller can inject the adapter through the constructor, eliminating repeated connection logic:

class UserController {

    protected $adapter;

    public function __construct(Adapter $adapter)
    {
        $this->adapter = $adapter;
    }

    public function indexAction()
    {
        $result = $this->adapter->query('SELECT * FROM users');
        return $result;
    }

    public function updateAction()
    {
        $result = $this->adapter->query('UPDATE users SET name = "New Name" WHERE id = 1');
        return $result;
    }
}

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