MongoDB 对象映射 (PHP)

MongoDB是一种流行的NoSQL数据库，它提供了强大的对象映射功能，使得在PHP中使用MongoDB变得更加简单和便捷。本文将介绍MongoDB对象映射的原理和使用方法，并通过一个案例代码来展示其实际应用。

composer require mongodb/mongodb

php
require 'vendor/autoload.php';
use MongoDB\Client;
$client = new Client("mongodb://localhost:27017");
$database = $client->selectDatabase("mydb");

php
namespace MyApp;
use MongoDB\BSON\ObjectId;
class User
{
    private $id;
    private $name;
    private $email;
    public function getId()
    {
        return $this->id;
    }
    public function getName()
    {
        return $this->name;
    }
    public function setName($name)
    {
        $this->name = $name;
    }
    public function getEmail()
    {
        return $this->email;
    }
    public function setEmail($email)
    {
        $this->email = $email;
    }
}

php
$user = new \MyApp\User();
$user->setName('John');
$user->setEmail('john@example.com');
$collection = $database->selectCollection('users');
$collection->insertOne($user);

php
$collection = $database->selectCollection('users');
$users = $collection->find();
foreach ($users as $user) {
    echo $user->getId() . ': ' . $user->getName() . ' - ' . $user->getEmail() . '
';
}

php
$collection = $database->selectCollection('users');
$filter = ['name' => 'John'];
$update = ['$set' => ['email' => 'new_email@example.com']];
$collection->updateOne($filter, $update);

php
$collection = $database->selectCollection('users');
$filter = ['name' => 'John'];
$collection->deleteOne($filter);