Наваял некоторый пример как работать с MongoDB на будущее пригодиться

<?php
 
class VtUsers {
 
    /** @var MongoDB $db */
    private $db;
 
    public function __construct($mongo_url, $dbname)
    {
        $this->db = (new MongoClient($mongo_url))->__get($dbname);
    }
 
    public function add($username, $password, $mailaddr)
    {
        $registred = $this->get($username, false);
        if ( $registred ) return false;
        $this->db->users->insert([
            'username'  => $username,
            'password'  => md5($password),
            'mail'      => $mailaddr,
            'registred' => new MongoDate()
        ]);
    }
 
    public function ignorecase($string)
    {
        return new MongoRegex('/^' . preg_quote(strtolower($string), '/') . '$/i');
    }
 
    public function mkdate(DateTime $datetime)
    {
        return new MongoDate($datetime->getTimestamp());
    }
 
    public function get($username, $good_users=true)
    {
        $selector = [
            'username' => $this->ignorecase($username)
        ];
        if ( $good_users ) {
            $selector['disabled'] = ['$ne' => 1];
            $selector['inactive'] = ['$ne' => 1];
        }
        return $this->db->users->findOne($selector);
    }
 
}
 
//$url = 'mongodb://eugene:password@localhost:27017/';
$usr = new VtUsers('mongodb://localhost:27017', 'billing_lan');
print_r( $usr->get('LikePro'));
 
/*
if ( ! $modb->users->findOne(['username'=>new MongoRegex($username)])) {
    $modb->users->insert([
        'username'=>'Eugene',
        'password'=>'password',
        'mail'=>'example@example.com',
        'registred'=>new MongoDate()
    ]);
}
$cursor = $modb->users->find(['username'=>new MongoRegex($username)]);
foreach ( $cursor as $document ) { print_r($document); }