php7 mongo查询findOne的问题

我有Ubuntu 16.04,PHP7和mongo.

更新系统后,我的代码不起作用…我有一个新版本的PHP.

在更新之前,我的代码是：

  // connect
  $m = new MongoClient();
  // select a database
  $db = $m->clients;
  // select a collection (analogous to a relational database's table)
  $collection = $db->suscriptions;
  // Check if exists in DB
  $query = array('email' => $email);
  $cursor = $collection->findOne($query);

更新后,我按照PHP文档的指示更改了连接,但是我无法进行任何查询…
这是我的代码,如果我删除最后一行,代码将起作用：

  // connect
  $m = new MongoDB\Driver\Manager("mongodb://localhost:27017");
  // select a database
  $db = $m->clients;
  // select a collection (analogous to a relational database's table)
  $collection = $db->suscriptions;
  // Check if exists in DB
  $query = array('email' => $email);
  // Problem
  $cursor = $collection->findOne($query);

你能帮助我吗？谢谢！

解决方法:

您使用的Manager API错误.

$m = new MongoDB\Driver\Manager("mongodb://localhost:27017");
$filter= array('email' => $email);
$options = array(
  'limit' => 1
);
$query = new MongoDB\Driver\Query($filter, $options);
$rows = $m->executeQuery('clients.suscriptions', $query);

或者,您应该通过composer安装该库,该库提供的语法与旧api类似.

require 'vendor/autoload.PHP';
$m= new MongoDB\Client("mongodb://127.0.0.1/");
$db = $m->clients;
$collection = $db->suscriptions;
$query = array('email' => $email);
$document = $collection->findOne($query);

https://docs.mongodb.com/php-library/master/tutorial/crud/#find-one-document