分享一个很有用的php7+mongodb类！

由于项目需要，把项目升级到了php7。但是升级了之后发现mongo扩展不能用了。php7.0以上只支持mongodb扩展了。而mongodb扩展的驱动使用起来比monmgo扩展显得很复杂，啰嗦。在网上找了很久。终于找到了一个比较简洁的mongodb类。语法跟mongo的差不多。清晰，自然。

项目地址https://github.com/mongodb/mongo-php-library

因为项目是国外友人贡献的。所以没有可以看的很明白的文档。这里整理了一些常用的方法。

获取实例

$uri = "mongodb://username:password@host/database";
$client = new \MongoDB\Client($uri);

获取集合

$collection = $client->selectCollection('test','test');

获取一条数据

$data = $collection->findOne(['id'=>1]);

获取多条数据

$where = ['type'=>1];
$options = array(
    'projection' => array('id' => 1, 'age' => 1, 'name' => -1), // 指定返回哪些字段 1 表示返回 -1 表示不返回
    'sort' => array('id' => -1), // 指定排序字段
    'limit' => 10, // 指定返回的条数
    'skip' => 0, // 指定起始位置
);
$data = $collection->find($where,$options)->toArray();
var_dump($data);

去重

$fileName = 'name';
$where = ['id' => ['$lt' => 100]]
$ret = $this->collection->distinct($fileName,$where);

插入一条数据

$data = array(
    'id' => 2,
    'age' => 20,
    'name' => '张三'
);
$ret = $collection->insertOne($data);
$id=$ret->getInsertedId();

批量插入

$data = array(
    ['id' => 1, 'age' => 21, 'name' => '1xiaoli'],
    ['id' => 2, 'age' => 22, 'name' => '2xiaoli'],
    ['id' => 3, 'age' => 23, 'name' => '3xiaoli'],
    ['id' => 4, 'age' => 26, 'name' => '4xiaoli'],
    ['id' => 5, 'age' => 24, 'name' => '5xiaoli'],
    ['id' => 6, 'age' => 25, 'name' => '6xiaoli'],
);
$ret = $collection->insertMany($data);
# 返回插入id
var_dump($ret->getInsertedIds());

更新一条

$ret = $collection->updateOne(array('id' => 2), array('$set' => array('age' => 56)));

更新多条

$ret = $collection->updateMany(array('id' => ['$gt' => 1]), array('$set' => array('age' => 56, 'name' => 'x')));

删除一条

$ret = $collection->deleteOne(array('id' => 2));

删除多条

$collection->deleteMany(array('id' => array('$in' => array(1, 2))));

聚合

$ops = [
    [
        '$match' =>['type'=>['$in'=>[2,4]]]
    ],
    [
        '$sort' => ['list.create_time' => -1]  //sort顺序不能变，否则会造成排序混乱，注意先排序再分页
    ],
    [
        '$skip' => 0
    ],
    [
        '$limit' => 20000
    ],
];
$data = $collection->aggregate($ops);
foreach ($data as $document)
{
    var_dump($document);
}