Introduction to how to upgrade PHP7 to operate MongoDB

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Preface

There are many users using PHP MongoDB because MongoDB is very convenient for storing unstructured data. In PHP5 and before, two official extensions are provided, Mongo and MongoDB, where Mongo is an extension to MongoClient It is very convenient to operate on several core classes based categories, so the Mongo extension is basically chosen.

But with the upgrade of PHP5 to PHP7, the official no longer supports the Mongo extension, only MongoDB, and The performance improvement of PHP7 is so huge that people cannot let it go, so how to replace Mongo with MongoDB has become an urgent problem to be solved. MongoDB introduces namespace, but the function encapsulation is very poor. If you have to use native extensions, it almost means writing native Mongo statements. This idea goes against the idea of ​​ORM simplifying the syntax problems caused by DB IO operations and focusing on logic optimization.

Under this situation, MongoDB officials couldn't help it. In order to facilitate use and increase market share, they launched a library based on MongoDB extension:

MongoDB driver

If you use the original driver, the general syntax is as follows:

<?php

use MongoDB\Driver\Manager;
use MongoDB\Driver\BulkWrite;
use MongoDB\Driver\WriteConcern;
use MongoDB\Driver\Query;
use MongoDB\Driver\Command;

class MongoDb {

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