MongoDB 4 Quick Start Guide

Core PHPLIB class instances needed for CRUD operations

It is important to note that all of the CRUD operations that we are going to discuss require that you create a MongoDB\Collection instance. This can be accomplished in several ways, including:

• MongoDB\Client::selectCollection()
• MongoDB\Database::selectCollection()
• MongoDB\Collection::__construct()

Of the three choices, we will focus on the first, since the MongoDB\Client consumes the database and thus provides more flexibility. To create a MongoDB\Client instance, proceed as follows:

1. First, define a connection string URI following this format:

      mongodb://[username:password@]host[:port][/[database][?options]]

2. Create a MongoDB\Client instance using the URI as an argument:

 $client ...