Chances are by now you've heard about some of the NoSQL document-based database alternatives to the usual RDBMS systems like MongoDb or CouchDb. In this recent post there's an introduction helping you get started with PHP and MongoDb.
Web development industry is moving so fast and new solutions like NoSql is getting popular day by day. Most of the web developer and software engineers are familiar with db like Mysql.And there are specific use cases when to MongoDb and when to use Mysql. You can check this interesting discussion from here to be clear.
The post takes you through a three-step process to getting the MongoDb extension for PHP installed, installing the MongoDb database instance and getting it running and a sample script to connect the two. They also suggest two books if you'd like to get more in-depth with MongoDb and its use.