Building RESTful Web Services with PHP 7

DB class

Here is the code of the DB class in blog/core/DB.php:

<?phpclass DB {    function connect($db)    {        try {            $conn = new PDO("mysql:host={$db['host']};dbname=blog", $db['username'], $db['password']);            // set the PDO error mode to exception            $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);            return $conn;        } catch (PDOException $exception) {            exit($exception->getMessage());        }    }}

This class is related to the database. Right now, we have a constructor that is actually connecting to the database using PDO and $db arrays defined in blog/config.php. However, we will add more in this class later.

You can see we are using a PDO object here: PDO (PHP Data Objects). It is used to interact with databases and is a recommended one because it ...