Get up to 80 % extra points for free! More info:

Test data generator for PHP - Building a wrapper

In the previous lesson, Finishing the Image library for PHP, we designed a script and described what the core and entities will do. In today's tutorial, we're going to finish the core and fill our first database table with random names.

Database wrapper

Since our script will work with the database a lot, a very basic database wrapper simply won't do. Therefore, we're going to make it more sophisticated. Our script will be able to create a database table as well. That's why our database wrapper will include the createTableIf­NotExists() method. The wrapper will contain the insertInto(), connect(), and query() methods. All of the methods will be static. Name your database wrapper something like DatabaseManager.


The connect() method will be very simple. The database wrapper will have a private static $db attribute where a PDO instance will be stored. We'll create the instance in the connect() method. The method will accept 4 parameters: a server, a database name, a user, and a password. Then, we'll tell connect() to set the encoding to UTF-8. The connect() method will gather all of this together:

class DatabaseManager

    private static $db;

    static function connect($server, $db, $user, $password)
        self::$db = new PDO("mysql:host=$server;dbname=$db", $user, $password,
        array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8'));


The query() method will execute


...End of the preview...
Continue further

You will gain knowledge worth hundreds of thousands for a few crowns

You've come here and that's great! We believe that the first lessons showed you something new and useful
Do you want to continue the course? Go to the premium section.

Limited offer: Learn all knowledge and save money

Buy all currently available lessons with exercise submitting and other features for an exclusive price $9.99
Current account balance $0
By buying this exclusive package, you'll have access to all 26 lessons in this course including exercise submitting while saving $1.71. This offer is limited for the first lessons only with an additional exclusive 15% discount.

This article is licensed: Premium, by buying this article, you agree with the terms of use.

What will you get from us in the next lessons?
  • Unlimited and permanent access to individual lessons.
  • High quality IT knowledge.
  • Skills to help you get your dream and well-paid job.

Article description

Requested article covers this content:

In this tutorial, we'll finish the core used to generate random data into a MySQL database. We'll create a database wrapper and generate a table of names.

You gain credits by supporting our network. This is done by sending a helpful amount of money to support the site, or by creating content for the network.

Article has been written for you by David Capka
The author is a programmer, who likes web technologies and being the lead/chief article writer at He shares his knowledge with the community and is always looking to improve. He believes that anyone can do what they set their mind to.
Unicorn university David learned IT at the Unicorn University - a prestigious college providing education on IT and economics.