Categories Of Web Hostings

Free web hosting service
Shared web hosting service
Reseller web hosting
Virtual Dedicated Server
Dedicated hosting service
Managed hosting service
Colocation web hosting service

Cloud Hosting: is a new type of hosting platform that allows customers powerful, scalable and reliable hosting based on clustered load-balanced servers and utility billing.

Grid hosting: this form of distributed hosting is when a server cluster acts like a grid and is composed of multiple nodes.

Domain

1.Domain Name System (DNS), an hierarchical naming system for computers or any resource connected to the Internet.
2.Domain model, a conceptual model of a system that describes the various entities involved and their relationships
3.Domain name registrar, an organization that manages the reservation of Internet domain names in one or more domains.

Web Site

A web site is a collection of related web pages, images, videos or other digital assets that are addressed relative to a common Uniform Resource locator (URL), often consisting of only the domain name, or the IP address, and the root path ('/') in an Internet Protocol-based network.

A web page is a document, typically written in plain text interspersed with formatting instructions of Hypertext Markup Language (HTML,XHTML).

What is MySQL?

1.MySQL is a database.
2.The data in MySQL is stored in database objects called tables.
3.A table is a collections of related data entries and it consists of columns and rows.

Queries:

A query is a question or a request.

With MySQL, we can query a database for specific information and have a recordset returned.

Create a Connection to a MySQL Database

Code:

$con = mysql_connect("localhost","peter","abc123");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
?>

Closing a Connection in PHP & MySQL.

Code:

$con = mysql_connect("localhost","peter","abc123");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_close($con);
?>

Create Database and Tables in MySQL

Code:

$con = mysql_connect("localhost","peter","abc123");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
if (mysql_query("CREATE DATABASE my_db",$con))
{
echo "Database created";
}
else
{
echo "Error creating database: " . mysql_error();
}
mysql_close($con);
?>