Connect to database

[inkmon]

I have a database called las created. I wish to connect to it via php
Could you advise the format of
dbhost = " ";
dbname = " ";
dbuser = "log in user name";
dbpassword= "log in password";
I have tried specifying the values including the domain as I thought it should be but have it wrong I have tried for instance "domain_las"; las being the database name. The other entries I have placed in like manner.

[Dratas]

In order to create MySQL database which is essential thing for most CMS and blog systems you must:
1. Login to DirectAdmin server control panel.
2. Locate MySQL Management.
3. Click on Create new Database.
4. Enter Database Name, Database Username, Username Password, Confirm Password.
5. Click Create.

[inkmon]

Thanks for reply but
I repeat
I have a database called las_art created. I wish to connect to it via php

I am asking how to specify the php connection algorithm to an already created database
my domain is las.jp22.net

I need to fill this statement but all combinations of entries I have tried have failed

if(!$dbConn = mysql_connect($dbhostname,$dbname,$dbusername,$dbpassword ))
die('I could not connect to the database. Clease check the inc_dbcon file and make sure everything is correct.');
if(!mysql_select_db($dbname, $dbConn))
die('I could not select the database. Check the inc_dbcon file and make sure everything is correct.');

for instance how do I fill this variable
$dbusername =" ";

I hope that stops confusion