If you are facing trouble to connect to your MySQL database you can use the following code to check the database connection:
<?php
$dbhost = 'localhost'; // Your MySQL server host
$dbuser = 'dbuser'; // MySQL database user
$dbpass = 'password'; // Password for MySQL database User
$conn = mysql_connect($dbhost, $dbuser, $dbpass) or
die ('Error connecting to mysql');
$dbname = 'database_name';
mysql_select_db($dbname);
?>
Regards,
Kevin