Testing MySQL
Testing MySQL is not exactly easy. However, here are the common connection strings for PHP. I recommend downloading phpMyAdmin and using it to create and manage your databases, etc.
PHP Connection test
<?php
// hostname or ip of server (for local testing, localhost should work)
$dbServer='localhost';
// username and password to log onto db server
$dbUser='root';
$dbPass='';
// name of database
$dbName='test';
$link = mysql_connect("$dbServer", "$dbUser", "$dbPass") or die("Could not connect");
print "Connected successfully<br>";
mysql_select_db("$dbName") or die("Could not select database");
print "Database selected successfully<br>";
// close connection
mysql_close($link);
?>