How Tos > Connect to MySQL from PHP
The following example shows how to connect to a MySQL database using the mysqli() library:
<?php
DEFINE('DB_USERNAME', 'root');
DEFINE('DB_PASSWORD', 'root');
DEFINE('DB_HOST', 'localhost');
DEFINE('DB_DATABASE', 'performance_schema');
$mysqli = new mysqli(DB_HOST, DB_USERNAME, DB_PASSWORD, DB_DATABASE);
if (mysqli_connect_error()) {
die('Connect Error ('.mysqli_connect_errno().') '.mysqli_connect_error());
}
echo 'Connected successfully.';
$mysqli->close();
?>