<?php
    $servername="localhost";
    $username="root";
    $password="whatever";
    $conn = new mysqli($servername, $username, $password);
    if (!$conn) {
        die("Failed : " . mysqli.connect_error());
    }
    echo "Connection Successful!";
?>

Warning: A link to the server could not be established.
url=jdbc:mysql://localhost/?
jdbcCompliantTruncation=false&characterSetResults=ISO885_1&characterEncoding=ISO8859_1&userServerPrepStmts=true
driver=com.mysql.jdbc.Driver com.caucho.quercus.QuercusModuleException:java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
Connection Successful!