<?php
$hostname = "localhost";
$username = "mysqluser";
$password = "mysqlpass";
$database = "mysqldbname";

$strtedAt = microtime(true);

try {
    $conn = new PDO("mysql:host=$hostname;dbname=$database", $username, $password);
    // set the PDO error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "Connected successfully <br>";
}
catch(PDOException $e)
    {
    echo "Connection failed: " . $e->getMessage();
}

$endedAt 	= microtime(true);
$msc 	= $endedAt - $strtedAt;

echo "Time to mysql connect: " . $msc . ' s'; // in seconds