<?php
// (A) CONNECT TO DATABASE
$dbhost = "localhost";
$dbname = "test";
$dbchar = "utf8";
$dbuser = "root";
$dbpass = "";
$dbset = "mysql:host=$dbhost;dbname=$dbname;charset=$dbchar";
$pdo = new PDO($dbset, $dbuser, $dbpass);

// (B) TEST SETTINGS
$sql = "SELECT * FROM `users`";
$params = null;
$runs = 30000;

// (C) TIME QUERY
$start = microtime(true);
$stmt = $pdo->prepare($sql);
for ($i=0; $i<$runs; $i++) { $stmt->execute($params); }
$end = microtime(true);

// (D) CLOSE & RESULTS
$taken = $end - $start;
$average = $taken / $runs;
echo "TOTAL - $taken seconds | AVERAGE - $average seconds";