<?php
class Timer {
    var $timer_created = null;
    var $start_time = null;
    var $stop_time = null;

    function __construct() {
        $this->timer_created = $this->microtime_float();    
    }

    function microtime_float() {
        list($utime, $time) = explode(" ", microtime());
        return ((float)$utime + (float)$time);
    }

    function start() {
        $this->start_time = $this->microtime_float();
    }

    function stop() {
        $this->stop_time = $this->microtime_float();
    }

    function total() {
        if ($this->start_time != null && $this->stop_time != null) {
            return $this->stop_time - $this->start_time;
        }
        return null;
    }

    function reset() {
        $start_time = null;
        $stop_time = null;
    }
}

$timer = new Timer();

for ($iterations = 10000; $iterations < 1000000; $iterations += 10000) {
    //print_r("Testing with {$iterations} iterations\n");
    print_r($iterations);
    
    /*$timer->start();
    for ($i = 0; $i < $iterations; $i++) {
        if (file_exists('testo')) {
            unlink('testo');
        }
    }
    $timer->stop();

    //print_r("Total time with file_exists():\t\t {$timer->total()} seconds\n");
    //print_r(",{$timer->total()}\n");
    $timer->reset();*/

    $timer->start();
    for ($i = 0; $i < $iterations; $i++) {
        @unlink('testo');
    }
    $timer->stop();

    //print_r("Total time with error_supression():\t {$timer->total()} seconds\n");
    print_r(",{$timer->total()}\n");
    $timer->reset();
}