<?php
/*
* This file is part of the PHP_Timer package.
*
* (c) Sebastian Bergmann <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* Utility class for timing.
*/
class PHP_Timer
{
/**
* @var array
*/
private static $times = array(
'hour' => 3600000,
'minute' => 60000,
'second' => 1000
);
/**
* @var array
*/
private static $startTimes = array();
/**
* @var float
*/
public static $requestTime;
/**
* Starts the timer.
*/
public static function start()
{
array_push(self::$startTimes, microtime(true));
}
/**
* Stops the timer and returns the elapsed time.
*
* @return float
*/
public static function stop()
{
return microtime(true) - array_pop(self::$startTimes);
}
/**
* Formats the elapsed time as a string.
*
* @param float $time
* @return string
*/
public static function secondsToTimeString($time)
{
$ms = round($time * 1000);
foreach (self::$times as $unit => $value) {
if ($ms >= $value) {
$time = floor($ms / $value * 100.0) / 100.0;
return $time . ' ' . ($time == 1 ? $unit : $unit . 's');
}
}
return $ms . ' ms';
}
/**
* Formats the elapsed time since the start of the request as a string.
*
* @return string
*/
public static function timeSinceStartOfRequest()
{
return self::secondsToTimeString(microtime(true) - self::$requestTime);
}
/**
* Returns the resources (time, memory) of the request as a string.
*
* @return string
*/
public static function resourceUsage()
{
return sprintf(
'Time: %s, Memory: %4.2fMB',
self::timeSinceStartOfRequest(),
memory_get_peak_usage(true) / 1048576
);
}
}
if (isset($_SERVER['REQUEST_TIME_FLOAT'])) {
PHP_Timer::$requestTime = $_SERVER['REQUEST_TIME_FLOAT'];
} elseif (isset($_SERVER['REQUEST_TIME'])) {
PHP_Timer::$requestTime = $_SERVER['REQUEST_TIME'];
} else {
PHP_Timer::$requestTime = microtime(true);
}
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