--- /dev/null
+<?php
+/*
+ * This file is part of the PHP_Timer package.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * 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);
+}