PHP Process Timer

ProcessTimer.php

<?php
/**
 * Process Timer.
 * Create a system timer for determining the run-time of a specific process.
 *
 * Usage:
 * $timer = new \Tyme\ProcessTimer();
 * $timer->start();
 * // Long running process
 * $timer->stop();
 * echo $timer->get_time();
 *
 * @package Tyme
 */

namespace Tyme;

/**
 * ProcessTimer Object
 */
class ProcessTimer {

	/**
	 * Timestamp of start time
	 *
	 * @var int
	 */
	public $time_start = 0;

	/**
	 * Timestamp of end time
	 *
	 * @var int
	 */
	public $time_end = 0;

	/**
	 * Start timer
	 *
	 * @return float Start time
	 */
	public function start() {
		global $tyme_timer_start;

		$tyme_timer_start   = self::current_time();
		$this->time_start = $tyme_timer_start;

		return $this->time_start;
	}

	/**
	 * Stop timer
	 */
	public function stop() {
		global $tyme_timer_end;

		$tyme_timer_end   = self::current_time();
		$this->time_end = $tyme_timer_end;
	}

	/**
	 * Get the total runtime.
	 *
	 * @param boolean $format Format the runtime?
	 * @return float
	 */
	public function get_time( $format = true ) {

		$time_total = $this->time_end - $this->time_start;

		if ( $format && 0 < $time_total ) {
			if ( function_exists( 'number_format_i18n' ) ) {
				$time_total = number_format_i18n( $time_total, 3 );
			} else {
				$time_total = number_format( $time_total, 3 );
			}
		}

		return $time_total;
	}

	/**
	 * Get current time in microtime
	 *
	 * @return float
	 */
	public static function current_time() {
		return microtime( true );
	}
}