Weblabor

<?php
	class ClockUtil {
		var $_clocks = array();


		function Start($handler, $reset = false)
		{
			if (!isset($this->_clocks[$handler]) || $reset) {
				$this->_clocks[$handler] = $this->_GetTime();
				return true;
			} else {
				trigger_error('The clock named '.$handler.' was already started!', E_USER_WARNING);
				return false;
			}
		}


		function Stop($handler)
		{
			if (isset($this->_clocks[$handler])) {
				$elapsedTime = $this->_GetTime() - $this->_clocks[$handler];
				unset($this->_clocks[$handler]);

				return $elapsedTime;
			} else {
				trigger_error('The clock named '.$handler.' was not started!', E_USER_WARNING);
				return false;
			}
		}


		function Read($handler)
		{
			if (isset($this->_clocks[$handler])) {
				return $this->_GetTime() - $this->_clocks[$handler];
			} else {
				trigger_error('The clock named '.$handler.' was not started!', E_USER_WARNING);
				return false;
			}
		}


		function _GetTime()
		{
			list($usec, $sec) = explode(' ', microtime());
			return (float)$usec + (float)$sec;
		}
	}
?>