[PHP] Benchmarking

<?php
    /*
        * @class benchmarking tools
        * @author Jordan Doyle
        * @description use this for simple benchmarking!
    */
    namespace benchmark;
    class tools
    {
        /*
            * @function **none**
            * @description defines vars
        */
            public $_start,
                   $_end;
                   $_benchmark;


        /*
            * @function start
            * @description starts the timer. (microtime(true))
        */
        public function start()
        {
            $this->_start = microtime(true);
            return true;
        }
        /*
            * @function stop
            * @description stops the timer. (microtime(true)).
        */
        public function stop()
        {
            $this->_end = microtime(true);
            return $this;
        }
        /*
            * @function end
            * @description finishes everything by subtracting the 2 floats and working out the decimals.
        */
        public function end($decimals)
        {
            $this->_benchmark = numberformat( ($this->_start - $this->_end), $decimals );
            return $this->_benchmark;
        }
        /*
            * @function flush
            * @description nulls all the vars.
        */
        public function flush()
        {
            $this->_benchmark = NULL;
            $this->_start     = NULL;
            $this->_end       = NULL;
            return $this;
        }
    }

    // make an instance of the class, using your singleton (\benchmark\tools) name the var 'b'
    // now you need to start the benchmark, $b->start();
    // now when you need to stop it use $b->stop();
    // to output it... echo $b->end(5);
    // -----OR WITH THE NEW UPDATE YOU CAN NOW DO $b->stop()->end(5); The integer in end is how many decimals...