<?php

class Mydate{

    public function get_millisecond()

    {

        $time = explode(" ", microtime());

        $time = $time[1] . ($time[0] * 1000);

        $time2 = explode(".", $time);

        $time = $time2[0];

        return $time;

    }

    public function get_now()

    {

        return time();

    }

    public function unix_to_human($unixtime,$fmt='Y-m-d H:i:s')

    {

        return date($fmt,$unixtime);

    }

    public function human_to_unix($humantime)

    {

        return strtotime($humantime);

    }

}

$obj =new Mydate();

$c = $obj->unix_to_human(time());

echo $obj->human_to_unix($c);