/*

     * 获取时间差，毫秒级

     */  

    function get_subtraction()

    {

            $t1 = microtime(true);

            $t2 = microtime(true);

            return (($t2-$)*).'ms';

    }  

    /*

     * microsecond 微秒     millisecond 毫秒

     *返回时间戳的毫秒数部分

     */

    function get_millisecond()

    {

            list($usec, $sec) = explode(" ", microtime());

            $msec=round($usec*);

            return $msec;  

    }  

    /*

     *

     *返回字符串的毫秒数时间戳

     */

    function get_total_millisecond()

    {

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

            $time = $time [] . ($time [] * );

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

            $time = $time2 [];

            return $time;

    }  

    /*

     *

     *返回当前 Unix 时间戳和微秒数(用秒的小数表示)浮点数表示，常用来计算代码段执行时间

     */  

    function microtime_float()

    {

        list($usec, $sec) = explode(" ", microtime());

        return ((float)$usec + (float)$sec);

    }  

$millisecond = get_millisecond();

$millisecond = str_pad($millisecond,,'',STR_PAD_RIGHT);

echo date("YmdHis").$millisecond;