獲取時間，格式如：yyyyMMddHHmmssSSSZ。

function get_millisecond(){  

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

     $msec=round($usec*1000);  

     return $msec;

}

    $cn_time=date('YmdHis', time()).get_millisecond();

    $jhm=$cn_time."+0800";

    echo $jhm;

將yyyyMMddHHmmssSSSZ時間格式轉換為Y-m-d H:i:s等格式。

第一種

$dateStr="20151221100259308+0800";

$times=strstr($dateStr, '+', TRUE);

$a=substr($times,0,-3);

$tt=strtotime($a);

echo date("Y-m-d H:i:s",$tt);

//2015-12-21 10:02:59





**第二種：**

$dateStr="20151221100259308+0800";

$date=preg_replace('{^(\d{4})(\d{2})(\d{2})(\d{2})(\d{2})(\d{2})(.*?)$}u', '$1-$2-$3 $4:$5:$6'
 
, $dateStr);

echo $date;

//2015-12-21 10:02:59

注意: microtime（）函式；