PHP时间戳和日期格式相互转换

strtotime(date("Y-m-d H:i"))
date("Y-m-d H:i",$unixtime)

$todaytime=strtotime("today")

date("Y-m-d H:i",$todaytime)

date("Y-m-d H:i:s",time())
date("Y-m-d",time())

class SaonekController extends Controller {
 public function indexAction() {
  /*
  时间戳转换成日期不用说了
  但是日期要转成时间戳的话就要用到
  strtotime()
  */
  $time = time(); //时间戳
  $nowtime = date('Y-m-d H:i:s', $time); //生成带格式的日期
  $oldtime = '2010-11-10 22:19:21';
  $catime = strtotime($oldtime); //日期转换为时间戳
  $nowtimes = date('Y-m-d H:i:s', $catime); //时间戳又转回日期了
  echo $nowtimes;
 }
}

/*
时间转换函数
*/
function transTime($ustime) {
 $ytime = date("Y-m-d H:i", $ustime);
 $rtime = date("n月j日 H:i", $ustime);
 $htime = date("H:i", $ustime);
 $time = time() - $ustime;
 $todaytime = strtotime("today");
 $time1 = time() - $todaytime;
 if ($time < 60) {
  $str = &#39;刚刚&#39;;
 } else
  if ($time < 60 * 60) {
   $min = floor($time / 60);
   $str = $min . &#39;分钟前&#39;;
  } else
   if ($time < $time1) {
    $str = &#39;今天&#39; . $htime;
   } else {
    $str = $rtime;
   }
 return $str;
}

strtotime("+1 day")

echo date("Y-m-d H:i:s",strtotime("+1 day"))

strtotime("-1 day")

echo date("Y-m-d H:i:s",strtotime("-1 day"))

strtotime("+1 week")

echo date("Y-m-d H:i:s",strtotime("+1 week"))

strtotime("-1 week")

echo date("Y-m-d H:i:s",strtotime("-1 week"))

strtotime("next Thursday")

echo date("Y-m-d H:i:s",strtotime("next Thursday"))

strtotime("last Thursday")

echo date("Y-m-d H:i:s",strtotime("last Thursday"))

date_default_timezone_set('PRC'); //设置中国时区