(int) (System.currentTimeMillis() / 1000)

// c
time(NULL)
// c++
std::time(0)

(int)(DateTime.UtcNow - new DateTime(1970, 1, 1)).TotalSeconds
// 或者
(DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000

import time
time.time()

Math.round(new Date().getTime()/1000)

// 纯PHP
time()
// composer Carbon包获取时间戳
use Carbon\Carbon
Carbon::now()->timestamp

[[NSDate date] timeIntervalSince1970]

SELECT unix_timestamp(now())

SELECT strftime('%s', 'now')

SELECT extract(epoch FROM now())

SELECT DATEDIFF(s, '1970-01-01 00:00:00', GETUTCDATE())

Time.now.to_i
Time.now.to_f * 1000

(int) (new Date().getTime()/1000)
// 或者
(int) (System.currentTimeMillis()/1000​)

DateDiff("s", "01/01/1970 00:00:00", Now())

time.Now().Unix()
time.Now().UnixNano();

NSDate().timeIntervalSince1970

calendar:datetime_to_gregorian_seconds(calendar:universal_time())-719528*24*3600.

time

x <- as.POSIXct( Sys.time() )
as.integer(x)

extern crate chrono;
chrono::prelude::Local::now().timestamp()

date +%s