Generate UNIX timestamps

JavaScript:

var timestamp = Math.floor(Date.now()/1000);
//var timestamp = Math.floor((new Date).getTime()/1000);

Java:

long timestamp = System.currentTimeMillis()/1000;

Python:

timestamp = int(time.time())

Ruby:

timestamp = Time.now.to_i

Erlang:

{Mega, Secs, _} = now(),
Timestamp = Mega * 1000000 + Secs,

PHP:

<?php
$timestamp = time();
?>

MySQL:

SELECT FROM_UNIXTIME(1423946047);