手元の適当スクリプトで一番使うやつ
<?php
/**
* Usage:
*
* $ php t.php 1324393200
* => 2011-12-20 15:00:00
* $ php t.php 1324393200 'Asia/Tokyo'
* => 2011-12-21 00:00:00
* $ php t.php '2011-12-21 00:00:00'
* => 1324393200
* $ php t.php '2011-12-21 00:00:00' 'UTC'
* => 1324425600
*/
if ($argc < 1) {
exit(255);
}
if (preg_match('/^\d+$/', $argv[1])) {
$dt = new \DateTime('@' . $argv[1]);
if (isset($argv[2])) {
$dt->setTimeZone(new \DateTimeZone($argv[2]));
}
echo $dt->format('Y-m-d H:i:s'), PHP_EOL;
} else {
$dt = new \DateTime($argv[1], new \DateTimeZone(isset($argv[2]) ? $argv[2] : 'Asia/Tokyo'));
$dt->setTimeZone(new \DateTimeZone('GMT'));
echo $dt->format('U'), PHP_EOL;
}