php time and date convertion

time.date.convertion.php

<?php

/* from unix timestamp to date */
$time = time();
echo date("Y-m-d H:i:s", $time),"\n";

/* from date string to timestamp */
$date = '2011-01-01 00:00:00';
echo strtotime($date),"\n";

/* make unix timestamp from datestring - another way */
$date = '2011-01-01';
list($year, $month, $day) = explode("-", $date);
echo mktime(0, 0, 0, $month, $day, $year),"\n";

?>