<?php
// http://a...content-available-to-author-only...d.ru
$time = strtotime('2012-02-26'); // Исходная дата $interval = 3 * 24 * 3600; // число секунд в 3 сутках
$time += $interval;
echo "Через 3 дня будет " .date('Y-m-d', $time) ."\n";
PD9waHAKCi8vIGh0dHA6Ly9hLi4uY29udGVudC1hdmFpbGFibGUtdG8tYXV0aG9yLW9ubHkuLi5kLnJ1CmVycm9yX3JlcG9ydGluZygtMSk7CgokdGltZSA9IHN0cnRvdGltZSgnMjAxMi0wMi0yNicpOyAvLyDQmNGB0YXQvtC00L3QsNGPINC00LDRgtCwCiRpbnRlcnZhbCA9IDMgKiAyNCAqIDM2MDA7IC8vINGH0LjRgdC70L4g0YHQtdC60YPQvdC0INCyIDMg0YHRg9GC0LrQsNGFCiR0aW1lICs9ICRpbnRlcnZhbDsKZWNobyAi0KfQtdGA0LXQtyAzINC00L3RjyDQsdGD0LTQtdGCICIgLmRhdGUoJ1ktbS1kJywgJHRpbWUpIC4iXG4iOwo=