Online PHP editor | output for GuNGV

<?php $base = new DateTime("2000-03-04 00:00:00 Europe/Berlin"); $date = new DateTime("2016-09-03 23:00:00 Europe/Berlin"); $interval = new DateInterval('P5Y6M0D'); $ret = $date; $diff = $base->diff($date); // var_dump($diff); $iterations = 0; $y = $base->format('Y'); $m = $base->format('m'); $d = $base->format('d'); $h = $base->format('G'); $i = $base->format('i'); $s = $base->format('s'); if ($interval->y || $interval->m) { $monthDiff = $diff->y * 12 + $diff->m; $monthInterval = $interval->y * 12 + $interval->m; $iterations = floor($monthDiff / $monthInterval); $y = $base->format('Y') + ($interval->y * $iterations); $m = $base->format('m') + ($interval->m * $iterations); echo "set y:{$y}, m:{$m}, iterations:{$iterations}\n"; } $modify = $diff->d - ($interval->d * $iterations); if ($modify > 0) { $y += $interval->y; $m += $interval->m; $iterations++; } $d += $interval->d * $iterations; echo "set y:{$y}, m:{$m}, d:{$d}, iterations:{$iterations}\n"; $modify = $diff->h - ($interval->h * $iterations); if ($modify > 0) { $y += $interval->y; $m += $interval->m; $d += $interval->d; $iterations++; } $h += $interval->h * $iterations; echo "set y:{$y}, m:{$m}, d:{$d}, h:{$h}, iterations:{$iterations}\n"; $ret->setDate($y, $m, $d); $ret->setTime($h, $i, $s); echo $ret->format("Y-m-d H:i:s") . "\n"; exit; if ($interval->y) { $y = $diff->y / $interval->y; if ($y) { $intervals = $y / $interval->y; $m = $interval->m * $intervals; $y -= floor($m / 12); $m -= floor($m / 12) * 12; $ret->setDate( $base->format('Y') + $y, $base->format('m') + $m, $base->format('d') ); /* $ret->setTime( $base->format('G') + ($interval->h * $intervals), $base->format('i') + ($interval->i * $intervals), $base->format('s') + ($interval->s * $intervals) ); */ } } var_dump($ret); exit;