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run code in 200+ php & hhvm versions
Bugs & Features
<?php function shift_datetimeobject($begin1, $end1, $begin2) { $dt_begin1 = new DateTime($begin1); $dt_end1 = new DateTime($end1); $span = $dt_begin1->diff($dt_end1); $dt_return = new DateTime($begin2); return array($dt_return->add($span), $span); } function shift_timestamp($begin1, $end1, $begin2) { $dt_begin1 = new DateTime($begin1); $st_begin1 = $dt_begin1->getTimestamp(); $dt_end1 = new DateTime($end1); $st_end1 = $dt_end1->getTimestamp(); $span = $st_end1 - $st_begin1; $dt_begin2 = new DateTime($begin2); $st_begin2 = $dt_begin2->getTimestamp(); $st_end2 = $st_begin2 + $span; $dt_end2 = new DateTime(); return $dt_end2->setTimestamp($st_end2); } $params = array( array('2012-05-07', '2012-06-01', '2012-05-21'), array('2012-06-11', '2012-07-13', '2012-06-18'), array('2012-06-25', '2012-07-27', '2012-07-02'), array('2012-07-09', '2012-07-27', '2012-07-16'), ); foreach ($params as $p) { $erg_object = shift_datetimeobject($p[0], $p[1], $p[2]); $erg_stamp = shift_timestamp($p[0], $p[1], $p[2]); printf("Params: %s, %s, %s\n", $p[0], $p[1], $p[2]); printf('$erg_stamp = %s' . "\n", $erg_stamp->format('Y-m-d')); printf('$erg_object[0] = %s' . "\n", $erg_object[0]->format('Y-m-d')); printf("span (object) = %s\n", $erg_object[1]->format('%a days %H:%I:%S')); if ($erg_object[0] == $erg_stamp) { echo "OK"; } else { echo "WRONG!"; } echo "\n\n"; }
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.1
Params: 2012-05-07, 2012-06-01, 2012-05-21 $erg_stamp = 2012-06-15 $erg_object[0] = 2012-06-15 span (object) = 25 days 00:00:00 OK Params: 2012-06-11, 2012-07-13, 2012-06-18 $erg_stamp = 2012-07-20 $erg_object[0] = 2012-07-20 span (object) = 32 days 00:00:00 OK Params: 2012-06-25, 2012-07-27, 2012-07-02 $erg_stamp = 2012-08-03 $erg_object[0] = 2012-08-04 span (object) = 32 days 00:00:00 WRONG! Params: 2012-07-09, 2012-07-27, 2012-07-16 $erg_stamp = 2012-08-03 $erg_object[0] = 2012-08-03 span (object) = 18 days 00:00:00 OK