Online PHP editor | output for 9P2kJ

<?php date_default_timezone_set("Europe/Brussels"); $test1 = 1537430301; //20-09-2018 10:00 $test2 = 1537438500; //20-09-2018 12:15 $time1 = strtotime("next Monday", $test1); // expected 24-09-2018 10:00 $time2 = strtotime("next Monday", $test2); // expected 24-09-2018 12:15 $datetime1 = DateTime::createFromFormat('U', (string)$time1); $datetime1->setTimezone(new DateTimeZone("Europe/Brussels")); echo $datetime1->format('Y-m-d H:i:s') . "\n"; $datetime2 = DateTime::createFromFormat('U', (string)$time2); $datetime2->setTimezone(new DateTimeZone("Europe/Brussels")); echo $datetime2->format('Y-m-d H:i:s') . "\n";