Online PHP editor | output for 2E3kt

<?php $dates = "2017-01-08, 2017-01-09, 2017-01-10"; var_dump(check_continuous_dates($dates)); // true $dates = "2017-01-08, 2017-01-12, 2017-01-13"; var_dump(check_continuous_dates($dates)); // false function check_continuous_dates($date) { $date = explode(", ", $date); $previous = new DateTime($date[0]); unset($date[0]); foreach ($date as $v) { $current = new DateTime($v); $diff = $current->diff($previous); if ($diff->days == 1) { $previous = new DateTime($v); } else { return false; } } return true; }