Online PHP editor | output for gdekl

<?php function daysUntil($start, $end) { $lookup = ['Sunday' => 0, 'Monday' => 1, 'Tuesday' => 2, 'Wednesday' => 3, 'Thursday' => 4, 'Friday' => 5, 'Saturday' => 6]; $days = $lookup[$end] - $lookup[$start] + ($lookup[$end] <= $lookup[$start] ? 7 : 0); return "{$days} days from {$start} to {$end}\n"; } echo daysUntil('Wednesday', 'Saturday'); // Thursday, Friday, Saturday echo daysUntil('Monday', 'Friday'); // Tuesday, Wednesday, Thursday, Friday echo daysUntil('Thursday', 'Thursday'); // [assumed next week] echo daysUntil('Friday', 'Monday'); // Saturday, Sunday, Monday echo daysUntil('Saturday', 'Sunday'); // Sunday echo daysUntil('Sunday', 'Saturday'); // Monday, Tuesday, Wednesday, Thursday, Friday, Saturday echo daysUntil('Sunday', 'Wednesday'); // Monday, Tuesday, Wednesday