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<?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
Output for git.master, git.master_jit, rfc.property-hooks
3 days from Wednesday to Saturday 4 days from Monday to Friday 7 days from Thursday to Thursday 3 days from Friday to Monday 1 days from Saturday to Sunday 6 days from Sunday to Saturday 3 days from Sunday to Wednesday

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