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<?php $start_time = new DateTime('09:00'); $close_time = new DateTime('21:00'); $periods = new DatePeriod($start_time, new DateInterval('PT30M'), $close_time); foreach ($periods as $period) { $times[] = $period->format('H:i'); } // DatePeriod excludes the end time $times[] = $close_time->format('H:i'); print_r($times);

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