PHP 半小时间隔时间段

1. 拆分

$start = '08:30';
$end = '20:00';
$arr = [];

for ($i = strtotime($start); $i <= strtotime($end); $i = $i + 60 * 30) {
    $arr[] = date("H:i", $i);
}

print_r($arr);

2. 组合

$result = [];
$num = count($arr);

foreach ($arr as $key => $val) {
    if ($key < $num) {
        $time_str = strtotime($val);
        $result[] = array(
            'start_time' => $val,
            'end_time' => date('H:i', $time_str + 60 * 30)

        );
    }
}
print_r($result);