PHP:以字符串形式返回两天之间的所有24小时格式小时

Question

如何用PHP打印两个日期之间的所有小时？预期：凌晨01:00凌晨02:00。。下午21:00

Answer 1

虽然最可靠的答案在大多数情况下都是正确的，但它并不能涵盖所有答案。

当时区、夏令时开始发挥作用时，事情就会变得一团糟。

考虑使用DateTime和DateInterval

$from = new DateTime("2018-01-10 10:00:00 UTC");
$to = new DateTime("2018-01-10 16:00:00 UTC");
$interval = new DateInterval("PT1H");
for ($now = clone $from; $now < $to; $now->add($interval)) {
echo $now->format("Y-m-d H:i:s e  -->  H:i A") . "n";
}

将很好地输出

2018-01-10 10:00:00 UTC  -->  10:00 AM
2018-01-10 11:00:00 UTC  -->  11:00 AM
2018-01-10 12:00:00 UTC  -->  12:00 PM
2018-01-10 13:00:00 UTC  -->  13:00 PM
2018-01-10 14:00:00 UTC  -->  14:00 PM
2018-01-10 15:00:00 UTC  -->  15:00 PM

但此代码也将涵盖时间变化

$from = new DateTime("2018-03-24 20:00:00 Europe/Warsaw");
$to = new DateTime("2018-03-25 06:00:00 Europe/Warsaw");
$interval = new DateInterval("PT1H");
for ($now = clone $from; $now < $to; $now->add($interval)) {
echo $now->format("Y-m-d H:i:s e  -->  H:i A") . "n";
}

2018-03-24 20:00:00 Europe/Warsaw  -->  20:00 PM
2018-03-24 21:00:00 Europe/Warsaw  -->  21:00 PM
2018-03-24 22:00:00 Europe/Warsaw  -->  22:00 PM
2018-03-24 23:00:00 Europe/Warsaw  -->  23:00 PM
2018-03-25 00:00:00 Europe/Warsaw  -->  00:00 AM
2018-03-25 01:00:00 Europe/Warsaw  -->  01:00 AM
2018-03-25 03:00:00 Europe/Warsaw  -->  03:00 AM
2018-03-25 04:00:00 Europe/Warsaw  -->  04:00 AM
2018-03-25 05:00:00 Europe/Warsaw  -->  05:00 AM

注意，由于我们切换到夏令时间(CET到CEST时区(，因此没有02:00 AM

Answer 2

尝试for循环，它将打印两个值之间的小时数

$a = '05:00';
$b = '10:00';
// convert the strings to unix timestamps
$a = strtotime($a);
$b = strtotime($b);
// loop over every hour (3600sec) between the two timestamps
for($i = 0; $i < $b - $a; $i += 3600) {
// add the current iteration and echo it
echo date('H:i', $a + $i).'<br>';
}
?>

输出：

05:00
06:00
07:00
08:00
09:00
10:00