你如何在一个regex中匹配12小时的hh:mm ?

How could you match 12 hour time in a regex-- in other words match 12:30 but not 14:74? Thanks!

如何在regex中匹配12小时的时间——换句话说，匹配12:30而不是14:74?谢谢!

11 个解决方案

#1

This should work:

这应该工作:

([1-9]|1[012]):[0-5][0-9]

#2

This is an example of a problem where "hey I know, I'll use regular expressions!" is the wrong solution. You can use a regular expression to check that your input format is digit-digit-colon-digit-digit, then use programming logic to ensure that the values are within the range you expect. For example:

这是一个问题的例子，“嘿，我知道，我将使用正则表达式!”是错误的解决方案。可以使用正则表达式检查输入格式是否为digit-digit-colon-digit- digital，然后使用编程逻辑确保值在您期望的范围内。例如:

/(\d\d?):(\d\d)/

if ($1 >= 1 && $1 <= 12 && $2 < 60) {
    // result is valid 12-hour time
}

This is much easier to read and understand than some of the obfuscated regex examples you see in other answers here.

这比您在其他答案中看到的一些模糊的regex示例更容易阅读和理解。

#3

^(00|0[0-9]|1[012]):[0-5][0-9] ?((a|p)m|(A|P)M)$

^ - Match the beginning of the string.

^ -匹配字符串的开始。

(00|0[0-9]|1[012]) - any two-digit number up to 12. Require two digits.

(00|0[0-9]|1[012]) -可达12的任何两位数。需要两个数字。

: - Match a colon

-匹配冒号

[0-5][0-9] - Match any two-digit number from 00 to 59.

[0-5][0-9] -匹配任何从00到59的两位数。

? - Match a space zero or one times.

吗?-匹配空格0或1次。

((a|p)m|(A|P)M) - Match am or pm, case insensitive.

(a|p)m|(a|p)m) -匹配am或pm，不区分大小写。

$ - Match the end of the string.

$ -匹配字符串的末尾。

#4

Like this: ((?:1[0-2]|0\d)\:(?:[0-5]\d)) if you want leading 0 for the hour, ((?:1[0-2]|\d)\:(?:[0-5]\d)) if you don't and ((?:1[0-2]|0?\d)\:(?:[0-5]\d)) if you don't care.

像这样:((?):1(0 - 2)| 0 \ d)\:(?:(0 - 5)\ d))如果你想要领先0小时,((?:1(0 - 2)| \ d)\:(?:(0 - 5)\ d))如果你不,((?:1(0 - 2)| 0 ? \ d)\:(?:(0 - 5)\ d))如果你不在乎。

#5

why regex? you can do this will simple integer check

为什么正则表达式?你可以做这个简单的整数检查

$str = "12:74";
list($h , $m ) = explode(":",$str);
if ( ($h <=12 && $h >=0  ) && ($m <=59 && $m >=0) ) {
    print "Time Ok.";
}else{
    print "Time not ok";
}

#6

I believe the above fail in at least one way, particularly regarding strings such as "13:00" (Keith's matches "3:00" in that case).

我认为上面的方法至少有一种失败的地方，尤其是关于字符串，比如“13:00”(在这种情况下，基思的匹配是“3:00”)。

This one should handle that issue as well as the others brought up.

这个问题应该和其他提出的问题一样得到解决。

([01][0-2]|(?<!1)[0-9]):([0-5][0-9])

#7

(0?\d|1[0-2]):([0-5]\d)

That will match everything from 0:00 up to 12:59. That's 13 hours, by the way. If you don't want to match 0:00 - 0:59, try this instead:

这将匹配从0:00到12:59的一切。顺便说一下，那是13个小时。如果你不想匹配0:00 - 0:59，试试这个:

([1-9]|1[0-2]):([0-5]\d)

#8

You could use this one:

你可以用这个:

/((?:1[0-2])|(?:0?[0-9])):([0-5][0-9]) ?([ap]m)/

/1 => hour
/2 => minute
/3 => am/pm

#9

The following matches padded and non-padded hours in a 24hr clock (i.e. 00:00 - 23:59) between 00:00 and 12:59.

在00:00到12:59之间，在24小时(即00:00 - 23:59)的时间内(即00:00 - 23:59)，以下是填充和非填充的时间。

(?:(?<!\d)[0-9]|0[0-9]|1[0-2]):[0-5][0-9]

Matches:

匹配:

00:00
00:00
00:58
00:58
01:34
01:34
1:34
34
8:35
35
12:23
12:23
12:59
59

Nonmatches:

13:00
13:00
13:23
13:23
14:45
45
23:59
23:59

#10

^(?:(?:1?(?:[0-2]))|[1-9]):[0-5][0-9]

#11

Here is a 12 hour pattern with AM and PM validation.

这里有一个12小时的模式和AM和PM验证。

TIME12HOURSAMPM_PATTERN = "^(?:(?<!\\d)[0-9]|0[0-9]|1[0-2]):[0-5][0-9] ?((a|p)m|(A|P)M)$";

TIME12HOURSAMPM_PATTERN = " ^(?:(? < ! \ \ d)[0 - 9][0 - 9]| 0 | 1[0]):[0 - 9][0 - 5]?(p(|)m | | p m)美元”;

#1