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Re: Verifying time in php [message #179391 is a reply to message #179385]

Sun, 14 October 2012 19:03

Michael Fesser
Messages: 215
Registered: September 2010

Karma:

Senior Member

.oO(Peter H. Coffin)

> On Sun, 14 Oct 2012 17:50:48 +0200, Michael Fesser wrote:
>> .oO(houghi)
>>
>>> I am aware of those. However I can not figure out how to do a check on
>>> all of them, without getting lost in if statements.
>>>
>>> See below where '-' means empty, 1 means any digit(s) and A means any no
>>> digit(s). I have not shown all options.
>>> [...]
>>
>> I wouldn't care too much about invalid inputs. Instead I would just take
>> what I get and see what I can do with it.
>>
>> So I would explicitly cast all values to int (invalid or empty values
>> will become 0), then just do a simple range check on all of the three
>> values and then do the math.
>
> Challenging curcumstance: "A" "B" "C" cast to int becomes 0:0:0, which
> is a valid time.

Yes, as expected and intended.

In my scripts I do a similar thing with date inputs. I don't like
separate fields for day, month and year. So I simply accept what I get
from a single field and try to parse it in several ways. If the result
is a valid date, I accept it. If not, it triggers an error message and
shows the form again.

And I would do the same here as described above. If all three values are
empty or invalid, the result will automatically be 0 and can easily be
rejected. And if values like 36h or 90m are accepted as well, even the
range check could be omitted: just cast to int, maybe abs(), and then
calculate the time in seconds, that's it. Why make things more difficult
than necessary?

Micha

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[Message index]

		Verifying time in php By: houghi on Sun, 14 October 2012 09:45
		Re: Verifying time in php By: Denis McMahon on Sun, 14 October 2012 10:25
		Re: Verifying time in php By: houghi on Sun, 14 October 2012 11:50
		Re: Verifying time in php By: Denis McMahon on Sun, 14 October 2012 21:12
		Re: Verifying time in php By: houghi on Sun, 14 October 2012 10:30
		Re: Verifying time in php By: J.O. Aho on Sun, 14 October 2012 13:03
		Re: Verifying time in php By: houghi on Sun, 14 October 2012 15:16
		Re: Verifying time in php By: Michael Fesser on Sun, 14 October 2012 15:50
		Re: Verifying time in php By: M. Strobel on Sun, 14 October 2012 16:22
		Re: Verifying time in php By: Peter H. Coffin on Sun, 14 October 2012 16:41
		Re: Verifying time in php By: Martin Leese on Sun, 14 October 2012 17:06
		Re: Verifying time in php By: houghi on Sun, 14 October 2012 17:41
		Re: Verifying time in php By: Michael Fesser on Sun, 14 October 2012 19:03
		Re: Verifying time in php By: houghi on Sun, 14 October 2012 20:39
		Re: Verifying time in php By: Christoph Becker on Sun, 14 October 2012 15:52
		Re: Verifying time in php By: houghi on Sun, 14 October 2012 17:20
		Re: Verifying time in php By: J.O. Aho on Sun, 14 October 2012 18:41
		Re: Verifying time in php By: Christoph Becker on Sun, 14 October 2012 18:49
		Re: Verifying time in php By: houghi on Sun, 14 October 2012 20:32
		Re: Verifying time in php By: Richard Damon on Sun, 14 October 2012 15:44
		Re: Verifying time in php By: Luuk on Sun, 14 October 2012 19:28

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