Re: validate as hour

This regular Expression will force a number between 0-23

Raw Reg ex:
^1?[0-9]{1}$|^2[0-3]{1}$

I'm remembering for php some of these char in the regex provided need
to be escaped.
Formated for PHP:
/^1?[0-9]{1}$|^2[0-3]{1}$/

And here is a good on line real time tester for regular expressions:
http://www.regextester.com/

To break down the regular expression
^ - Start of line
1? - means the number '1' for 0 or 1 occurrences. This is used for the
first char of 10-19
[0-9]{1} - means digits 0,1,2,3,4,5,6,7,8,9 for {1} exactly one
character this covers 0-9 and the second char of 10-19
$ - End of line
| - or condition Match the previous set (0-19) or the following set
(20-23)
^ - Start of line
2 - the number 2 for the first char in 20-23
[0-3]{1} - means digits 0,1,2,3 for {1} exactly one character. This
covers the 0-3 or the second char when the first char is 2
$ - End of line

var $validate = array(
'hour' => array(
'required' => true,
'rule' => '/^1?[0-9]{1}$|^2[0-3]{1}$/',
'message' => 'Only numbers between 0-23'
)
);

On Nov 26, 11:41 am, "ge...@dinnerbooking.com"
<ge...@dinnerbooking.com> wrote:
> I have an field which is an hour:
>
> "hour" => array(
>         "required" => true,
>         "allowEmpty" => false,
>         "rule" => "/^\d{1,2}+/",
> ),
>
> but how do I also specify that the number MUST be between 0 and 23 ?

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