Re: [PHP] correct date (cont.)

[Richard Lynch]

> This should get me exactly 3 months later and also checks for if its a
later

No, it won't on leap years, or during daylight savings time changes, etc.

Don't try to do the year/month calculation yourself.

Let PHP do it for you, and it will be correct.  Every time.

$threemonths = mktim(0, 0, 0, date("m") + 3);

ACTUALLY, it would be even EASIER to use SQL to do this.  Presumably MySQL
will let you use things not unlike...

where registation_date + '3 months' <= now()

You're probably better off storing a registration_date and an interval than
the deadline.  Then, if you decide to extend everybody's 3 month freebie to
4 months, it's easy.

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Re: [PHP] correct date (cont.)

[Renze Munnik]

On Thu, Aug 09, 2001 at 01:08:33PM -0400, [EMAIL PROTECTED] wrote:
> Oops..(Hit send prematurely.)
> 
>   $currentmonth = date("m");
>   $currentday = date("d");
>   $year = date("Y");
>   $newmonth = $currentmonth + 3;
>   if ($newmonth > 12){
> $newmonth = $newmonth % 12;
> $year = $currentyear + 1;
>   }
>   $3months = date("Y-m-d",mktime(0,0,0,$newmonth,$currentday,$year));
> 
> This should get me exactly 3 months later and also checks for if its a later 
> month (oct, nov, or dec) then it goes to the next year.  How could I check to 
> see if the new date doesn't fall on Feb. 30th or whatever?  If someone signs 
> up on the 31st of a month it'll never end on a month with 31 days.
> 
> Thanks,
> Pat
> 

Nothing to worry about... PHP does it for you. You can try it you
know... Just use:

$currentmonth = 2;  /* feb */
$currentday = 31;
$year = 2001;  /* eg */

The output will then be:

2001-03-03

Ain't that most excellent?!?!

I should tell you though... that:

$3months = date("Y-m-d",mktime(0,0,0,$newmonth,$currentday,$year));

doesn't work. Obv. you haven't tried it. It produces an error (and
no date). Your variable name cannot begin with a number.

= PHP Manual =
A valid variable name starts with a letter or underscore, followed by
any number of letters, numbers, or underscores. As a regular expression,
it would be expressed thus:
'[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*'
= =

So I'd say: $threeMonths.

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