Date validation issue

[ndsoumah]

Hi guys

I'm having a hard time trying to validate some dates.
I have a form that accept dates from users in this format (YYYY-mm-dd).
I've been looking at the available datetime functions and I'm still
clueless as to how they can help me achieve my goals.

what I need to do id check is:
1- convert the input string into date first. At this point I couldn't
find any srtTOdate type of functions. then I tried doing it the hard
way...by using "checkdate" function. I could split the string fine
(using "explode") but then I was stuck because I couldn't find any
function to convert a string into Integer!

2- I need to check if the date is valid
Could somebody please help me out?

Thanks

[Manuel Lemos]

Hello,

on 06/27/2005 01:04 AM nd******@gmail.com said the following:

I'm having a hard time trying to validate some dates.
I have a form that accept dates from users in this format (YYYY-mm-dd).
I've been looking at the available datetime functions and I'm still
clueless as to how they can help me achieve my goals.

what I need to do id check is:
1- convert the input string into date first. At this point I couldn't
find any srtTOdate type of functions. then I tried doing it the hard
way...by using "checkdate" function. I could split the string fine
(using "explode") but then I was stuck because I couldn't find any
function to convert a string into Integer!

2- I need to check if the date is valid

You may want to take a look at this popular forms generation and
validation class that comes with custom input plug-in that lets the user
enter a date that is validated either on the client side with Javascript
and the server side with the class PHP code.

Not only it can validate the date, but also impose optional requirements
to accept dates after a given start date or before a end date.

http://www.phpclasses.org/formsgeneration

Here is a screenshot of an example date form:

http://www.phpclasses.org/browse/file/8245.html
--

Regards,
Manuel Lemos

PHP Classes - Free ready to use OOP components written in PHP
http://www.phpclasses.org/

PHP Reviews - Reviews of PHP books and other products
http://www.phpclasses.org/reviews/

Metastorage - Data object relational mapping layer generator
http://www.meta-language.net/metastorage.html

[chotiwallah]

nd******@gmail.com wrote:

Hi guys

I'm having a hard time trying to validate some dates.
I have a form that accept dates from users in this format (YYYY-mm-dd).
I've been looking at the available datetime functions and I'm still
clueless as to how they can help me achieve my goals.

what I need to do id check is:
1- convert the input string into date first. At this point I couldn't
find any srtTOdate type of functions. then I tried doing it the hard
way...by using "checkdate" function. I could split the string fine
(using "explode") but then I was stuck because I couldn't find any
function to convert a string into Integer!

2- I need to check if the date is valid
Could somebody please help me out?

Thanks

using checkdate() sounds good to me. converting a string into an int
works like that:

$int = (int)$string;

micha

[Alvaro G Vicario]

*** nd******@gmail.com wrote/escribió (26 Jun 2005 21:04:47 -0700):

1- convert the input string into date first. At this point I couldn't
find any srtTOdate type of functions.
In the "Date and Time Functions" chapter of the PHP manual you have all
date and time functions, including strtotime()
then I tried doing it the hard way...by using "checkdate" function. I could split the string fine
(using "explode") but then I was stuck because I couldn't find any
function to convert a string into Integer!

2- I need to check if the date is valid

As you already mentioned, checkdate sounds like a good option.
You may also find useful this code for a previous additional client-side
validation:

/*
* Returns true if valid date, false otherwise
* Month range is [1,12]
*/
function is_date(day, month, year // v2005-03-14
var TheDate=new Date();
TheDate.setFullYear(year, month-1, day);

return (TheDate.getDate()==day) && (TheDate.getMonth()==month-1) &&
(TheDate.getFullYear()==year);
}
--
-- Álvaro G. Vicario - Burgos, Spain
-- http://bits.demogracia.com - Mi sitio sobre programación web
-- Don't e-mail me your questions, post them to the group
--

[ndsoumah]

Thanks for all the replys
It's a lot of help.

[NC]

nd******@gmail.com wrote:

I'm having a hard time trying to validate some dates.
I have a form that accept dates from users in this format
(YYYY-mm-dd). I've been looking at the available datetime
functions and I'm still clueless as to how they can help
me achieve my goals.

function is_valid_date($datestring) {
if (date('Y-m-d', strtotime($datestring)) == $datestring) {
return true;
} else {
return false;
}
}

Usage examples:

is_valid_date('2005-05-22'); // returns true
is_valid_date('2005-05-32'); // returns false

The function assumes leading zeros are mandatory. If they
are not, here's a revision that will fix it:

function is_valid_date($datestring) {
list($y, $m, $d) = explode('-', $datestring);
list($yy, $mm, $dd) = explode('-', date('Y-m-d',
strtotime($datestring)));
if (($y == $yy) and ($m == $mm) and ($d == $dd)) {
return true;
} else {
return false;
}
}
Cheers,
NC