Date validation

[Cobra123]

Hi.

Ive used the code

<?php
$day = $_GET['day'];
$month = $_GET['month'];
$year = $_GET['year'];

$date = date("m-d-Y", mktime(0, 0, 0, $day, $month, $year));
?>

to collect the date that the user has typed in, but how can i make sure the user types in a correct date?

So the cant have a month as like number "22", or a day as "56th"?

Thanks, Cobra

[Redprince]

Well, you simple have to check this

if($day > 0 && $day < 32 && $month > 0 && $month < 13)
{
  date()
}

May the use of is_integer() is needed

[spikeZ]

Or give them three drop down select menus.
That way there is no confusion.

[Redprince]

But there are still some evil men outside trying to manipulate any data found. Better check the data given, even it is from a checkbox or so.

[spikeZ]

I agree!

[Gibb]

you could combine the eregi function (to make sure the input is only a number, and 1-2 digits long) then use if statements to make sure it's in range, but like they said above, just use drop down menus.

[Redprince]

I would not use any function that requires the regex-engine for that task. A simple strlen() and is_integer() should be much faster.

[Cobra123]

Cheers guys will get onto it now

[Cobra123]

Hmm.

I like spikeZ idea about the drop down menu's, but how could i limit them to only inserting correct dates?

Some months have less days than others.. How could i make sure that the drop down list doesnt show day 31 for Feb, etc?

Thanks for your help, Cobra

[Gibb]

Hmm.

I like spikeZ idea about the drop down menu's, but how could i limit them to only inserting correct dates?

Some months have less days than others.. How could i make sure that the drop down list doesnt show day 31 for Feb, etc?

Thanks for your help, Cobra

find smarter clients.

j/k actually you could go through alot of work and make it so the first selected value (the month) will populate the next drop down menu (through javascript) with the correct days. That data could be pulled out of a text file i suppose.

[spikeZ]

set up an array with the acual number of days the month should have and compare that with the incoming days/month combo.

[spikeZ]

find smarter clients.

LMAO, you know it's true!

[Cobra123]

lol @ the clients joke
ts not the clients i need to be worried about really, its the sorting that will be done to the dates to display them in the correct order.

Also, i have no idea how to make it so the month box affect the days box.

Cobra

[Gibb]

lol @ the clients joke
ts not the clients i need to be worried about really, its the sorting that will be done to the dates to display them in the correct order.

Also, i have no idea how to make it so the month box affect the days box.

Cobra

I dont either cause Javascript scares me. Your best bet might be to verify the date after it is submitted (like spikeZ stated). I just went to a site with date input ( www.hertz.com ) and if you put in Feb 31 and Nov 31 (both which are not valid) it'll say they're invalid on the next page.

[Jhorra]

Doesn't the checkdate() function do that?

[Gibb]

Doesn't the checkdate() function do that?

by jove you're correct. That's quite a handy function

<?php
var_dump(checkdate(12, 31, 2000));
var_dump(checkdate(2, 29, 2001));
?>

The above example will output:

bool(true)
bool(false)

[Cobra123]

so how would i use that?

I dont think ive seen the output bool() before :S
or the var_dump for that matter :P

[Gibb]

so how would i use that?

I dont think ive seen the output bool() before :S
or the var_dump for that matter :P

me neither, but i'm assuming var_dump displays the type of variable returned and it's value.

So i would assume if i typed
var_dump("the quick brown fox");
it would output
string(the quick brown fox)

You dont have to use var_dump you just need something like this:

if (checkdate($month, $day, $year)) {
    echo 'valid date';
} else {
    echo 'invalid date';
} 

[devil cat]

mktime() will not return an incorrect timestamp as long as it is within the range of 1970-2038 or so.