Solved

Comparing two dates problem

Posted on 2007-04-09
9
256 Views
Last Modified: 2008-02-01
Hi guys,

I have a field DATETIME in the database. I'm comparing values in that field to current date presented in the same format. When the current date is larger than the one in the database the error is supposed to pop up saying that the date is in the past. Everything works fine unless the database value is 2008-01-10 24:00:00. Or 24:01:00 - 24:59:00. In this case, it still says that the current date is larger than the database one but it's not. What can be the problem?

Thanks.
0
Comment
Question by:RealSnaD
  • 4
  • 2
  • 2
  • +1
9 Comments
 
LVL 24

Expert Comment

by:glcummins
ID: 18876828
Can you show us the code you are using to make the comparison?
0
 
LVL 49

Expert Comment

by:Roonaan
ID: 18876963
You can create a unix timestamp and compare those.

-r-

0
 
LVL 7

Author Comment

by:RealSnaD
ID: 18877006
Code as follows:

      $day              = $_REQUEST["eventday"];
      $month        = $_REQUEST["eventmonth"];
      $year        = $_REQUEST["eventyear"];
      $hours        = $_REQUEST["eventhours"];
      $minutes        = $_REQUEST["eventminutes"];
      $ampm        = $_REQUEST["eventampm"];

        // Adjusting Entered Date
      if(strlen(trim($month)) == 1) {
            $month = "0".$month;
      }
      if(strlen(trim($day)) == 1) {
            $day = "0".$day;
      }
      if(strlen(trim($hours)) == 1) {
            $hours = "0".$hours;
      }
      if((trim($ampm) == "PM") && ($hours != 12)) {
            $hours += 12;
      } else if((trim($ampm) == "AM") && ($hours == 12)) {
            $hours += 12;
      }
      $eventDate    = $year."-".$month."-".$day." ".$hours.":".$minutes.":00";
      $currentDate  = strtotime(date("Y-m-d H:i:s", time()));
      //----------------------------

       if(strtotime($eventDate) <= $currentDate) {
            // Redirect to error page      
                   header("Location:/admin/?o=newevent&id=".$eventId."&r=e3");
       }
0
 
LVL 50

Assisted Solution

by:Steve Bink
Steve Bink earned 50 total points
ID: 18877028
You're going through a lot of trouble to reinvent a particular wheel.  Roonaan has already posted my strategy.  Change the db value to unix timestamp, build another unix timestamp from your post/get data, then compare.  Look here:

http://www.php.net/manual/en/function.mktime.php
http://www.php.net/manual/en/function.strtotime.php

0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 7

Author Comment

by:RealSnaD
ID: 18877089
What if I don't have the database at all? Yes, forget about the database. I get the date from user and I need to compare it to the current date. If the current date is larger I give an error saying the date you entered is in the past. My code works fine unless user enters 12:00 - 12:59 AM which is 24:00 - 24:59.
0
 
LVL 49

Accepted Solution

by:
Roonaan earned 450 total points
ID: 18877102
24:00 / 24:59 need just be converted to 0:00-0:59 on the next day.

You can get the current time using time() of mktime() or gmtime().
-r-
0
 
LVL 50

Expert Comment

by:Steve Bink
ID: 18877438
On the next day or the same day?  In any case, I still agree with Roonaan.  

If you haven't already, change your form to use <select> elements.  This would also allow for some simple javascript form validation...you can verify the date's validity before the user submits your form.
0
 
LVL 7

Author Comment

by:RealSnaD
ID: 18877680
I don't like JS solutions in this case since user can have JS turned off and then it will cause other errors to show up. I'll try Roonaan's solution a bit later and let you guys know. Thanks.
0
 
LVL 7

Author Comment

by:RealSnaD
ID: 18883129
All I had to do is to change this

else if((trim($ampm) == "AM") && ($hours == 12)) {
            $hours += 12;
}

to

else if((trim($ampm) == "AM") && ($hours == 12)) {
            $hours -= 12;
}

because it's supposed to be 00 not 24. Now it works fine and comparison is done correctly now. But thanks to u guys anyways.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Developers of all skill levels should learn to use current best practices when developing websites. However many developers, new and old, fall into the trap of using deprecated features because this is what so many tutorials and books tell them to u…
Part of the Global Positioning System A geocode (https://developers.google.com/maps/documentation/geocoding/) is the major subset of a GPS coordinate (http://en.wikipedia.org/wiki/Global_Positioning_System), the other parts being the altitude and t…
Learn how to match and substitute tagged data using PHP regular expressions. Demonstrated on Windows 7, but also applies to other operating systems. Demonstrated technique applies to PHP (all versions) and Firefox, but very similar techniques will w…
The viewer will learn how to dynamically set the form action using jQuery.

895 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now