DateMath

[eluser]Nabeel[/eluser]
Hey everyone!

My first post and contribution

I wrote my own little "toolkit" which has been working great for me (never looking at CI before, but the way I did modules, etc, URL rewriting is almost close to CI, instead of regular expressions, I map array elements to URL segments, but I digress), but learning CI now for work, and decided to port a few of the classes I wrote over to libraries, since I end up using them, and it's useful.

I haven't searched to see if it's available already, if it is, well, that's ok

This one does basic math on dates - you can pass it date/time (in the MySQL format, timestamp, plain text), and it can do:

Code:

$this->datemath->add_time($time1, $time2)
$this->datemath->get_weeks_between($start, $end)
$this->datemath->get_days_from_date($start)
$this->datemath->get_days_between($start, $end)
$this->datemath->get_months_since_date($start)
$this->datemath->get_months_in_range($start, $end)

It's useful in doing things like "You posted 2 weeks ago".
You can check it out here: http://api.phpvms.net/index.php/datetest
For example, "Start" enter January 31st, and "End" enter "Today".
I entered "Yesterday" and "Today":

There are 1 months in range: Mar 2009
There are 1 days in between those two dates
There are 0.14 weeks in between those two dates

add_time() will add two times together (ie, 1:50 + 1:50 = 3:40, not 3:00)

And you can download it from here:
http://nsslive.net/downloads/ci_datemath.zip

It includes the above "datetest" controller, which shows how to use it.

I guess I need to write an article in the wiki on use.
Let me know of any bugs; I've been using it on a few projects and seemed to have fixed most of the kinks.

I have a charting library as well, based on pChart, which falls back on GoogleCharts if GD isn't found, would anyone be interested in that?