[PHP] Dates Again

2008-03-31 Thread VamVan 
Hello All,

I have a date in 2008-03-29 12:15:00  format.

   - How can I reduce one day from it?
   - How can I reduce one hour from it?
   - How can I add 1 hour to today's date?

Thanks

Re: [PHP] Dates Again

2008-03-31 Thread Zoltán Németh 

VamVan írta:

Hello All,

I have a date in 2008-03-29 12:15:00  format.

   - How can I reduce one day from it?
   - How can I reduce one hour from it?
   - How can I add 1 hour to today's date?

Thanks



just convert it to a timestamp with strtotime()
then you can manipulate it by adding/substracting
- 86400 for a day
- 3600 for an hour
then convert back with strftime()

http://hu.php.net/strtotime
http://hu.php.net/strftime

greets,
Zoltán Németh

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Re: [PHP] Dates Again

2008-03-31 Thread Ray Hauge 

Zoltán Németh wrote:

VamVan írta:

Hello All,

I have a date in 2008-03-29 12:15:00  format.

   - How can I reduce one day from it?
   - How can I reduce one hour from it?
   - How can I add 1 hour to today's date?

Thanks



just convert it to a timestamp with strtotime()
then you can manipulate it by adding/substracting
- 86400 for a day
- 3600 for an hour
then convert back with strftime()

http://hu.php.net/strtotime
http://hu.php.net/strftime

greets,
Zoltán Németh



I believe you can also use strtoime() 
http://us.php.net/manual/en/function.strtotime.php


$time = strtotime($inputTime);
$time = strtotime('-1 day', $time);
$outputTime = strftime('%Y-%m%d', $time);

I'm not sure which is more efficient, but it helps when you're looking 
for next thursday or other things like that.


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Ray Hauge
www.primateapplications.com

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Re: [PHP] Dates Again

2008-03-31 Thread Larry Garfield 
On Monday 31 March 2008, Zoltán Németh wrote:
 VamVan írta:
  Hello All,
 
  I have a date in 2008-03-29 12:15:00  format.
 
 - How can I reduce one day from it?
 - How can I reduce one hour from it?
 - How can I add 1 hour to today's date?
 
  Thanks

 just convert it to a timestamp with strtotime()
 then you can manipulate it by adding/substracting
 - 86400 for a day
 - 3600 for an hour
 then convert back with strftime()

 http://hu.php.net/strtotime
 http://hu.php.net/strftime

 greets,
 Zoltán Németh

Do not use ints for date/time math.  There are WY too many wacky edge 
cases that can bite you in the butt.

http://www.php.net/manual/en/function.date-create.php

Use a DateTime object.  You can do all sorts of manipulations to it and it 
will handle all the timezone, daylight savings, leap year, and similar 
weirdness for you.  It also supports 64-bit dates internally so you can cover 
the entire span of human history and then some.

-- 
Larry Garfield  AIM: LOLG42
[EMAIL PROTECTED]   ICQ: 6817012

If nature has made any one thing less susceptible than all others of 
exclusive property, it is the action of the thinking power called an idea, 
which an individual may exclusively possess as long as he keeps it to 
himself; but the moment it is divulged, it forces itself into the possession 
of every one, and the receiver cannot dispossess himself of it.  -- Thomas 
Jefferson

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