A nice day out

[Paul Lautman]

I was trying to use the following formula to add a number of weeks to a
date, where $b is the number of weeks.
date('Y-m-d', strtotime($Expiry_Date)+$b*86400*7)
However sometimes it added one day less than it should have done.
$Expiry_Date was always a Saturday and sometimes the answer was a Saturday
and sometimes the previous Friday.

Has anyone any idea why?

TIA
Regards
Paul

[Andy Jeffries]

On Wed, 03 May 2006 11:32:58 +0100, Paul Lautman wrote:

I was trying to use the following formula to add a number of weeks to a
date, where $b is the number of weeks. date('Y-m-d',
strtotime($Expiry_Date)+$b*86400*7) However sometimes it added one day
less than it should have done. $Expiry_Date was always a Saturday and
sometimes the answer was a Saturday and sometimes the previous Friday.

Has anyone any idea why?

No idea, but why not use two strtotime calls:

strtotime("+$b weeks", strtotime($Expiry_Date));

That would be a better native way of handling it (and more readable)

Cheers,
Andy
--
Andy Jeffries MBCS CITP ZCE | gPHPEdit Lead Developer
http://www.gphpedit.org | PHP editor for Gnome 2
http://www.andyjeffries.co.uk | Personal site and photos

[Paul Lautman]

Andy Jeffries wrote:

On Wed, 03 May 2006 11:32:58 +0100, Paul Lautman wrote:

I was trying to use the following formula to add a number of weeks
to a date, where $b is the number of weeks. date('Y-m-d',
strtotime($Expiry_Date)+$b*86400*7) However sometimes it added one
day less than it should have done. $Expiry_Date was always a
Saturday and sometimes the answer was a Saturday and sometimes the
previous Friday.

Has anyone any idea why?

No idea, but why not use two strtotime calls:

strtotime("+$b weeks", strtotime($Expiry_Date));

That would be a better native way of handling it (and more readable)

Cheers,
Andy

Nice one. I didn't think of that. Still like to know why the other one was
so wierd.

[Andy Jeffries]

On Wed, 03 May 2006 13:05:25 +0100, Paul Lautman wrote:

I was trying to use the following formula to add a number of weeks to a
date, where $b is the number of weeks. date('Y-m-d',
strtotime($Expiry_Date)+$b*86400*7) However sometimes it added one day
less than it should have done. $Expiry_Date was always a Saturday and
sometimes the answer was a Saturday and sometimes the previous Friday.

Has anyone any idea why?

No idea, but why not use two strtotime calls:

strtotime("+$b weeks", strtotime($Expiry_Date));

That would be a better native way of handling it (and more readable)

Nice one. I didn't think of that. Still like to know why the other one was
so wierd.

No idea.... I tend not to get hung up on problems when I've found a
solution though, life's too short ;-)

Cheers,
Andy
--
Andy Jeffries MBCS CITP ZCE | gPHPEdit Lead Developer
http://www.gphpedit.org | PHP editor for Gnome 2
http://www.andyjeffries.co.uk | Personal site and photos

[erik.f.boberg]

It is probably due to one day every year being 25 hours in php. its a
day in october i think and the reason is related to daylight savings
time i think. I had the same problem while making a calendar for my
homepage a while ago.

Andy Jeffries skrev:

On Wed, 03 May 2006 13:05:25 +0100, Paul Lautman wrote:

I was trying to use the following formula to add a number of weeks to a
date, where $b is the number of weeks. date('Y-m-d',
strtotime($Expiry_Date)+$b*86400*7) However sometimes it added one day
less than it should have done. $Expiry_Date was always a Saturday and
sometimes the answer was a Saturday and sometimes the previous Friday.

Has anyone any idea why?

No idea, but why not use two strtotime calls:

strtotime("+$b weeks", strtotime($Expiry_Date));

That would be a better native way of handling it (and more readable)

Nice one. I didn't think of that. Still like to know why the other one was
so wierd.

No idea.... I tend not to get hung up on problems when I've found a
solution though, life's too short ;-)

Cheers,
Andy
--
Andy Jeffries MBCS CITP ZCE | gPHPEdit Lead Developer
http://www.gphpedit.org | PHP editor for Gnome 2
http://www.andyjeffries.co.uk | Personal site and photos

[Paul Lautman]

Sounds likely. Is this documented anywhere?

er***********@gmail.com wrote:

It is probably due to one day every year being 25 hours in php. its a
day in october i think and the reason is related to daylight savings
time i think. I had the same problem while making a calendar for my
homepage a while ago.

Andy Jeffries skrev:

On Wed, 03 May 2006 13:05:25 +0100, Paul Lautman wrote:

> I was trying to use the following formula to add a number of
> weeks to a date, where $b is the number of weeks. date('Y-m-d',
> strtotime($Expiry_Date)+$b*86400*7) However sometimes it added
> one day less than it should have done. $Expiry_Date was always a
> Saturday and sometimes the answer was a Saturday and sometimes
> the previous Friday.
>
> Has anyone any idea why?

No idea, but why not use two strtotime calls:

strtotime("+$b weeks", strtotime($Expiry_Date));

That would be a better native way of handling it (and more
readable)

Nice one. I didn't think of that. Still like to know why the other
one was so wierd.

No idea.... I tend not to get hung up on problems when I've found a
solution though, life's too short ;-)

Cheers,
Andy
--
Andy Jeffries MBCS CITP ZCE | gPHPEdit Lead Developer
http://www.gphpedit.org | PHP editor for Gnome 2
http://www.andyjeffries.co.uk | Personal site and photos

[Jerry Stuckle]

Paul Lautman wrote:

Sounds likely. Is this documented anywhere?

er***********@gmail.com wrote:

It is probably due to one day every year being 25 hours in php. its a
day in october i think and the reason is related to daylight savings
time i think. I had the same problem while making a calendar for my
homepage a while ago.

Andy Jeffries skrev:

On Wed, 03 May 2006 13:05:25 +0100, Paul Lautman wrote:

>>I was trying to use the following formula to add a number of
>>weeks to a date, where $b is the number of weeks. date('Y-m-d',
>>strtotime($Expiry_Date)+$b*86400*7) However sometimes it added
>>one day less than it should have done. $Expiry_Date was always a
>>Saturday and sometimes the answer was a Saturday and sometimes
>>the previous Friday.
>>
>>Has anyone any idea why?
>
>No idea, but why not use two strtotime calls:
>
>strtotime("+$b weeks", strtotime($Expiry_Date));
>
>That would be a better native way of handling it (and more
>readable)

Nice one. I didn't think of that. Still like to know why the other
one was so wierd.

No idea.... I tend not to get hung up on problems when I've found a
solution though, life's too short ;-)

Cheers,
Andy
--
Andy Jeffries MBCS CITP ZCE | gPHPEdit Lead Developer
http://www.gphpedit.org | PHP editor for Gnome 2
http://www.andyjeffries.co.uk | Personal site and photos

Yep, it's called Daylight Savings Time in the United States. Last Sunday in
October at 2AM clocks are set back to 1AM.

--
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JDS Computer Training Corp.
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