Re: [PHP] Function mktime() documentation question
On Mon, 2012-03-12 at 15:53 -0400, Tedd Sperling wrote: > On Mar 11, 2012, at 3:10 PM, Matijn Woudt wrote: > > On Sun, Mar 11, 2012 at 7:33 PM, Tedd Sperling > > wrote: > >> Actually, this works for me: > >> > >> $days_in_month = date('t', mktime(0, 0, 0, $next_month, 0, $year)); > >> > >> But again, I don't see why I have to use "next month" to find the number > >> of days in this month. > > > > That's because you're requesting day 0 of some month, which refers to > > the last day in the previous month. > > Try: $days_in_month = date('t', mktime(0, 0, 0, $next_month, 1, $year)); > > > > - Matijn > > I got that. > > Beating the same dead horse again, I think day 0 of this month should contain > the days in this month, but I am in the minority on this. > > Cheers, > > tedd > > _ > tedd.sperl...@gmail.com > http://sperling.com > I think a lot of the confusion is that we're so used to array indexes beginning at 0 that we tend to assume other things should start there too. I found this confusing when I first came across the date stuff in PHP. Now I'm used to it, it makes sense. -- Thanks, Ash http://www.ashleysheridan.co.uk
Re: [PHP] Function mktime() documentation question
On Mar 11, 2012, at 3:10 PM, Matijn Woudt wrote: > On Sun, Mar 11, 2012 at 7:33 PM, Tedd Sperling > wrote: >> Actually, this works for me: >> >> $days_in_month = date('t', mktime(0, 0, 0, $next_month, 0, $year)); >> >> But again, I don't see why I have to use "next month" to find the number of >> days in this month. > > That's because you're requesting day 0 of some month, which refers to > the last day in the previous month. > Try: $days_in_month = date('t', mktime(0, 0, 0, $next_month, 1, $year)); > > - Matijn I got that. Beating the same dead horse again, I think day 0 of this month should contain the days in this month, but I am in the minority on this. Cheers, tedd _ tedd.sperl...@gmail.com http://sperling.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Sun, Mar 11, 2012 at 7:33 PM, Tedd Sperling wrote: > On Mar 11, 2012, at 6:12 AM, Ashley Sheridan wrote: >> >> I still don't see what's wrong with >> >> date("t"); >> >> -- >> Thanks, >> Ash > > Ash: > > It's just too damn simple -- we need to make things complicated. :-) > > Actually, this works for me: > > $days_in_month = date('t', mktime(0, 0, 0, $next_month, 0, $year)); > > But again, I don't see why I have to use "next month" to find the number of > days in this month. That's because you're requesting day 0 of some month, which refers to the last day in the previous month. Try: $days_in_month = date('t', mktime(0, 0, 0, $next_month, 1, $year)); - Matijn -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Mar 11, 2012, at 6:12 AM, Ashley Sheridan wrote: > > I still don't see what's wrong with > > date("t"); > > -- > Thanks, > Ash Ash: It's just too damn simple -- we need to make things complicated. :-) Actually, this works for me: $days_in_month = date('t', mktime(0, 0, 0, $next_month, 0, $year)); But again, I don't see why I have to use "next month" to find the number of days in this month. O', the mysteries of life. Cheers, tedd _ tedd.sperl...@gmail.com http://sperling.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Sat, 2012-03-10 at 20:38 -0500, Tedd Sperling wrote: > On Mar 10, 2012, at 12:20 PM, Maciek Sokolewicz wrote: > > > function getAmountOfDaysInAMonth($month, $year) { > > $days = array(31, (($year%4==0 and ($year%100 > 0 or $year%400==0)) ? 29 > > : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); > > return $days[$month+1]; > > } > > I like that -- here's a small variation. > > function numberDaysMonth($month, $year) > { > // Leap year is definded as a year that is evenly divisible by four > // AND (year NOT evenly divisible by 100 OR year IS evenly divisible by > 400) > > $feb = ($year%4 == 0 && ($year%100 != 0 || $year%400 == 0) ) ? 29 : 28; > $days = array(0, 31, $feb, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); > return $days[$month]; > } > > Cheers, > > tedd > > _ > tedd.sperl...@gmail.com > http://sperling.com > > > > > > I still don't see what's wrong with date("t"); -- Thanks, Ash http://www.ashleysheridan.co.uk
Re: [PHP] Function mktime() documentation question
On Mar 10, 2012, at 12:20 PM, Maciek Sokolewicz wrote: > function getAmountOfDaysInAMonth($month, $year) { > $days = array(31, (($year%4==0 and ($year%100 > 0 or $year%400==0)) ? 29 : > 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); > return $days[$month+1]; > } I like that -- here's a small variation. function numberDaysMonth($month, $year) { // Leap year is definded as a year that is evenly divisible by four // AND (year NOT evenly divisible by 100 OR year IS evenly divisible by 400) $feb = ($year%4 == 0 && ($year%100 != 0 || $year%400 == 0) ) ? 29 : 28; $days = array(0, 31, $feb, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); return $days[$month]; } Cheers, tedd _ tedd.sperl...@gmail.com http://sperling.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Sat, Mar 10, 2012 at 9:47 PM, tamouse mailing lists wrote: > I'm just a bit baffled why this isn't a standard library function. Good question, but I think the problem here is that there are tons of these small functions, and you got to make a choice on what to implement and what not. I can think of at least 20 other functions I'd like to have integrated, but IMO PHP shouldn't be bloated with tons of just 'useful' functions. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
I'm just a bit baffled why this isn't a standard library function. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On 10 March 2012 19:06, Matijn Woudt wrote: > On Sat, Mar 10, 2012 at 6:20 PM, Maciek Sokolewicz > wrote: > > On 09-03-2012 14:11, Daniel Brown wrote: > >> > >> (To the list, as well. First day with my new fingers, > apparently) > >> > >> On Fri, Mar 9, 2012 at 08:09, Daniel Brown wrote: > >>> > >>> On Thu, Mar 8, 2012 at 21:23, Tedd Sperling > >>> wrote: > >>> > >>>This starts getting a bit off-topic from your original email, but > >>> knowing that you're trying to use it for teaching your classes at the > >>> college, it may be of some value to you. > >>> > > All of this aside, though, you may instead want to use something > along > > the lines of date('d',strtotime('last day of this month')); in > tandem with > > your date formatting. > > > That's a good idea, but > > > date('d',strtotime('last day of this month')); > > > gives me the number of days in *this* month, but not the next, or > previous, month. > > I need the result to be whatever date was selected -- something like: > > $number_days = date('d',strtotime('last day of April, 2014')); > > But that doesn't work. > >>> > >>> > >>>Sure it does, though you may have some issues when using > >>> punctuation, unnecessary words, or using capital letters for anything > >>> other than proper names. What version of PHP are you using? I get > >>> the correct answers for all of the following phrases: > >>> > >>>"last day of April 2014" > >>>"last day of this month" > >>>"last day of next month" > >>>"last day of last month" > >>>"third Saturday March 2012" > >>> > >>>Or you can even be excruciatingly redundant: > >>> > >>>echo date('d',strtotime('last day of this > >>> month',strtotime('next month'))); > >>>echo date('d',strtotime('last day of this > >>> month',strtotime('February 2018'))); > >>>echo date('d',strtotime('second Monday',strtotime('September > >>> 2012'))); > >>> > >> > >> > >> > > > > I must admit I'm still at a loss why people would want a function to tell > > them the amount of days in a month. That amount is pretty much fixed > (except > > for february, but that's also mathematically easy to fix). So a simple > > function like: > > function getAmountOfDaysInAMonth($month, $year) { > > $days = array(31, (($year%4==0 and ($year%100 > 0 or $year%400==0)) ? > 29 : > > 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); > > return $days[$month+1]; > > } > > Shouldn't this be $month-1? > > - Matijn > Ehr, sorry, yes, you're right; well spotted! :) - Tul
Re: [PHP] Function mktime() documentation question
On Sat, Mar 10, 2012 at 6:20 PM, Maciek Sokolewicz wrote: > On 09-03-2012 14:11, Daniel Brown wrote: >> >> (To the list, as well. First day with my new fingers, apparently) >> >> On Fri, Mar 9, 2012 at 08:09, Daniel Brown wrote: >>> >>> On Thu, Mar 8, 2012 at 21:23, Tedd Sperling >>> wrote: >>> >>> This starts getting a bit off-topic from your original email, but >>> knowing that you're trying to use it for teaching your classes at the >>> college, it may be of some value to you. >>> > All of this aside, though, you may instead want to use something along > the lines of date('d',strtotime('last day of this month')); in tandem with > your date formatting. That's a good idea, but > date('d',strtotime('last day of this month')); gives me the number of days in *this* month, but not the next, or previous, month. I need the result to be whatever date was selected -- something like: $number_days = date('d',strtotime('last day of April, 2014')); But that doesn't work. >>> >>> >>> Sure it does, though you may have some issues when using >>> punctuation, unnecessary words, or using capital letters for anything >>> other than proper names. What version of PHP are you using? I get >>> the correct answers for all of the following phrases: >>> >>> "last day of April 2014" >>> "last day of this month" >>> "last day of next month" >>> "last day of last month" >>> "third Saturday March 2012" >>> >>> Or you can even be excruciatingly redundant: >>> >>> echo date('d',strtotime('last day of this >>> month',strtotime('next month'))); >>> echo date('d',strtotime('last day of this >>> month',strtotime('February 2018'))); >>> echo date('d',strtotime('second Monday',strtotime('September >>> 2012'))); >>> >> >> >> > > I must admit I'm still at a loss why people would want a function to tell > them the amount of days in a month. That amount is pretty much fixed (except > for february, but that's also mathematically easy to fix). So a simple > function like: > function getAmountOfDaysInAMonth($month, $year) { > $days = array(31, (($year%4==0 and ($year%100 > 0 or $year%400==0)) ? 29 : > 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); > return $days[$month+1]; > } Shouldn't this be $month-1? - Matijn -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On 09-03-2012 14:11, Daniel Brown wrote: (To the list, as well. First day with my new fingers, apparently) On Fri, Mar 9, 2012 at 08:09, Daniel Brown wrote: On Thu, Mar 8, 2012 at 21:23, Tedd Sperling wrote: This starts getting a bit off-topic from your original email, but knowing that you're trying to use it for teaching your classes at the college, it may be of some value to you. All of this aside, though, you may instead want to use something along the lines of date('d',strtotime('last day of this month')); in tandem with your date formatting. That's a good idea, but date('d',strtotime('last day of this month')); gives me the number of days in *this* month, but not the next, or previous, month. I need the result to be whatever date was selected -- something like: $number_days = date('d',strtotime('last day of April, 2014')); But that doesn't work. Sure it does, though you may have some issues when using punctuation, unnecessary words, or using capital letters for anything other than proper names. What version of PHP are you using? I get the correct answers for all of the following phrases: "last day of April 2014" "last day of this month" "last day of next month" "last day of last month" "third Saturday March 2012" Or you can even be excruciatingly redundant: echo date('d',strtotime('last day of this month',strtotime('next month'))); echo date('d',strtotime('last day of this month',strtotime('February 2018'))); echo date('d',strtotime('second Monday',strtotime('September 2012'))); I must admit I'm still at a loss why people would want a function to tell them the amount of days in a month. That amount is pretty much fixed (except for february, but that's also mathematically easy to fix). So a simple function like: function getAmountOfDaysInAMonth($month, $year) { $days = array(31, (($year%4==0 and ($year%100 > 0 or $year%400==0)) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); return $days[$month+1]; } Would work just fine. Unless of course you want to count the amount of days during the changing of calendars (ie during the change of the julian calendar to the gregorian), or in different calendars altogether. Why (ab)use the datetime library for such a very simple thing? In the last case, I would indeed use DateTime, simply because it's not an easy answer. - Tul -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Mar 9, 2012, at 12:52 PM, Charles wrote: > On Sat, Mar 10, 2012 at 12:07 AM, Tedd Sperling > wrote: >> >> Well no, I don't need to know the first day of next month to know the last >> day of this month. That's like saying "I need to know who is going to stand >> at the 'end of the line' NEXT before I can tell who is standing at the 'end >> of the' line NOW." > > You just said yourself that "I don't need to know the first day of > next month to know the last day of this month", and AFAIK there is no > such function in PHP to get the number of days > without accessing the last second in the month. Besides, showing how > it is done is part of education. Arrggg. When I said "I, I meant "I" and not a php function. Sometimes the point is never made. tedd _ tedd.sperl...@gmail.com http://sperling.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Sat, Mar 10, 2012 at 12:57 AM, Charles wrote: > On Sat, Mar 10, 2012 at 12:52 AM, Charles wrote: >> On Sat, Mar 10, 2012 at 12:07 AM, Tedd Sperling >> wrote: >>> On Mar 9, 2012, at 11:17 AM, Charles wrote: >>> On Fri, Mar 9, 2012 at 10:58 PM, Tedd Sperling wrote: > On Mar 9, 2012, at 5:37 AM, Ford, Mike wrote: >>> From: Tedd Sperling [mailto:tedd.sperl...@gmail.com] >>> But why does anyone have to use the next month to figure out how >>> many days there are are in this month? Do you see my point? >> >> Actually, no. To figure this out, somewhere along the line you've >> got to know where the last day of this month / first day of next >> month boundary lies, so I don't see how you can ever find the number >> of days in a month without bringing the start of next month into it >> somehow. (Even if it's implicitly be getting someone else's clever >> code to figure out 'last day of this month'!) > > Well no, I don't need to know the first day of next month to know the > last day of this month. That's like saying "I need to know who is going > to stand at the 'end of the line' NEXT before I can tell who is standing > at the 'end of the' line NOW." The number of days in each month is fixed, except for february. If that's what you want, why don't make a table of the number of days in each month, and check for the special case of leap year. >>> >>> No offense, but that's not the point. A look-up table would work, but why >>> when there are all sorts of built-in functions that will? >> >> You just said yourself that "I don't need to know the first day of >> next month to know the last day of this month", and AFAIK there is no >> such function in PHP to get the number of days >> without accessing the last second in the month. Besides, showing how >> it is done is part of education. > > Unless, of course you install the "calendar" extension, of which it > will provides just the required function > > http://php.net/manual/en/function.cal-days-in-month.php Okay, scratch that, the standard function works fine $number_of_days = idate('t', strtotime($year.'-'.$month)); -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
Charles wrote: >On Sat, Mar 10, 2012 at 12:52 AM, Charles wrote: >> On Sat, Mar 10, 2012 at 12:07 AM, Tedd Sperling > wrote: >>> On Mar 9, 2012, at 11:17 AM, Charles wrote: >>> On Fri, Mar 9, 2012 at 10:58 PM, Tedd Sperling > wrote: > On Mar 9, 2012, at 5:37 AM, Ford, Mike wrote: >>> From: Tedd Sperling [mailto:tedd.sperl...@gmail.com] >>> But why does anyone have to use the next month to figure out how >>> many days there are are in this month? Do you see my point? >> >> Actually, no. To figure this out, somewhere along the line you've >> got to know where the last day of this month / first day of next >> month boundary lies, so I don't see how you can ever find the >number >> of days in a month without bringing the start of next month into >it >> somehow. (Even if it's implicitly be getting someone else's >clever >> code to figure out 'last day of this month'!) > > Well no, I don't need to know the first day of next month to know >the last day of this month. That's like saying "I need to know who is >going to stand at the 'end of the line' NEXT before I can tell who is >standing at the 'end of the' line NOW." The number of days in each month is fixed, except for february. If that's what you want, why don't make a table of the number of days >in each month, and check for the special case of leap year. >>> >>> No offense, but that's not the point. A look-up table would work, >but why when there are all sorts of built-in functions that will? >> >> You just said yourself that "I don't need to know the first day of >> next month to know the last day of this month", and AFAIK there is no >> such function in PHP to get the number of days >> without accessing the last second in the month. Besides, showing how >> it is done is part of education. > >Unless, of course you install the "calendar" extension, of which it >will provides just the required function > >http://php.net/manual/en/function.cal-days-in-month.php > >-- >PHP General Mailing List (http://www.php.net/) >To unsubscribe, visit: http://www.php.net/unsub.php What about just doing this: intval(date("t")); And you can pass in an argument to date() if you need a specific month. Thanks, Ash http://ashleysheridan.co.uk -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Sat, Mar 10, 2012 at 12:52 AM, Charles wrote: > On Sat, Mar 10, 2012 at 12:07 AM, Tedd Sperling > wrote: >> On Mar 9, 2012, at 11:17 AM, Charles wrote: >> >>> On Fri, Mar 9, 2012 at 10:58 PM, Tedd Sperling >>> wrote: On Mar 9, 2012, at 5:37 AM, Ford, Mike wrote: >> From: Tedd Sperling [mailto:tedd.sperl...@gmail.com] >> But why does anyone have to use the next month to figure out how >> many days there are are in this month? Do you see my point? > > Actually, no. To figure this out, somewhere along the line you've > got to know where the last day of this month / first day of next > month boundary lies, so I don't see how you can ever find the number > of days in a month without bringing the start of next month into it > somehow. (Even if it's implicitly be getting someone else's clever > code to figure out 'last day of this month'!) Well no, I don't need to know the first day of next month to know the last day of this month. That's like saying "I need to know who is going to stand at the 'end of the line' NEXT before I can tell who is standing at the 'end of the' line NOW." >>> >>> The number of days in each month is fixed, except for february. If >>> that's what you want, why don't make a table of the number of days in >>> each month, and check for the special case of leap year. >> >> No offense, but that's not the point. A look-up table would work, but why >> when there are all sorts of built-in functions that will? > > You just said yourself that "I don't need to know the first day of > next month to know the last day of this month", and AFAIK there is no > such function in PHP to get the number of days > without accessing the last second in the month. Besides, showing how > it is done is part of education. Unless, of course you install the "calendar" extension, of which it will provides just the required function http://php.net/manual/en/function.cal-days-in-month.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Sat, Mar 10, 2012 at 12:07 AM, Tedd Sperling wrote: > On Mar 9, 2012, at 11:17 AM, Charles wrote: > >> On Fri, Mar 9, 2012 at 10:58 PM, Tedd Sperling >> wrote: >>> On Mar 9, 2012, at 5:37 AM, Ford, Mike wrote: > From: Tedd Sperling [mailto:tedd.sperl...@gmail.com] > But why does anyone have to use the next month to figure out how > many days there are are in this month? Do you see my point? Actually, no. To figure this out, somewhere along the line you've got to know where the last day of this month / first day of next month boundary lies, so I don't see how you can ever find the number of days in a month without bringing the start of next month into it somehow. (Even if it's implicitly be getting someone else's clever code to figure out 'last day of this month'!) >>> >>> Well no, I don't need to know the first day of next month to know the last >>> day of this month. That's like saying "I need to know who is going to stand >>> at the 'end of the line' NEXT before I can tell who is standing at the 'end >>> of the' line NOW." >> >> The number of days in each month is fixed, except for february. If >> that's what you want, why don't make a table of the number of days in >> each month, and check for the special case of leap year. > > No offense, but that's not the point. A look-up table would work, but why > when there are all sorts of built-in functions that will? You just said yourself that "I don't need to know the first day of next month to know the last day of this month", and AFAIK there is no such function in PHP to get the number of days without accessing the last second in the month. Besides, showing how it is done is part of education. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Mar 9, 2012, at 11:17 AM, Charles wrote: > On Fri, Mar 9, 2012 at 10:58 PM, Tedd Sperling > wrote: >> On Mar 9, 2012, at 5:37 AM, Ford, Mike wrote: From: Tedd Sperling [mailto:tedd.sperl...@gmail.com] But why does anyone have to use the next month to figure out how many days there are are in this month? Do you see my point? >>> >>> Actually, no. To figure this out, somewhere along the line you've >>> got to know where the last day of this month / first day of next >>> month boundary lies, so I don't see how you can ever find the number >>> of days in a month without bringing the start of next month into it >>> somehow. (Even if it's implicitly be getting someone else's clever >>> code to figure out 'last day of this month'!) >> >> Well no, I don't need to know the first day of next month to know the last >> day of this month. That's like saying "I need to know who is going to stand >> at the 'end of the line' NEXT before I can tell who is standing at the 'end >> of the' line NOW." > > The number of days in each month is fixed, except for february. If > that's what you want, why don't make a table of the number of days in > each month, and check for the special case of leap year. No offense, but that's not the point. A look-up table would work, but why when there are all sorts of built-in functions that will? I am just looking for one that is easy to explain to students. Cheers, tedd _ tedd.sperl...@gmail.com http://sperling.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Fri, Mar 9, 2012 at 10:58 PM, Tedd Sperling wrote: > On Mar 9, 2012, at 5:37 AM, Ford, Mike wrote: >>> From: Tedd Sperling [mailto:tedd.sperl...@gmail.com] >>> But why does anyone have to use the next month to figure out how >>> many days there are are in this month? Do you see my point? >> >> Actually, no. To figure this out, somewhere along the line you've >> got to know where the last day of this month / first day of next >> month boundary lies, so I don't see how you can ever find the number >> of days in a month without bringing the start of next month into it >> somehow. (Even if it's implicitly be getting someone else's clever >> code to figure out 'last day of this month'!) > > Well no, I don't need to know the first day of next month to know the last > day of this month. That's like saying "I need to know who is going to stand > at the 'end of the line' NEXT before I can tell who is standing at the 'end > of the' line NOW." The number of days in each month is fixed, except for february. If that's what you want, why don't make a table of the number of days in each month, and check for the special case of leap year. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Mar 9, 2012, at 5:37 AM, Ford, Mike wrote: >> From: Tedd Sperling [mailto:tedd.sperl...@gmail.com] >> But why does anyone have to use the next month to figure out how >> many days there are are in this month? Do you see my point? > > Actually, no. To figure this out, somewhere along the line you've > got to know where the last day of this month / first day of next > month boundary lies, so I don't see how you can ever find the number > of days in a month without bringing the start of next month into it > somehow. (Even if it's implicitly be getting someone else's clever > code to figure out 'last day of this month'!) Well no, I don't need to know the first day of next month to know the last day of this month. That's like saying "I need to know who is going to stand at the 'end of the line' NEXT before I can tell who is standing at the 'end of the' line NOW." I like things to be self-contained. For the exception of multiverse arguments, everything should be self evident. >> But instead, we have to use: >> >> $next_month = $this_month +1; >> $what_date = getdate(mktime(0, 0, 0, $next_month, 0, $year)); >> $days_in_this_month = $what_date['mday']; > > To me, that's a clever and elegant solution. It's clear that our > brains just work differently on this one. We all have differences in perception, how we analyze problems, and how we create solutions -- and that's a good thing. > Side-point: I find it interesting that getdate() has all sorts of >> neat descriptions for the current month (such as, what weekday a >> numbered day is), but lacks how many days are in the month. Doesn't >> that seem odd? > > Now that's a decent point: I can see where you're coming from with that > one. I don't know what performance penalty there might be (if any) to > calculate that for every call to getdate(), but it certainly seems like > a reasonable feature request. I'm glad I have a decent point somewhere in this exchange and that we agree on something. :-) Cheers, tedd _ tedd.sperl...@gmail.com http://sperling.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
(To the list, as well. First day with my new fingers, apparently) On Fri, Mar 9, 2012 at 08:09, Daniel Brown wrote: > On Thu, Mar 8, 2012 at 21:23, Tedd Sperling wrote: > > This starts getting a bit off-topic from your original email, but > knowing that you're trying to use it for teaching your classes at the > college, it may be of some value to you. > >>> All of this aside, though, you may instead want to use something along the >>> lines of date('d',strtotime('last day of this month')); in tandem with your >>> date formatting. >> >> That's a good idea, but >> >>> date('d',strtotime('last day of this month')); >> >> gives me the number of days in *this* month, but not the next, or previous, >> month. >> >> I need the result to be whatever date was selected -- something like: >> >> $number_days = date('d',strtotime('last day of April, 2014')); >> >> But that doesn't work. > > Sure it does, though you may have some issues when using > punctuation, unnecessary words, or using capital letters for anything > other than proper names. What version of PHP are you using? I get > the correct answers for all of the following phrases: > > "last day of April 2014" > "last day of this month" > "last day of next month" > "last day of last month" > "third Saturday March 2012" > > Or you can even be excruciatingly redundant: > > echo date('d',strtotime('last day of this > month',strtotime('next month'))); > echo date('d',strtotime('last day of this > month',strtotime('February 2018'))); > echo date('d',strtotime('second Monday',strtotime('September 2012'))); > > -- > > Network Infrastructure Manager > http://www.php.net/ -- Network Infrastructure Manager http://www.php.net/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
Ford, Mike wrote: Side-point: I find it interesting that getdate() has all sorts of > neat descriptions for the current month (such as, what weekday a > numbered day is), but lacks how many days are in the month. Doesn't > that seem odd? Now that's a decent point: I can see where you're coming from with that one. I don't know what performance penalty there might be (if any) to calculate that for every call to getdate(), but it certainly seems like a reasonable feature request. I've never had this problem ;) http://phplens.com/phpeverywhere/adodb_date_library -- Lester Caine - G8HFL - Contact - http://lsces.co.uk/wiki/?page=contact L.S.Caine Electronic Services - http://lsces.co.uk EnquirySolve - http://enquirysolve.com/ Model Engineers Digital Workshop - http://medw.co.uk// Firebird - http://www.firebirdsql.org/index.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Function mktime() documentation question
> -Original Message- > From: Tedd Sperling [mailto:tedd.sperl...@gmail.com] > Sent: 08 March 2012 23:15 > To: PHP-General List [previous discussion snipped] > Mike: > > Very well put. > > You say: > > > Huh? The 0th day of next month *is* the last day of the current > month, > > which gives you the number of days in the current month. > > That IS exactly what I am saying. > > But why does anyone have to use the next month to figure out how > many days there are are in this month? Do you see my point? Actually, no. To figure this out, somewhere along the line you've got to know where the last day of this month / first day of next month boundary lies, so I don't see how you can ever find the number of days in a month without bringing the start of next month into it somehow. (Even if it's implicitly be getting someone else's clever code to figure out 'last day of this month'!) > It would have been better if one could use: > > $what_date = getdate(mktime(0, 0, 0, $this_month, 0, $year)); > $days_in_this_month = $what_date['nday']; // note an additional key > for getdate() But that $what_date would still refer to a day in *last* month! (Which isn't going to change, as it would be a significant BC break.) > But instead, we have to use: > > $next_month = $this_month +1; > $what_date = getdate(mktime(0, 0, 0, $next_month, 0, $year)); > $days_in_this_month = $what_date['mday']; To me, that's a clever and elegant solution. It's clear that our brains just work differently on this one. > Additionally, there's a perception problem. You say that 0 of the > next month *is* the last day of the current month -- as such, > apparently months overlap in your (and Dan's) explanation. Well... I > agree with both of you, but my objection is having to increase the > month value by one to get the number of days in the current month. Not overlap as such, I don't think -- there's just a continuum such that the 0th of a month is the day before the 1st (and hence the last day of the preceding month!), the -1th is the day before that and so on; likewise, the 32nd is the day after the 31st, and so on. > Side-point: I find it interesting that getdate() has all sorts of > neat descriptions for the current month (such as, what weekday a > numbered day is), but lacks how many days are in the month. Doesn't > that seem odd? Now that's a decent point: I can see where you're coming from with that one. I don't know what performance penalty there might be (if any) to calculate that for every call to getdate(), but it certainly seems like a reasonable feature request. (And, actually, I think we should be quite grateful that mktime() *does* take out-of-range values and do appropriate things with them -- if it didn't, I suspect the only way to do this job might be a loop similar to the one posted by Tedd, but adding chunks of 86400 to a raw timestamp. Now that really would be a bit obscure!!!) Cheers! Mike -- Mike Ford, Electronic Information Developer, Libraries and Learning Innovation, Portland PD507, City Campus, Leeds Metropolitan University, Portland Way, LEEDS, LS1 3HE, United Kingdom E: m.f...@leedsmet.ac.uk T: +44 113 812 4730 To view the terms under which this email is distributed, please go to http://disclaimer.leedsmet.ac.uk/email.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Fri, Mar 9, 2012 at 9:23 AM, Tedd Sperling wrote: > On Mar 8, 2012, at 6:53 PM, Daniel Brown wrote: > On Mar 8, 2012 6:14 PM, "Tedd Sperling" wrote: >> >> > Side-point: I find it interesting that getdate() has all sorts of neat >> > descriptions for the current month (such as, what weekday a numbered day >> > is), but lacks how many days are in the month. Doesn't that seem odd? >> >> Oh, I see what you're saying now. Well, using getdate(), how else would you >> think to pass the parameter to get the last day other than using the current >> month and the last day (which would then obviously be overkill, of course). > > Well.. you could use any number that exceeds 31 -- or -- as I would have > suggested if it had been up to me, zero day would provide the number of days > in *that* month rather than the number of days in the previous month, which > was the point of my post. > >> All of this aside, though, you may instead want to use something along the >> lines of date('d',strtotime('last day of this month')); in tandem with your >> date formatting. > > That's a good idea, but > >> date('d',strtotime('last day of this month')); > > > gives me the number of days in *this* month, but not the next, or previous, > month. > > I need the result to be whatever date was selected -- something like: > > $number_days = date('d',strtotime('last day of April, 2014')); > > But that doesn't work. > > You see, I need something that makes sense to students. The idea that you > have to use the zero day (whatever that is) of the next month to see how many > days there are in this month is strange and confusing -- again my point. > > Thus far, the following looks better than what I came up with:: > > $what_date = getdate(mktime(0, 0, 0, $mon, 32, $year)); > $days_in_month = 32 - $what_date['mday']; > > But it's still strange. > > I was using: > > // get the last day of the month > $cont = true; > $tday = 27; > while (($tday <= 32) && ($cont)) > { > $tdate = getdate(mktime(0,0,0,$mon,$tday,$year)); > if ($tdate["mon"] != $mon) > { > $lastday = $tday - 1; > $cont = false; > } > $tday++; > } > > It made sense, but was too long. I figured there should be something better > and easier to explain -- but I'm still looking. function count_days($month, $year) { return (mktime(0, 0, 0, $month+1, 1, $year) - mktime(0, 0, 0, $month, 1, $year))/86400; } -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Mar 8, 2012, at 6:53 PM, Daniel Brown wrote: On Mar 8, 2012 6:14 PM, "Tedd Sperling" wrote: > > > Side-point: I find it interesting that getdate() has all sorts of neat > > descriptions for the current month (such as, what weekday a numbered day > > is), but lacks how many days are in the month. Doesn't that seem odd? > > Oh, I see what you're saying now. Well, using getdate(), how else would you > think to pass the parameter to get the last day other than using the current > month and the last day (which would then obviously be overkill, of course). Well.. you could use any number that exceeds 31 -- or -- as I would have suggested if it had been up to me, zero day would provide the number of days in *that* month rather than the number of days in the previous month, which was the point of my post. > All of this aside, though, you may instead want to use something along the > lines of date('d',strtotime('last day of this month')); in tandem with your > date formatting. That's a good idea, but > date('d',strtotime('last day of this month')); gives me the number of days in *this* month, but not the next, or previous, month. I need the result to be whatever date was selected -- something like: $number_days = date('d',strtotime('last day of April, 2014')); But that doesn't work. You see, I need something that makes sense to students. The idea that you have to use the zero day (whatever that is) of the next month to see how many days there are in this month is strange and confusing -- again my point. Thus far, the following looks better than what I came up with:: $what_date = getdate(mktime(0, 0, 0, $mon, 32, $year)); $days_in_month = 32 - $what_date['mday']; But it's still strange. I was using: // get the last day of the month $cont = true; $tday = 27; while (($tday <= 32) && ($cont)) { $tdate = getdate(mktime(0,0,0,$mon,$tday,$year)); if ($tdate["mon"] != $mon) { $lastday = $tday - 1; $cont = false; } $tday++; } It made sense, but was too long. I figured there should be something better and easier to explain -- but I'm still looking. Cheers tedd _ tedd.sperl...@gmail.com http://sperling.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On 03/08/2012 04:44 PM, Jim Lucas wrote: On 03/08/2012 04:31 PM, Jim Lucas wrote: On 03/08/2012 04:24 PM, Jim Lucas wrote: On 03/08/2012 03:14 PM, Tedd Sperling wrote: On Mar 8, 2012, at 11:20 AM, Ford, Mike wrote: -Original Message- From: Tedd Sperling [mailto:tedd.sperl...@gmail.com] From my code, the number of days in a month can be found by using 0 as the first index of the next month -- not the last day of the previous month. Huh? The 0th day of next month *is* the last day of the current month, which gives you the number of days in the current month. QED. I think it's possible you may be being confuzled by the number of nexts and previouses floating around. Your mktime call is asking for the 0th day of next month, i.e. the last day of the previous month of next month, i.e. the last day of the current month. Which is exactly what you say works. I think. :) However, I agree that the description is not very well worded - saying that days in the requested month are relative to the previous month is very odd indeed if you ask me -- if they must be relative to anything, why not the beginning of the relevant month? Actually, with a bit more thought, I think I'd rewrite it something like this: The day number relative to the given month. Day numbers 1 to 28, 29, 30 or 31 (depending on the month) refer to the normal days in the month. Numbers less than 1 refer to days in the previous month, so 0 is the last day of the preceding month, -1 the day before that, etc. Numbers greater than the actual number of days in the month refer to days in the following month(s). Mike: Very well put. You say: Huh? The 0th day of next month *is* the last day of the current month, which gives you the number of days in the current month. That IS exactly what I am saying. But why does anyone have to use the next month to figure out how many days there are are in this month? Do you see my point? It would have been better if one could use: $what_date = getdate(mktime(0, 0, 0, $this_month, 0, $year)); $days_in_this_month = $what_date['nday']; // note an additional key for getdate() But instead, we have to use: $next_month = $this_month +1; $what_date = getdate(mktime(0, 0, 0, $next_month, 0, $year)); $days_in_this_month = $what_date['mday']; Additionally, there's a perception problem. You say that 0 of the next month *is* the last day of the current month -- as such, apparently months overlap in your (and Dan's) explanation. Well... I agree with both of you, but my objection is having to increase the month value by one to get the number of days in the current month. That's all I was saying. Side-point: I find it interesting that getdate() has all sorts of neat descriptions for the current month (such as, what weekday a numbered day is), but lacks how many days are in the month. Doesn't that seem odd? Cheers, tedd _ tedd.sperl...@gmail.com http://sperling.com I am surprised that nobody has come up with this one yet. $what_date = getdate(mktime(0, 0, 0, $this_month, 35, $year)); $days_in_this_month = 35 - $what_date['mday']; Even a one liner... $what_date = getdate(mktime(0,0,0,$this_month,35,$year)-(35 * 86400)); Sorry, had my math backwards... $what_date = getdate((35 * 86400)-mktime(0,0,0,$this_month,35,$year)); Spoke too soon. Since you have to know the output of getdate() to calculate the minus figure... I guess that won't work. Use the first one that I suggested. -- Jim Lucas http://www.cmsws.com/ http://www.cmsws.com/examples/ http://www.bendsource.com/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On 03/08/2012 04:31 PM, Jim Lucas wrote: On 03/08/2012 04:24 PM, Jim Lucas wrote: On 03/08/2012 03:14 PM, Tedd Sperling wrote: On Mar 8, 2012, at 11:20 AM, Ford, Mike wrote: -Original Message- From: Tedd Sperling [mailto:tedd.sperl...@gmail.com] From my code, the number of days in a month can be found by using 0 as the first index of the next month -- not the last day of the previous month. Huh? The 0th day of next month *is* the last day of the current month, which gives you the number of days in the current month. QED. I think it's possible you may be being confuzled by the number of nexts and previouses floating around. Your mktime call is asking for the 0th day of next month, i.e. the last day of the previous month of next month, i.e. the last day of the current month. Which is exactly what you say works. I think. :) However, I agree that the description is not very well worded - saying that days in the requested month are relative to the previous month is very odd indeed if you ask me -- if they must be relative to anything, why not the beginning of the relevant month? Actually, with a bit more thought, I think I'd rewrite it something like this: The day number relative to the given month. Day numbers 1 to 28, 29, 30 or 31 (depending on the month) refer to the normal days in the month. Numbers less than 1 refer to days in the previous month, so 0 is the last day of the preceding month, -1 the day before that, etc. Numbers greater than the actual number of days in the month refer to days in the following month(s). Mike: Very well put. You say: Huh? The 0th day of next month *is* the last day of the current month, which gives you the number of days in the current month. That IS exactly what I am saying. But why does anyone have to use the next month to figure out how many days there are are in this month? Do you see my point? It would have been better if one could use: $what_date = getdate(mktime(0, 0, 0, $this_month, 0, $year)); $days_in_this_month = $what_date['nday']; // note an additional key for getdate() But instead, we have to use: $next_month = $this_month +1; $what_date = getdate(mktime(0, 0, 0, $next_month, 0, $year)); $days_in_this_month = $what_date['mday']; Additionally, there's a perception problem. You say that 0 of the next month *is* the last day of the current month -- as such, apparently months overlap in your (and Dan's) explanation. Well... I agree with both of you, but my objection is having to increase the month value by one to get the number of days in the current month. That's all I was saying. Side-point: I find it interesting that getdate() has all sorts of neat descriptions for the current month (such as, what weekday a numbered day is), but lacks how many days are in the month. Doesn't that seem odd? Cheers, tedd _ tedd.sperl...@gmail.com http://sperling.com I am surprised that nobody has come up with this one yet. $what_date = getdate(mktime(0, 0, 0, $this_month, 35, $year)); $days_in_this_month = 35 - $what_date['mday']; Even a one liner... $what_date = getdate(mktime(0,0,0,$this_month,35,$year)-(35 * 86400)); Sorry, had my math backwards... $what_date = getdate((35 * 86400)-mktime(0,0,0,$this_month,35,$year)); -- Jim Lucas http://www.cmsws.com/ http://www.cmsws.com/examples/ http://www.bendsource.com/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On 03/08/2012 04:24 PM, Jim Lucas wrote: On 03/08/2012 03:14 PM, Tedd Sperling wrote: On Mar 8, 2012, at 11:20 AM, Ford, Mike wrote: -Original Message- From: Tedd Sperling [mailto:tedd.sperl...@gmail.com] From my code, the number of days in a month can be found by using 0 as the first index of the next month -- not the last day of the previous month. Huh? The 0th day of next month *is* the last day of the current month, which gives you the number of days in the current month. QED. I think it's possible you may be being confuzled by the number of nexts and previouses floating around. Your mktime call is asking for the 0th day of next month, i.e. the last day of the previous month of next month, i.e. the last day of the current month. Which is exactly what you say works. I think. :) However, I agree that the description is not very well worded - saying that days in the requested month are relative to the previous month is very odd indeed if you ask me -- if they must be relative to anything, why not the beginning of the relevant month? Actually, with a bit more thought, I think I'd rewrite it something like this: The day number relative to the given month. Day numbers 1 to 28, 29, 30 or 31 (depending on the month) refer to the normal days in the month. Numbers less than 1 refer to days in the previous month, so 0 is the last day of the preceding month, -1 the day before that, etc. Numbers greater than the actual number of days in the month refer to days in the following month(s). Mike: Very well put. You say: Huh? The 0th day of next month *is* the last day of the current month, which gives you the number of days in the current month. That IS exactly what I am saying. But why does anyone have to use the next month to figure out how many days there are are in this month? Do you see my point? It would have been better if one could use: $what_date = getdate(mktime(0, 0, 0, $this_month, 0, $year)); $days_in_this_month = $what_date['nday']; // note an additional key for getdate() But instead, we have to use: $next_month = $this_month +1; $what_date = getdate(mktime(0, 0, 0, $next_month, 0, $year)); $days_in_this_month = $what_date['mday']; Additionally, there's a perception problem. You say that 0 of the next month *is* the last day of the current month -- as such, apparently months overlap in your (and Dan's) explanation. Well... I agree with both of you, but my objection is having to increase the month value by one to get the number of days in the current month. That's all I was saying. Side-point: I find it interesting that getdate() has all sorts of neat descriptions for the current month (such as, what weekday a numbered day is), but lacks how many days are in the month. Doesn't that seem odd? Cheers, tedd _ tedd.sperl...@gmail.com http://sperling.com I am surprised that nobody has come up with this one yet. $what_date = getdate(mktime(0, 0, 0, $this_month, 35, $year)); $days_in_this_month = 35 - $what_date['mday']; Even a one liner... $what_date = getdate(mktime(0,0,0,$this_month,35,$year)-(35 * 86400)); -- Jim Lucas http://www.cmsws.com/ http://www.cmsws.com/examples/ http://www.bendsource.com/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On 03/08/2012 03:14 PM, Tedd Sperling wrote: On Mar 8, 2012, at 11:20 AM, Ford, Mike wrote: -Original Message- From: Tedd Sperling [mailto:tedd.sperl...@gmail.com] From my code, the number of days in a month can be found by using 0 as the first index of the next month -- not the last day of the previous month. Huh? The 0th day of next month *is* the last day of the current month, which gives you the number of days in the current month. QED. I think it's possible you may be being confuzled by the number of nexts and previouses floating around. Your mktime call is asking for the 0th day of next month, i.e. the last day of the previous month of next month, i.e. the last day of the current month. Which is exactly what you say works. I think. :) However, I agree that the description is not very well worded - saying that days in the requested month are relative to the previous month is very odd indeed if you ask me -- if they must be relative to anything, why not the beginning of the relevant month? Actually, with a bit more thought, I think I'd rewrite it something like this: The day number relative to the given month. Day numbers 1 to 28, 29, 30 or 31 (depending on the month) refer to the normal days in the month. Numbers less than 1 refer to days in the previous month, so 0 is the last day of the preceding month, -1 the day before that, etc. Numbers greater than the actual number of days in the month refer to days in the following month(s). Mike: Very well put. You say: Huh? The 0th day of next month *is* the last day of the current month, which gives you the number of days in the current month. That IS exactly what I am saying. But why does anyone have to use the next month to figure out how many days there are are in this month? Do you see my point? It would have been better if one could use: $what_date = getdate(mktime(0, 0, 0, $this_month, 0, $year)); $days_in_this_month = $what_date['nday']; // note an additional key for getdate() But instead, we have to use: $next_month = $this_month +1; $what_date = getdate(mktime(0, 0, 0, $next_month, 0, $year)); $days_in_this_month = $what_date['mday']; Additionally, there's a perception problem. You say that 0 of the next month *is* the last day of the current month -- as such, apparently months overlap in your (and Dan's) explanation. Well... I agree with both of you, but my objection is having to increase the month value by one to get the number of days in the current month. That's all I was saying. Side-point: I find it interesting that getdate() has all sorts of neat descriptions for the current month (such as, what weekday a numbered day is), but lacks how many days are in the month. Doesn't that seem odd? Cheers, tedd _ tedd.sperl...@gmail.com http://sperling.com I am surprised that nobody has come up with this one yet. $what_date = getdate(mktime(0, 0, 0, $this_month, 35, $year)); $days_in_this_month = 35 - $what_date['mday']; -- Jim Lucas http://www.cmsws.com/ http://www.cmsws.com/examples/ http://www.bendsource.com/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Mar 8, 2012 6:14 PM, "Tedd Sperling" wrote: > > On Mar 8, 2012, at 11:20 AM, Ford, Mike wrote: > >> -Original Message- > >> From: Tedd Sperling [mailto:tedd.sperl...@gmail.com] > >> From my code, the number of days in a month can be found by using 0 > >> as the first index of the next month -- not the last day of the > >> previous month. > > > > Huh? The 0th day of next month *is* the last day of the current month, > > which gives you the number of days in the current month. QED. > > I think it's possible you may be being confuzled by the number of > > nexts and previouses floating around. Your mktime call is asking for > > the 0th day of next month, i.e. the last day of the previous month of > > next month, i.e. the last day of the current month. Which is exactly > > what you say works. I think. :) > > > > However, I agree that the description is not very well worded - saying > > that days in the requested month are relative to the previous month is > > very odd indeed if you ask me -- if they must be relative to anything, > > why not the beginning of the relevant month? Actually, with a bit more > > thought, I think I'd rewrite it something like this: > > > > The day number relative to the given month. Day numbers 1 to 28, 29, > > 30 or 31 (depending on the month) refer to the normal days in the > > month. Numbers less than 1 refer to days in the previous month, so 0 > > is the last day of the preceding month, -1 the day before that, etc. > > Numbers greater than the actual number of days in the month refer to > > days in the following month(s). > > > > Mike: > > Very well put. > > You say: > > > Huh? The 0th day of next month *is* the last day of the current month, > > which gives you the number of days in the current month. > > That IS exactly what I am saying. > > But why does anyone have to use the next month to figure out how many days there are are in this month? Do you see my point? > > It would have been better if one could use: > > $what_date = getdate(mktime(0, 0, 0, $this_month, 0, $year)); > $days_in_this_month = $what_date['nday']; // note an additional key for getdate() > > But instead, we have to use: > > $next_month = $this_month +1; > $what_date = getdate(mktime(0, 0, 0, $next_month, 0, $year)); > $days_in_this_month = $what_date['mday']; > > Additionally, there's a perception problem. You say that 0 of the next month *is* the last day of the current month -- as such, apparently months overlap in your (and Dan's) explanation. Well... I agree with both of you, but my objection is having to increase the month value by one to get the number of days in the current month. > > That's all I was saying. > > Side-point: I find it interesting that getdate() has all sorts of neat descriptions for the current month (such as, what weekday a numbered day is), but lacks how many days are in the month. Doesn't that seem odd? Oh, I see what you're saying now. Well, using getdate(), how else would you think to pass the parameter to get the last day other than using the current month and the last day (which would then obviously be overkill, of course). All of this aside, though, you may instead want to use something along the lines of date('d',strtotime('last day of this month')); in tandem with your date formatting.
Re: [PHP] Function mktime() documentation question
On Mar 8, 2012, at 11:20 AM, Ford, Mike wrote: >> -Original Message- >> From: Tedd Sperling [mailto:tedd.sperl...@gmail.com] >> From my code, the number of days in a month can be found by using 0 >> as the first index of the next month -- not the last day of the >> previous month. > > Huh? The 0th day of next month *is* the last day of the current month, > which gives you the number of days in the current month. QED. > I think it's possible you may be being confuzled by the number of > nexts and previouses floating around. Your mktime call is asking for > the 0th day of next month, i.e. the last day of the previous month of > next month, i.e. the last day of the current month. Which is exactly > what you say works. I think. :) > > However, I agree that the description is not very well worded - saying > that days in the requested month are relative to the previous month is > very odd indeed if you ask me -- if they must be relative to anything, > why not the beginning of the relevant month? Actually, with a bit more > thought, I think I'd rewrite it something like this: > > The day number relative to the given month. Day numbers 1 to 28, 29, > 30 or 31 (depending on the month) refer to the normal days in the > month. Numbers less than 1 refer to days in the previous month, so 0 > is the last day of the preceding month, -1 the day before that, etc. > Numbers greater than the actual number of days in the month refer to > days in the following month(s). > Mike: Very well put. You say: > Huh? The 0th day of next month *is* the last day of the current month, > which gives you the number of days in the current month. That IS exactly what I am saying. But why does anyone have to use the next month to figure out how many days there are are in this month? Do you see my point? It would have been better if one could use: $what_date = getdate(mktime(0, 0, 0, $this_month, 0, $year)); $days_in_this_month = $what_date['nday']; // note an additional key for getdate() But instead, we have to use: $next_month = $this_month +1; $what_date = getdate(mktime(0, 0, 0, $next_month, 0, $year)); $days_in_this_month = $what_date['mday']; Additionally, there's a perception problem. You say that 0 of the next month *is* the last day of the current month -- as such, apparently months overlap in your (and Dan's) explanation. Well... I agree with both of you, but my objection is having to increase the month value by one to get the number of days in the current month. That's all I was saying. Side-point: I find it interesting that getdate() has all sorts of neat descriptions for the current month (such as, what weekday a numbered day is), but lacks how many days are in the month. Doesn't that seem odd? Cheers, tedd _ tedd.sperl...@gmail.com http://sperling.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Mar 7, 2012, at 4:28 PM, Daniel Brown wrote: > On Wed, Mar 7, 2012 at 15:03, Tedd Sperling wrote: >> Hi gang: >> >> I am using the getdate(mktime()) functions to get month data (i.e., name of >> month, first weekday, last day, number of days). >> >> To get the number of days for a specific month, I use: >> >> // $current_month is the month under question >> >> $next_month = $current_month + 1; >> $what_date = getdate(mktime(0, 0, 0, $next_month, 0, $year)); >> $days_in_current_month = $what_date['mday']; >> >> That works for me! >> >> However, if you read the documentation, namely: >> >> http://php.net/manual/en/function.mktime.php >> >> It states: >> >> --- quote >> >> day >> >> The number of the day relative to the end of the previous month. Values 1 to >> 28, 29, 30 or 31 (depending upon the month) reference the normal days in the >> relevant month. Values less than 1 (including negative values) reference the >> days in the previous month, so 0 is the last day of the previous month, -1 >> is the day before that, etc. Values greater than the number of days in the >> relevant month reference the appropriate day in the following month(s). >> --- un-quote >> >> From my code, the number of days in a month can be found by using 0 as the >> first index of the next month -- not the last day of the previous month. > >I fail to follow. Your code is looking ahead to next month > (April), then using the 0 day, which means it's getting the last day > (31) of the current month (March). There's no such thing as a 0 > April, hence anything less than one should count backward. > > -- > Daniel: Yes, it uses next month to figure out this month -- that's my point. See my reply to Mike Ford. Cheers, tedd _ tedd.sperl...@gmail.com http://sperling.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
On Thu, Mar 8, 2012 at 7:01 AM, Simon Schick wrote: > $date = new DateTime($year . '-' . $current_month . '-1'); > $date->add( new DateInterval( 'P1M' ) ); // Add a period of 1 month to > the date-instance (haven't tried that with the 30th of Jan ... would > be kind-of interesting) > > $days_in_current_month = $date->format('j'); // Get the date of the month I think you'd need to subtract it with 1 day date_create(date('Y-m'))->add(new DateInterval('P1M'))->sub(new DateInterval('P1D'))->format('d'); -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
Hi, All To bring a work-around into this discussion I myself would not see it as a good way to do it like that - even if the documentation provides some information around that. Here's what I have done in all new projects I worked with time-calculation: @Tedd: Lets pick up your first example and work with the DateTime-Object instead: $date = new DateTime($year . '-' . $current_month . '-1'); $date->add( new DateInterval( 'P1M' ) ); // Add a period of 1 month to the date-instance (haven't tried that with the 30th of Jan ... would be kind-of interesting) $days_in_current_month = $date->format('j'); // Get the date of the month As this does not solve the problem (as we still should update the documentation or the code if it does not match) it's not a solution, but a suggestion to coding-style at all. It seems a bit cleaner to me as you don't have to worry about the 13th month, time-zones or other things that can be difficult to calculate yourself. Bye Simon 2012/3/8 shiplu : >> To get the number of days for a specific month, I use: >> >> // $current_month is the month under question >> >> $next_month = $current_month + 1; > > I use this > > $next_month = $current_month + 1; > $next_month_1 = mktime(0, 0, 0, $next_month, 1, date("Y") ); > $current_month_1= mktime(0, 0, 0, $current_month, 1, date("Y") ); > $mdays = ($current_month_1 - $next_month_1)/(3600*24); > > It's much more easier if you use DateTime and DateInterval class > > > > -- > Shiplu.Mokadd.im > ImgSign.com | A dynamic signature machine > Innovation distinguishes between follower and leader -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Function mktime() documentation question
> To get the number of days for a specific month, I use: > > // $current_month is the month under question > > $next_month = $current_month + 1; I use this $next_month = $current_month + 1; $next_month_1= mktime(0, 0, 0, $next_month, 1, date("Y") ); $current_month_1= mktime(0, 0, 0, $current_month, 1, date("Y") ); $mdays = ($current_month_1 - $next_month_1)/(3600*24); It's much more easier if you use DateTime and DateInterval class -- Shiplu.Mokadd.im ImgSign.com | A dynamic signature machine Innovation distinguishes between follower and leader
Re: [PHP] Function mktime() documentation question
On Wed, Mar 7, 2012 at 15:03, Tedd Sperling wrote: > Hi gang: > > I am using the getdate(mktime()) functions to get month data (i.e., name of > month, first weekday, last day, number of days). > > To get the number of days for a specific month, I use: > > // $current_month is the month under question > > $next_month = $current_month + 1; > $what_date = getdate(mktime(0, 0, 0, $next_month, 0, $year)); > $days_in_current_month = $what_date['mday']; > > That works for me! > > However, if you read the documentation, namely: > > http://php.net/manual/en/function.mktime.php > > It states: > > --- quote > > day > > The number of the day relative to the end of the previous month. Values 1 to > 28, 29, 30 or 31 (depending upon the month) reference the normal days in the > relevant month. Values less than 1 (including negative values) reference the > days in the previous month, so 0 is the last day of the previous month, -1 is > the day before that, etc. Values greater than the number of days in the > relevant month reference the appropriate day in the following month(s). > --- un-quote > > From my code, the number of days in a month can be found by using 0 as the > first index of the next month -- not the last day of the previous month. I fail to follow. Your code is looking ahead to next month (April), then using the 0 day, which means it's getting the last day (31) of the current month (March). There's no such thing as a 0 April, hence anything less than one should count backward. -- Network Infrastructure Manager http://www.php.net/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Function mktime() documentation question
Tedd, This area was always a little grey to me. I have used -1 to obtain the previous months for some time now. 0 always indicated the beginning index of the current month but the explanation never seemed to fit the bill. Having worked extensively in time manipulation in many of the development projects I have come up with a rule of thumb. $this_month = date('Y-m-d 00:00:00',mktime(0,0,0,date('m'),1,date('Y'))); $previous_month = date('Y-m-d 00:00:00',mktime(0,0,0,date('m')-1,1,date('Y'))); $next_month = date('Y-m-d 00:00:00',mktime(0,0,0,date('m')+1,1,date('Y'))); To get the days of any given month or just about anything you need to just use the strtotime $days_in_month = date('j',strtotime($this_month)); -Original Message- From: Tedd Sperling [mailto:tedd.sperl...@gmail.com] Sent: Wednesday, March 07, 2012 3:04 PM To: PHP-General List Subject: [PHP] Function mktime() documentation question Hi gang: I am using the getdate(mktime()) functions to get month data (i.e., name of month, first weekday, last day, number of days). To get the number of days for a specific month, I use: // $current_month is the month under question $next_month = $current_month + 1; $what_date = getdate(mktime(0, 0, 0, $next_month, 0, $year)); $days_in_current_month = $what_date['mday']; That works for me! However, if you read the documentation, namely: http://php.net/manual/en/function.mktime.php It states: --- quote day The number of the day relative to the end of the previous month. Values 1 to 28, 29, 30 or 31 (depending upon the month) reference the normal days in the relevant month. Values less than 1 (including negative values) reference the days in the previous month, so 0 is the last day of the previous month, -1 is the day before that, etc. Values greater than the number of days in the relevant month reference the appropriate day in the following month(s). --- un-quote >From my code, the number of days in a month can be found by using 0 as the first index of the next month -- not the last day of the previous month. As such, I would re-write the relevant portion of the paragraph to be: day The number of the day relative to the end of the previous month. Values 1 to 28, 29, 30 or 31 (depending upon the month) reference the normal days in the relevant month. Values less than 0 reference the days in the previous month. For example, -1 is the day before the first day of the relevant month. The value 0 is the zero index of the next month, which is also equal to the last day of the relevant month. Values greater than zero are the number of days in the relevant month reference the appropriate day in the following month(s). What say you? Cheers, tedd _ tedd.sperl...@gmail.com http://sperling.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php