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Digg  cal_days_in_month
Return the number of days in a month for a given year and calendar
(PHP 4 >= 4.0.7, PHP 5)
Example 364. cal_days_in_month() example<?phpRelated Examples ( Source code ) » cal_days_in_month Examples ( Source code ) » Simple Calendar Applications Code Examples / Notes » cal_days_in_monthjeffbeall
This will work great in future dates but will give the wrong answer for dates before 1550 (approx) when leap year was introduced and the calendar lost a year or two. Sorry now to be more specific it has been a while sine I had to account for those later dates and had to take that into account but just a heads up for others to watch out. nighma
Stay simple ;) $ndays = date("t"); //return the number of days for this month and this year $ndays = date("t", mktime(0, 0, 0, 12, 1, 2004)); // You can also specify a date c u pasci - webmaster
Here's the one line solution without loops or other slow stuff ;) <?php $daynum = date("j",mktime(0,0,0,$month+1,0,$year)); ?> dbindel
Here's a one-line function I just wrote to find the numbers of days in a month that doesn't depend on any other functions. The reason I made this is because I just found out I forgot to compile PHP with support for calendars, and a class I'm writing for my website's open source section was broken. So rather than recompiling PHP (which I will get around to tomorrow I guess), I just wrote this function which should work just as well, and will always work without the requirement of PHP's calendar extension or any other PHP functions for that matter. I learned the days of the month using the old knuckle & inbetween knuckle method, so that should explain the mod 7 part. :) <?php /* * days_in_month($month, $year) * Returns the number of days in a given month and year, taking into account leap years. * * $month: numeric month (integers 1-12) * $year: numeric year (any integer) * * Prec: $month is an integer between 1 and 12, inclusive, and $year is an integer. * Post: none */ // corrected by ben at sparkyb dot net function days_in_month($month, $year) { // calculate number of days in a month return $month == 2 ? ($year % 4 ? 28 : ($year % 100 ? 29 : ($year % 400 ? 28 : 29))) : (($month - 1) % 7 % 2 ? 30 : 31); } ?> Enjoy, David Bindel paul
Here is a nifty function to return the date for easter for ranges beyond 2037 or before 1970. <?php function str_easter_date ($year) { $days = easter_days ($year); $days_in_march = cal_days_in_month (CAL_GREGORIAN, 3, $year); if (($days + 21) < $days_in_march) { $month = "March"; $date = $days + 21; } else { $month = "April"; $date = ($days + 21) - $days_in_march; } return "$month $date, $year"; } ?> sasha
function days_in_month($a_month, $a_year) { return date('t', strtotime($a_year . '-' . $a_month . '-01')); } geko45pj
<?php # PHP Calendar (version 2.3), written by Keith Devens function generate_calendar($year, $month, $days = array(), $day_name_length = 3, $month_href = NULL, $first_day = 0, $pn = array()){ $first_of_month = gmmktime(0,0,0,$month,1,$year); #remember that mktime will automatically correct if invalid dates are entered # for instance, mktime(0,0,0,12,32,1997) will be the date for Jan 1, 1998 # this provides a built in "rounding" feature to generate_calendar() $day_names = array(); #generate all the day names according to the current locale for($n=0,$t=(3+$first_day)*86400; $n<7; $n++,$t+=86400) #January 4, 1970 was a Sunday $day_names[$n] = ucfirst(gmstrftime('%A',$t)); #%A means full textual day name list($month, $year, $month_name, $weekday) = explode(',',gmstrftime('%m,%Y,%B,%w',$first_of_month)); $weekday = ($weekday + 7 - $first_day) % 7; #adjust for $first_day $title = htmlentities(ucfirst($month_name)).' '.$year; #note that some locales don't capitalize month and day names #Begin calendar. Uses a real <caption>. See http://diveintomark.org/archives/2002/07/03 @list($p, $pl) = each($pn); @list($n, $nl) = each($pn); #previous and next links, if applicable if($p) $p = '<span class="calendar-prev">'.($pl ? '<a href="'.htmlspecialchars($pl).'">'.$p.'</a>' : $p).'</span> '; if($n) $n = ' <span class="calendar-next">'.($nl ? '<a href="'.htmlspecialchars($nl).'">'.$n.'</a>' : $n).'</span>'; $calendar = '<table class="calendar">'."\n". '<caption class="calendar-month">'.$p.($month_href ? '<a href="'.htmlspecialchars($month_href).'">'.$title.'</a>' : $title).$n."</caption>\n<tr>"; if($day_name_length){ #if the day names should be shown ($day_name_length > 0) #if day_name_length is >3, the full name of the day will be printed foreach($day_names as $d) $calendar .= '<th abbr="'.htmlentities($d).'">'.htmlentities($day_name_length < 4 ? substr($d,0,$day_name_length) : $d).'</th>'; $calendar .= "</tr>\n<tr>"; } if($weekday > 0) $calendar .= '<td colspan="'.$weekday.'"> </td>'; #initial 'empty' days for($day=1,$days_in_month=gmdate('t',$first_of_month); $day<=$days_in_month; $day++,$weekday++){ if($weekday == 7){ $weekday = 0; #start a new week $calendar .= "</tr>\n<tr>"; } if(isset($days[$day]) and is_array($days[$day])){ @list($link, $classes, $content) = $days[$day]; if(is_null($content)) $content = $day; $calendar .= '<td'.($classes ? ' class="'.htmlspecialchars($classes).'">' : '>'). ($link ? '<a href="'.htmlspecialchars($link).'">'.$content.'</a>' : $content).'</td>'; } else $calendar .= "<td>$day</td>"; } if($weekday != 7) $calendar .= '<td colspan="'.(7-$weekday).'"> </td>'; #remaining "empty" days return $calendar."</tr>\n</table>\n"; } echo generate_calendar(2010, 12, 16,3,NULL,0,15, $first_of_month, $day_names, $day_names[$n]); #echo generate_calendar($year, $month, $days,$day_name_length,$month_href,$first_day,$pn); ?> |
