code example for PHP to calculate the year, month, week, and day of two date intervals

/** * Calculates the year, month, week, and day of two date intervals * Edit bbs.it-home.org */ function format ($a, $b) { Check the two date size, the default is small after large, if the former large after the small swap position to ensure that the former small after large if (Strtotime ($a) >strtotime ($b)) list ($a, $b) =array ($b, $a); $start = Strtotime ($a); $stop = Strtotime ($b); $extend = ($stop-$start)/86400; $result [' extends '] = $extend; if ($extend <7) {//if less than 7 days direct return days $result [' daily '] = $extend; }elseif ($extend <=31) {///less than 28 days returns the number of weeks, as leap year February satisfies if ($stop ==strtotime ($a. ' +1 month ')) { $result [' monthly '] = 1; }else{ $w = Floor ($extend/7); $d = ($stop-strtotime ($a. ' + '. $w. ' Week ')/86400; $result [' weekly '] = $w; $result [' daily '] = $d; } }else{ $y = Floor ($extend/365); if ($y >=1) {//If more than one year $start = Strtotime ($a. ' + '. $y. ' year '); $a = date (' y-m-d ', $start); Judging whether it really has been a year, if not, then cut if ($start > $stop) { $a = date (' y-m-d ', strtotime ($a. '-1 month ')); $m = 11; $y--; } $extend = ($stop-strtotime ($a))/86400; } if (Isset ($m)) { $w = Floor ($extend/7); $d = $extend-$w *7; }else{ $m = Isset ($m)? $m: Round ($extend/30); $stop >=strtotime ($a. ' + '. $m. ' Month ')? $m: $m-; if ($stop >=strtotime ($a. ' + '. $m. ' Month ')} { $d = $w = ($stop-strtotime ($a. ' + '. $m. ' Month ')/86400; $w = Floor ($w/7); $d = $d-$w *7; } } $result [' yearly '] = $y; $result [' monthly '] = $m; $result [' weekly '] = $w; $result [' daily '] = Isset ($d)? $d: null; } Return Array_filter ($result); } Print_r (Format (' 2012-10-1 ', ' 2012-12-15 ')); ?> Copy Code Output result: Array ([extends]=>75[monthly]=>2[weekly]=>2) 2,php Query the number of weeks in a day and the start date of the corresponding week /** * @file * @version 1.1 */ Gets the week number of a date, the start end time for the week Private Function Getweekstartendday ($day) { $g = strftime ("%u", Strtotime ($day)); Return Array (' Week_num ' =>strftime ("%V", Strtotime ($day)), ' Week_start_day ' =>strftime ('%y-%m-%d ', Strtotime ($ Day)-($g-1) *86400), ' WEEK_START_DAY_CN ' =>strftime ('%y year%m month%d ', Strtotime ($day)-($g-1) *86400), ' week_end_day ' = >strftime ('%y-%m-%d ', Strtotime ($day) + (7-$g) *86400), ' WEEK_END_DAY_CN ' =>strftime ('%Y year%m month%d day ', Strtotime ($ Day) + (7-$g) *86400)); } ?> Copy Code

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