Discussion: How to use PHP to calculate the year, month, week, and day of two date intervals _php tutorial

Use the PHP implementation to calculate the year, month, week, and day of two date intervals:
Copy CodeThe code is as follows:
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 '));
?>

Operation Result:
Array ([extends]=>75[monthly]=>2[weekly]=>2)

PHP queries the number of weeks in a day and the start date of the corresponding week
Copy the Code code as follows:
/**
* @file
* @version 1.1
* @author QQ83989686
* @date last modified on 2012-8-7
* @brief
*/
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));
}

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