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

Use the PHP implementation to calculate the number of years, months, weeks, and days for two date intervals:

Copy Code code as follows:

<?php
function format ($a, $b) {
Check two date size, the default is small after the big, if the former large and small then swap position to ensure that before small after the big
if (Strtotime ($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 the number of days returned directly is less than 7 days
$result [' daily '] = $extend;
}elseif ($extend <=31) {///less than 28 days returns the number of weeks, due to the leap year February met
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 ', $start);
It's been a year since you've been judged, but if you don't, you can cut it.
if ($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 '));
?>

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

PHP Query the number of weeks in the day and the start date of the corresponding week

Copy Code code as follows:

/**
* @file
* @version 1.1
* @author QQ83989686
* @date 2012-8-7 Last modification time
* @brief
*/
Gets the week number of a date, the start end time of 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)-($g-1) *86400), ' WEEK_START_DAY_CN ' =>strftime ('%y%m month%d days ', Strtotime ($day)-($g-1) *86400), ' week_end_day ' = >strftime ('%y-%m-%d ', Strtotime ($day) + (7-$g) *86400), ' WEEK_END_DAY_CN ' =>strftime ('%Y year%m month%d days ', Strtotime ($ Day) + (7-$g) *86400);
}