Share PHP code _php tips for calculating days of difference between two dates

The example in this article describes how PHP calculates the number of days between two dates. Share to everyone for your reference. The implementation method is as follows:

<?php $date 1 = date (' y-m-d ');
$date 2 = "2015-12-04";
$diff = ABS (Strtotime ($date 2)-Strtotime ($date 1));
$years = Floor ($diff/(365*60*60*24));
$months = Floor (($diff-$years * 365*60*60*24)/(30*60*60*24));
$days = Floor (($diff-$years * 365*60*60*24-$months *30*60*60*24)/(60*60*24));
printf ("%d years,%d months,%d days\n", $years, $months, $days);
--------------------------------------------------------OR $date 1 = new DateTime ("2007-03-24");
$date 2 = new DateTime ("2009-06-26");
$interval = $date 1->diff ($date 2); echo "Difference". $interval->y. "Years," he said. 
$interval->m. "Months," $interval->d. "Days"; Shows the total amount of days (not divided to years, months and days like above) echo "difference". $interval->days.
"Days"; --------------------------------------------------------OR/** * Calculate differences between two dates with Preci SE semantics. Based on Phps DateTime::d iff () * implementation by Derick Rethans. Ported to PHPby Emil H, 2011-05-02.
No rights reserved. */function _date_range_limit ($start, $end, $adj, $a, $b, $result) {if ($result [$a] < $start) {$result [$b] = Intv
  Al (($start-$result [$a]-1)/$adj) + 1;
 $result [$a] + + = $adj * Intval ($start-$result [$a]-1)/$adj + 1);
  } if ($result [$a] >= $end) {$result [$b] + + = intval ($result [$a]/$ADJ);
 $result [$a]-= $adj * Intval ($result [$a]/$ADJ);
return $result; function _date_range_limit_days ($base, $result) {$days _in_month_leap = array (31, 31, 29, 31, 30, 31, 30, 31, 31, 30, 3
 1, 30, 31);
 $days _in_month = Array (31, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
 _date_range_limit (1, N, "M", "Y", & $base);
 $year = $base ["Y"];
 $month = $base ["M"];
   if (! $result ["invert"]) {while ($result ["D"] < 0) {$month-;
    if ($month < 1) {$month + = 12;
   $year--; } $leapyear = $year% 400 = 0 | |
   ($year%!= 0 && $year% 4 = 0); $days = $leapyear? $days _in_month_leap[$month] : $days _in_month[$month];
   $result ["D"] + = $days;
  $result ["M"]--; } else {while ($result ["D"] < 0) {$leapyear = $year% 400 = 0 | |
   ($year%!= 0 && $year% 4 = 0); $days = $leapyear?
   $days _in_month_leap[$month]: $days _in_month[$month];
   $result ["D"] + = $days;
   $result ["M"]--;
   $month + +;
    if ($month >) {$month-= 12;
   $year + +;
}} return $result;
 function _date_normalize ($base, $result) {$result = _date_range_limit (0, N, "s", "I", $result);
 $result = _date_range_limit (0, M, "I", "H", $result);
 $result = _date_range_limit (0, N, "H", "D", $result);
 $result = _date_range_limit (0, a, "M", "Y", $result);
 $result = _date_range_limit_days (& $base, & $result);
 $result = _date_range_limit (0, a, "M", "Y", $result);
return $result;
 }/** * accepts two UNIX timestamps.
 */function _date_diff ($one, $two) {$invert = false;
 if ($one > $two) {list ($one, $two) = Array ($two, $one); $invert = true;
 $key = Array ("Y", "M", "D", "H", "I", "s");
 $a = Array_combine ($key, Array_map ("Intval", Explode ("", Date ("Y m D H i S", $one)));
 $b = Array_combine ($key, Array_map ("Intval", Explode ("", Date ("Y m D H i S", $two)));
 $result = Array ();
 $result ["y"] = $b ["y"]-$a ["Y"];
 $result ["M"] = $b ["M"]-$a ["M"];
 $result ["d"] = $b ["D"]-$a ["D"];
 $result ["h"] = $b ["h"]-$a ["H"];
 $result ["i"] = $b ["i"]-$a ["I"];
 $result ["s"] = $b ["s"]-$a ["s"]; $result ["invert"] = $invert?
 1:0;
 $result ["days"] = Intval (ABS ($one-$two)/86400);
 if ($invert) {_date_normalize (& $a, & $result);
 else {_date_normalize (& $b, & $result);
return $result;
} $date = "2014-12-04 19:37:22";
Echo ' <pre> ';
Print_r (_date_diff (Strtotime ($date), Time ())); 
Echo ' </pre> ';
 ?>

Hopefully this article will help you learn about PHP programming.