PHP

100 Checkdate & Date_diff
1

1

1

272days

DateInterval Object
(
    [y] => 0
    [m] => 8
    [d] => 27
    [h] => 0
    [i] => 0
    [s] => 0
    [f] => 0
    [weekday] => 0
    [weekday_behavior] => 0
    [first_last_day_of] => 0
    [invert] => 0
    [days] => 272
    [special_type] => 0
    [special_amount] => 0
    [have_weekday_relative] => 0
    [have_special_relative] => 0
)

-278 9 days

DateInterval Object
(
    [y] => 0
    [m] => 9
    [d] => 3
    [h] => 0
    [i] => 0
    [s] => 0
    [f] => 0
    [weekday] => 0
    [weekday_behavior] => 0
    [first_last_day_of] => 0
    [invert] => 1
    [days] => 278
    [special_type] => 0
    [special_amount] => 0
    [have_weekday_relative] => 0
    [have_special_relative] => 0
)

   <?php
      // 100 Checkdate & Date_diff  
   echo "</br><span class='myheading'>100 Checkdate & Date_diff</span></br>";

   echo checkdate(2, 15, 2014). "<br><br>"; // true = 1
   echo checkdate(2, 29, 2016). "<br><br>"; // true = 1
   echo checkdate(2, 29, 2005). "<br><br>"; // false = 0
   echo checkdate(2, 15, 2024). "<br><br>"; // true = 1

   $date1 = date_create("2013-03-15");
   $date2 = date_create("2013-12-12");
   $diff = date_diff($date1,$date2); // days difference between two date

   echo $diff->days . "days";

   echo "<pre>";
   print_r($diff);
   echo "</pre>";

   $date1 = date_create("2013-12-15");
   $date2 = date_create("2013-03-12");
   $diff = date_diff($date1,$date2); // if result is in negative value

   echo $diff->format("%R%a %m days"); // %R show the negative sign
   echo "<pre>";
   print_r($diff);
   echo "</pre>";
   ?>