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run code in 200+ php & hhvm versions
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<?php $datetime1 = new DateTime('2015-12-20'); $datetime2 = new DateTime('2015-12-24'); $interval = $datetime1->diff($datetime2); print_r($interval);exit; $elapsed = $interval->format('%y years, %m months, %d days'); echo $elapsed;
based on ME2kn
Output for 7.1.0 - 7.3.0alpha1
DateInterval Object ( [y] => 0 [m] => 0 [d] => 4 [h] => 0 [i] => 0 [s] => 0 [f] => 0 [weekday] => 0 [weekday_behavior] => 0 [first_last_day_of] => 0 [invert] => 0 [days] => 4 [special_type] => 0 [special_amount] => 0 [have_weekday_relative] => 0 [have_special_relative] => 0 )
Output for 5.3.27 - 5.3.29, 5.4.17 - 7.0.20
DateInterval Object ( [y] => 0 [m] => 0 [d] => 4 [h] => 0 [i] => 0 [s] => 0 [weekday] => 0 [weekday_behavior] => 0 [first_last_day_of] => 0 [invert] => 0 [days] => 4 [special_type] => 0 [special_amount] => 0 [have_weekday_relative] => 0 [have_special_relative] => 0 )
Output for 5.3.22 - 5.3.26, 5.4.12 - 5.4.16
DateInterval Object ( [y] => 0 [m] => 0 [d] => 4 [h] => 0 [i] => 0 [s] => 0 [invert] => 0 [days] => 4 )