3v4l.org

run code in 300+ PHP versions simultaneously
<?php $today_day = 28; $day = date("d-m-Y", mktime(0,0,0,2, $today_day,date("Y"))); $firstday=$day; print_r(explode("-",$firstday)); echo "firstday=$firstday\n"; echo "m=".date("m", strtotime($firstday)) . " | Y=" . date("Y", strtotime($firstday))."\n"; echo $day ."\n"; $today_day++; $day = date("d-m-Y", mktime(0,0,0,date("m", strtotime($firstday)),$today_day,date("Y", strtotime($firstday)))); echo "m=".date("m", strtotime($firstday)) . " | Y=" . date("Y", strtotime($firstday))."\n"; echo $day ."\n"; $today_day++; $day = date("d-m-Y", mktime(0,0,0,date("m", strtotime($firstday)),$today_day,date("Y", strtotime($firstday)))); echo $day ."\n"; ?>
Output for 5.1.3 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [0] => 28 [1] => 02 [2] => 2014 ) firstday=28-02-2014 m=02 | Y=2014 28-02-2014 m=02 | Y=2014 01-03-2014 02-03-2014
Output for 5.1.0 - 5.1.2
Array ( [0] => 28 [1] => 02 [2] => 2014 ) firstday=28-02-2014 m=01 | Y=1970 28-02-2014 m=01 | Y=1970 29-01-1970 30-01-1970
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5
Array ( [0] => 28 [1] => 02 [2] => 2014 ) firstday=28-02-2014 m=08 | Y=2033 28-02-2014 m=08 | Y=2033 29-08-2033 30-08-2033

preferences:
336.27 ms | 402 KiB | 451 Q