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run code in 150+ php & hhvm versions
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<?php $day1 = new DateTime( '2010-03-30' ); $day1->modify( '+1 month' ); $day1nextmonth=$day1->format( 'm' ); $day1result=$day1->format( 'd-m-Y' ); $day2 = new DateTime( '2010-03-30' ); $day2->modify( 'last day of next month' ); $day2nextmonth=$day2->format( 'm' ); $day2result=$day2->format( 'd-m-Y' ); echo "1st-".$day1result, "\n"; echo "2nd-".$day2result, "\n"; echo "1stnext month-".$day1nextmonth, "\n"; echo "2ndnext month-".$day2nextmonth, "\n"; $result=($day1nextmonth == $day2nextmonth)?$day1result:$day2result; echo $result;
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
1st-30-04-2010 2nd-30-04-2010 1stnext month-04 2ndnext month-04 30-04-2010
Output for 5.2.13 - 5.2.17
Warning: DateTime::modify(): Failed to parse time string (last day of next month) at position 9 (o): The timezone could not be found in the database in /in/lFt3Y on line 8 1st-30-04-2010 2nd-30-03-2010 1stnext month-04 2ndnext month-03 30-03-2010
Output for 5.2.0 - 5.2.12
1st-30-04-2010 2nd-29-04-2010 1stnext month-04 2ndnext month-04 30-04-2010
Output for 5.0.0 - 5.1.6
Fatal error: Class 'DateTime' not found in /in/lFt3Y on line 2
Process exited with code 255.
Output for 4.3.2 - 4.4.9
Fatal error: Cannot instantiate non-existent class: datetime in /in/lFt3Y on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Cannot instantiate non-existent class: datetime in /in/lFt3Y on line 2