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<?php $n = '2017-2-1'; $start = \DateTime::createFromFormat('Y-m-d', $n); $end = new \DateTime($n . ' 1 month - 1 second'); $b = new \DateTime('2017-1-12'); var_dump($start->format('Y.M.d')); var_dump($end->format('Y.M.d')); var_dump($end->diff($b));
based on q3sYj
Output for 7.1.0 - 7.3.0alpha1
string(11) "2017.Feb.01" string(11) "2017.Feb.28" object(DateInterval)#4 (16) { ["y"]=> int(0) ["m"]=> int(1) ["d"]=> int(16) ["h"]=> int(23) ["i"]=> int(59) ["s"]=> int(59) ["f"]=> float(0) ["weekday"]=> int(0) ["weekday_behavior"]=> int(0) ["first_last_day_of"]=> int(0) ["invert"]=> int(1) ["days"]=> int(47) ["special_type"]=> int(0) ["special_amount"]=> int(0) ["have_weekday_relative"]=> int(0) ["have_special_relative"]=> int(0) }
Output for 5.6.0 - 5.6.30, 7.0.0 - 7.0.20
string(11) "2017.Feb.01" string(11) "2017.Feb.28" object(DateInterval)#4 (15) { ["y"]=> int(0) ["m"]=> int(1) ["d"]=> int(16) ["h"]=> int(23) ["i"]=> int(59) ["s"]=> int(59) ["weekday"]=> int(0) ["weekday_behavior"]=> int(0) ["first_last_day_of"]=> int(0) ["invert"]=> int(1) ["days"]=> int(47) ["special_type"]=> int(0) ["special_amount"]=> int(0) ["have_weekday_relative"]=> int(0) ["have_special_relative"]=> int(0) }
Output for hhvm-3.15.4
string(11) "2017.Feb.01" string(11) "2017.Feb.28" object(DateInterval)#4 (0) { }