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<?php $start = new DateTime('2010-12-02'); $start->modify('first day of this month'); $end = clone $start; $end->modify('-1 year'); $end->modify('first day of next month'); $interval = DateInterval::createFromDateString('1 month'); $period = new DatePeriod($start, $interval, $end); foreach ($period as $dt) { echo $dt->format("Y-m") . PHP_EOL; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 26, Position 2 = 33
Branch analysis from position: 26
2 jumps found. (Code = 78) Position 1 = 27, Position 2 = 33
Branch analysis from position: 27
1 jumps found. (Code = 42) Position 1 = 26
Branch analysis from position: 26
Branch analysis from position: 33
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 33
filename:       /in/Ssk64
function name:  (null)
number of ops:  35
compiled vars:  !0 = $start, !1 = $end, !2 = $interval, !3 = $period, !4 = $dt
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   NEW                                              $5      'DateTime'
          1        SEND_VAL_EX                                              '2010-12-02'
          2        DO_FCALL                                      0          
          3        ASSIGN                                                   !0, $5
    3     4        INIT_METHOD_CALL                                         !0, 'modify'
          5        SEND_VAL_EX                                              'first+day+of+this+month'
          6        DO_FCALL                                      0          
    4     7        CLONE                                            ~9      !0
          8        ASSIGN                                                   !1, ~9
    5     9        INIT_METHOD_CALL                                         !1, 'modify'
         10        SEND_VAL_EX                                              '-1+year'
         11        DO_FCALL                                      0          
    6    12        INIT_METHOD_CALL                                         !1, 'modify'
         13        SEND_VAL_EX                                              'first+day+of+next+month'
         14        DO_FCALL                                      0          
    7    15        INIT_STATIC_METHOD_CALL                                  'DateInterval', 'createFromDateString'
         16        SEND_VAL                                                 '1+month'
         17        DO_FCALL                                      0  $13     
         18        ASSIGN                                                   !2, $13
    8    19        NEW                                              $15     'DatePeriod'
         20        SEND_VAR_EX                                              !0
         21        SEND_VAR_EX                                              !2
         22        SEND_VAR_EX                                              !1
         23        DO_FCALL                                      0          
         24        ASSIGN                                                   !3, $15
   10    25      > FE_RESET_R                                       $18     !3, ->33
         26    > > FE_FETCH_R                                               $18, !4, ->33
   11    27    >   INIT_METHOD_CALL                                         !4, 'format'
         28        SEND_VAL_EX                                              'Y-m'
         29        DO_FCALL                                      0  $19     
         30        CONCAT                                           ~20     $19, '%0A'
         31        ECHO                                                     ~20
   10    32      > JMP                                                      ->26
         33    >   FE_FREE                                                  $18
   12    34      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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