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<?php $x = new DateTimeImmutable('2015-07-31'); $y = $x->modify('first day of previous month'); var_dump($y); $z = $y->setDate($y->format('Y'), $y->format('n')-1,30); var_dump($z);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/kBJ0a
function name:  (null)
number of ops:  28
compiled vars:  !0 = $x, !1 = $y, !2 = $z
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   NEW                                              $3      'DateTimeImmutable'
          1        SEND_VAL_EX                                              '2015-07-31'
          2        DO_FCALL                                      0          
          3        ASSIGN                                                   !0, $3
    5     4        INIT_METHOD_CALL                                         !0, 'modify'
          5        SEND_VAL_EX                                              'first+day+of+previous+month'
          6        DO_FCALL                                      0  $6      
          7        ASSIGN                                                   !1, $6
    6     8        INIT_FCALL                                               'var_dump'
          9        SEND_VAR                                                 !1
         10        DO_ICALL                                                 
    7    11        INIT_METHOD_CALL                                         !1, 'setDate'
         12        INIT_METHOD_CALL                                         !1, 'format'
         13        SEND_VAL_EX                                              'Y'
         14        DO_FCALL                                      0  $9      
         15        SEND_VAR_NO_REF_EX                                       $9
         16        INIT_METHOD_CALL                                         !1, 'format'
         17        SEND_VAL_EX                                              'n'
         18        DO_FCALL                                      0  $10     
         19        SUB                                              ~11     $10, 1
         20        SEND_VAL_EX                                              ~11
         21        SEND_VAL_EX                                              30
         22        DO_FCALL                                      0  $12     
         23        ASSIGN                                                   !2, $12
    8    24        INIT_FCALL                                               'var_dump'
         25        SEND_VAR                                                 !2
         26        DO_ICALL                                                 
         27      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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