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<?php $tz=new DateTimeZone('UTC'); $date = new DateTime('2000-12-31', $tz); $date->add(new DateInterval('P1M', $tz)); var_dump($date->format('Y-m-d')); $date->add(new DateInterval('P1M', $tz)); var_dump($date->format('Y-m-d'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/XqL9Z
function name:  (null)
number of ops:  36
compiled vars:  !0 = $tz, !1 = $date
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   NEW                                              $2      'DateTimeZone'
          1        SEND_VAL_EX                                              'UTC'
          2        DO_FCALL                                      0          
          3        ASSIGN                                                   !0, $2
    5     4        NEW                                              $5      'DateTime'
          5        SEND_VAL_EX                                              '2000-12-31'
          6        SEND_VAR_EX                                              !0
          7        DO_FCALL                                      0          
          8        ASSIGN                                                   !1, $5
    6     9        INIT_METHOD_CALL                                         !1, 'add'
         10        NEW                                              $8      'DateInterval'
         11        SEND_VAL_EX                                              'P1M'
         12        SEND_VAR_EX                                              !0
         13        DO_FCALL                                      0          
         14        SEND_VAR_NO_REF_EX                                       $8
         15        DO_FCALL                                      0          
    7    16        INIT_FCALL                                               'var_dump'
         17        INIT_METHOD_CALL                                         !1, 'format'
         18        SEND_VAL_EX                                              'Y-m-d'
         19        DO_FCALL                                      0  $11     
         20        SEND_VAR                                                 $11
         21        DO_ICALL                                                 
    9    22        INIT_METHOD_CALL                                         !1, 'add'
         23        NEW                                              $13     'DateInterval'
         24        SEND_VAL_EX                                              'P1M'
         25        SEND_VAR_EX                                              !0
         26        DO_FCALL                                      0          
         27        SEND_VAR_NO_REF_EX                                       $13
         28        DO_FCALL                                      0          
   10    29        INIT_FCALL                                               'var_dump'
         30        INIT_METHOD_CALL                                         !1, 'format'
         31        SEND_VAL_EX                                              'Y-m-d'
         32        DO_FCALL                                      0  $16     
         33        SEND_VAR                                                 $16
         34        DO_ICALL                                                 
         35      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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