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<?php $date1 = new DateTime('2017-03-01', new DateTimeZone('UTC')); $date2 = new DateTime('2017-04-01', new DateTimeZone('UTC')); $diff = $date1->diff($date2); echo "{$diff->m} months and {$diff->d} days.";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/uoioc
function name:  (null)
number of ops:  28
compiled vars:  !0 = $date1, !1 = $date2, !2 = $diff
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   NEW                                              $3      'DateTime'
          1        SEND_VAL_EX                                              '2017-03-01'
          2        NEW                                              $4      'DateTimeZone'
          3        SEND_VAL_EX                                              'UTC'
          4        DO_FCALL                                      0          
          5        SEND_VAR_NO_REF_EX                                       $4
          6        DO_FCALL                                      0          
          7        ASSIGN                                                   !0, $3
    4     8        NEW                                              $8      'DateTime'
          9        SEND_VAL_EX                                              '2017-04-01'
         10        NEW                                              $9      'DateTimeZone'
         11        SEND_VAL_EX                                              'UTC'
         12        DO_FCALL                                      0          
         13        SEND_VAR_NO_REF_EX                                       $9
         14        DO_FCALL                                      0          
         15        ASSIGN                                                   !1, $8
    6    16        INIT_METHOD_CALL                                         !0, 'diff'
         17        SEND_VAR_EX                                              !1
         18        DO_FCALL                                      0  $13     
         19        ASSIGN                                                   !2, $13
    8    20        FETCH_OBJ_R                                      ~15     !2, 'm'
         21        ROPE_INIT                                     4  ~18     ~15
         22        ROPE_ADD                                      1  ~18     ~18, '+months+and+'
         23        FETCH_OBJ_R                                      ~16     !2, 'd'
         24        ROPE_ADD                                      2  ~18     ~18, ~16
         25        ROPE_END                                      3  ~17     ~18, '+days.'
         26        ECHO                                                     ~17
         27      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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