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<?php $ids = [1, 2, 2, 3]; $vals = [10, 20, 30, 50]; foreach ($ids as $index => $id) { if (!isset($result[$id])) { $result[$id] = $vals[$index]; } else { $result[$id] += $vals[$index]; } } var_export($result);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 3, Position 2 = 16
Branch analysis from position: 3
2 jumps found. (Code = 78) Position 1 = 4, Position 2 = 16
Branch analysis from position: 4
2 jumps found. (Code = 43) Position 1 = 8, Position 2 = 12
Branch analysis from position: 8
1 jumps found. (Code = 42) Position 1 = 15
Branch analysis from position: 15
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 12
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 16
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 16
filename:       /in/fjINV
function name:  (null)
number of ops:  21
compiled vars:  !0 = $ids, !1 = $vals, !2 = $id, !3 = $index, !4 = $result
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        ASSIGN                                                   !1, <array>
    6     2      > FE_RESET_R                                       $7      !0, ->16
          3    > > FE_FETCH_R                                       ~8      $7, !2, ->16
          4    >   ASSIGN                                                   !3, ~8
    7     5        ISSET_ISEMPTY_DIM_OBJ                         0  ~10     !4, !2
          6        BOOL_NOT                                         ~11     ~10
          7      > JMPZ                                                     ~11, ->12
    8     8    >   FETCH_DIM_R                                      ~13     !1, !3
          9        ASSIGN_DIM                                               !4, !2
         10        OP_DATA                                                  ~13
    7    11      > JMP                                                      ->15
   10    12    >   FETCH_DIM_R                                      ~15     !1, !3
         13        ASSIGN_DIM_OP                +=               1          !4, !2
         14        OP_DATA                                                  ~15
    6    15    > > JMP                                                      ->3
         16    >   FE_FREE                                                  $7
   13    17        INIT_FCALL                                               'var_export'
         18        SEND_VAR                                                 !4
         19        DO_ICALL                                                 
         20      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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