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<?php $array = range(1, 3); $result = []; foreach ($array as $shifter => $unused) { foreach ($array as $index => $value) { $key = $shifter + $index; $result[$key] = ($result[$key] ?? 0) + $value; } } var_export($result);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 7, Position 2 = 23
Branch analysis from position: 7
2 jumps found. (Code = 78) Position 1 = 8, Position 2 = 23
Branch analysis from position: 8
2 jumps found. (Code = 77) Position 1 = 10, Position 2 = 21
Branch analysis from position: 10
2 jumps found. (Code = 78) Position 1 = 11, Position 2 = 21
Branch analysis from position: 11
1 jumps found. (Code = 42) Position 1 = 10
Branch analysis from position: 10
Branch analysis from position: 21
1 jumps found. (Code = 42) Position 1 = 7
Branch analysis from position: 7
Branch analysis from position: 21
Branch analysis from position: 23
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 23
filename:       /in/tOqWm
function name:  (null)
number of ops:  28
compiled vars:  !0 = $array, !1 = $result, !2 = $unused, !3 = $shifter, !4 = $value, !5 = $index, !6 = $key
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                                   'range'
          1        SEND_VAL                                                     1
          2        SEND_VAL                                                     3
          3        DO_ICALL                                             $7      
          4        ASSIGN                                                       !0, $7
    4     5        ASSIGN                                                       !1, <array>
    5     6      > FE_RESET_R                                           $10     !0, ->23
          7    > > FE_FETCH_R                                           ~11     $10, !2, ->23
          8    >   ASSIGN                                                       !3, ~11
    6     9      > FE_RESET_R                                           $13     !0, ->21
         10    > > FE_FETCH_R                                           ~14     $13, !4, ->21
         11    >   ASSIGN                                                       !5, ~14
    7    12        ADD                                                  ~16     !3, !5
         13        ASSIGN                                                       !6, ~16
    8    14        FETCH_DIM_IS                                         ~19     !1, !6
         15        COALESCE                                             ~20     ~19
         16        QM_ASSIGN                                            ~20     0
         17        ADD                                                  ~21     ~20, !4
         18        ASSIGN_DIM                                                   !1, !6
         19        OP_DATA                                                      ~21
    6    20      > JMP                                                          ->10
         21    >   FE_FREE                                                      $13
    5    22      > JMP                                                          ->7
         23    >   FE_FREE                                                      $10
   11    24        INIT_FCALL                                                   'var_export'
         25        SEND_VAR                                                     !1
         26        DO_ICALL                                                     
         27      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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