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<?php $array = [ [ 'product' => [ 'value' => 'basic', 'label' => 'Basic' ], 'countries' => [ 'Japan', // these 'Korea' // two... ], ], [ 'product' => [ 'value' => 'pro', 'label' => 'Pro' ], 'countries' => [ 'Japan', // ...and these two 'Korea' // are identical... ], ], [ 'product' => [ 'value' => 'expert', 'label' => 'Expert' ], 'countries' => [ 'Japan', 'France' ], ] ]; $result = []; foreach ($array as $row) { sort($row['countries']); $compositeKey = implode('_', $row['countries']); if (!isset($result[$compositeKey])) { $result[$compositeKey] = $row; } elseif (isset($result[$compositeKey]['product']['value'])) { $result[$compositeKey]['product'] = [ $result[$compositeKey]['product'], $row['product'] ]; } else { $result[$compositeKey]['product'][] = $row['product']; } } echo json_encode(array_values($result), JSON_PRETTY_PRINT);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 3, Position 2 = 36
Branch analysis from position: 3
2 jumps found. (Code = 78) Position 1 = 4, Position 2 = 36
Branch analysis from position: 4
2 jumps found. (Code = 43) Position 1 = 14, Position 2 = 17
Branch analysis from position: 14
1 jumps found. (Code = 42) Position 1 = 35
Branch analysis from position: 35
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 17
2 jumps found. (Code = 43) Position 1 = 21, Position 2 = 30
Branch analysis from position: 21
1 jumps found. (Code = 42) Position 1 = 35
Branch analysis from position: 35
Branch analysis from position: 30
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 36
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 36
filename:       /in/5TLSe
function name:  (null)
number of ops:  46
compiled vars:  !0 = $array, !1 = $result, !2 = $row, !3 = $compositeKey
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
   37     1        ASSIGN                                                       !1, <array>
   38     2      > FE_RESET_R                                           $6      !0, ->36
          3    > > FE_FETCH_R                                                   $6, !2, ->36
   39     4    >   INIT_FCALL                                                   'sort'
          5        FETCH_DIM_W                                          $7      !2, 'countries'
          6        SEND_REF                                                     $7
          7        DO_ICALL                                                     
   40     8        FETCH_DIM_R                                          ~9      !2, 'countries'
          9        FRAMELESS_ICALL_2                implode             ~10     '_', ~9
         10        ASSIGN                                                       !3, ~10
   41    11        ISSET_ISEMPTY_DIM_OBJ                             0  ~12     !1, !3
         12        BOOL_NOT                                             ~13     ~12
         13      > JMPZ                                                         ~13, ->17
   42    14    >   ASSIGN_DIM                                                   !1, !3
         15        OP_DATA                                                      !2
   41    16      > JMP                                                          ->35
   43    17    >   FETCH_DIM_IS                                         ~15     !1, !3
         18        FETCH_DIM_IS                                         ~16     ~15, 'product'
         19        ISSET_ISEMPTY_DIM_OBJ                             0          ~16, 'value'
         20      > JMPZ                                                         ~17, ->30
   45    21    >   FETCH_DIM_R                                          ~20     !1, !3
         22        FETCH_DIM_R                                          ~21     ~20, 'product'
         23        INIT_ARRAY                                           ~22     ~21
   46    24        FETCH_DIM_R                                          ~23     !2, 'product'
         25        ADD_ARRAY_ELEMENT                                    ~22     ~23
   44    26        FETCH_DIM_W                                          $18     !1, !3
         27        ASSIGN_DIM                                                   $18, 'product'
   46    28        OP_DATA                                                      ~22
   43    29      > JMP                                                          ->35
   49    30    >   FETCH_DIM_R                                          ~27     !2, 'product'
         31        FETCH_DIM_W                                          $24     !1, !3
         32        FETCH_DIM_W                                          $25     $24, 'product'
         33        ASSIGN_DIM                                                   $25
         34        OP_DATA                                                      ~27
   38    35    > > JMP                                                          ->3
         36    >   FE_FREE                                                      $6
   52    37        INIT_FCALL                                                   'json_encode'
         38        INIT_FCALL                                                   'array_values'
         39        SEND_VAR                                                     !1
         40        DO_ICALL                                             $28     
         41        SEND_VAR                                                     $28
         42        SEND_VAL                                                     128
         43        DO_ICALL                                             $29     
         44        ECHO                                                         $29
         45      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


preferences:
155.82 ms | 1996 KiB | 16 Q