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<?php $rows = [ ['cat' => 'guest', 'name' => 'name_one', 'y' => '2016', 'q' => '2', 'st' => 1], ['cat' => 'guest', 'name' => 'name_one', 'y' => '2017', 'q' => '3', 'st' => 2], ['cat' => 'guest', 'name' => 'name_two', 'y' => '2017', 'q' => '1', 'st' => 1], ['cat' => 'guest', 'name' => 'name_two', 'y' => '2017', 'q' => '2', 'st' => 2], ]; $data = []; foreach ($rows as $row) { $link = &$data; foreach (['cat', 'name', 'y'] as $field) { if (!isset($link[$field])) $link[$field] = []; if (!isset($link[$field][$row[$field]])) $link[$field][$row[$field]] = []; $link = &$link[$field][$row[$field]]; } $link[] = ['q' => $row['q'], 'st' => $row['st']]; unset($link); } echo json_encode($data);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 3, Position 2 = 35
Branch analysis from position: 3
2 jumps found. (Code = 78) Position 1 = 4, Position 2 = 35
Branch analysis from position: 4
2 jumps found. (Code = 77) Position 1 = 6, Position 2 = 26
Branch analysis from position: 6
2 jumps found. (Code = 78) Position 1 = 7, Position 2 = 26
Branch analysis from position: 7
2 jumps found. (Code = 43) Position 1 = 10, Position 2 = 12
Branch analysis from position: 10
2 jumps found. (Code = 43) Position 1 = 17, Position 2 = 21
Branch analysis from position: 17
1 jumps found. (Code = 42) Position 1 = 6
Branch analysis from position: 6
Branch analysis from position: 21
Branch analysis from position: 12
Branch analysis from position: 26
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 26
Branch analysis from position: 35
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 35
filename:       /in/dUBK4
function name:  (null)
number of ops:  41
compiled vars:  !0 = $rows, !1 = $data, !2 = $row, !3 = $link, !4 = $field
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   4     0  E >   QM_ASSIGN                                                !0
  11     1        QM_ASSIGN                                                !1
  12     2      > FE_RESET_R                                       $7      !0, ->35
         3    > > FE_FETCH_R                                               $7, !2, ->35
  13     4    >   ASSIGN_CONCAT                                 0          !3, !1
  14     5      > FE_RESET_R                                       $9      <array>, ->26
         6    > > FE_FETCH_R                                               $9, !4, ->26
  15     7    >   ISSET_ISEMPTY_DIM_OBJ                         0  ~10     !3, !4
         8        BOOL_XOR                                         ~11     ~10
         9      > JMPZ                                                     ~11, ->12
        10    >   ASSIGN_ADD                                    0          !3, !4
        11        OP_DATA                                                  <array>
  16    12    >   FETCH_DIM_R                                      ~14     !2, !4
        13        FETCH_DIM_IS                                     ~13     !3, !4
        14        ISSET_ISEMPTY_DIM_OBJ                         0  ~15     ~13, ~14
        15        BOOL_XOR                                         ~16     ~15
        16      > JMPZ                                                     ~16, ->21
        17    >   FETCH_DIM_R                                      ~18     !2, !4
        18        FETCH_DIM_W                                      $17     !3, !4
        19        ASSIGN_ADD                                    0          $17, ~18
        20        OP_DATA                                                  <array>
  17    21    >   FETCH_DIM_R                                      ~21     !2, !4
        22        FETCH_DIM_W                                      $20     !3, !4
        23        FETCH_DIM_W                                      $22     $20, ~21
        24        ASSIGN_CONCAT                                 0          !3, $22
  14    25      > JMP                                                      ->6
        26    >   FE_FREE                                                  $9
  19    27        FETCH_DIM_R                                      ~25     !2, 'q'
        28        INIT_ARRAY                                       ~26     ~25, 'q'
        29        FETCH_DIM_R                                      ~27     !2, 'st'
        30        ADD_ARRAY_ELEMENT                                ~26     ~27, 'st'
        31        ASSIGN_ADD                                    0          !3
        32        OP_DATA                                                  ~26
  20    33        DECLARE_LAMBDA_FUNCTION                                  !3
  12    34      > JMP                                                      ->3
        35    >   FE_FREE                                                  $7
  23    36        INIT_FCALL                                               'json_encode'
        37        SEND_VAR                                                 !1
        38        DO_ICALL                                         $28     
        39        ASSIGN_OBJ                                               $28
        40      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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