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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
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
   11     1        ASSIGN                                                       !1, <array>
   12     2      > FE_RESET_R                                           $7      !0, ->35
          3    > > FE_FETCH_R                                                   $7, !2, ->35
   13     4    >   ASSIGN_REF                                                   !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_NOT                                             ~11     ~10
          9      > JMPZ                                                         ~11, ->12
         10    >   ASSIGN_DIM                                                   !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_NOT                                             ~16     ~15
         16      > JMPZ                                                         ~16, ->21
         17    >   FETCH_DIM_R                                          ~18     !2, !4
         18        FETCH_DIM_W                                          $17     !3, !4
         19        ASSIGN_DIM                                                   $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_REF                                                   !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_DIM                                                   !3
         32        OP_DATA                                                      ~26
   20    33        UNSET_CV                                                     !3
   12    34      > JMP                                                          ->3
         35    >   FE_FREE                                                      $7
   23    36        INIT_FCALL                                                   'json_encode'
         37        SEND_VAR                                                     !1
         38        DO_ICALL                                             $28     
         39        ECHO                                                         $28
         40      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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