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<?php $array = [ ['task_id' => 1, 'name' => 'do dishes', 'user' => 'bob'], ['task_id' => 1, 'name' => 'do dishes', 'user' => 'liam'], ['task_id' => 2, 'name' => 'vacuum', 'user' => 'liam'], ['task_id' => 3, 'name' => 'Take out thrash', 'user' => 'liam'], ['task_id' => 3, 'name' => 'Take out thrash', 'user' => 'bob'], ]; $result = []; foreach ($array as $row) { extract($row); if (!isset($ref[$task_id])) { $ref[$task_id] = ['task_id' => $task_id, 'name' => $name, 'users' => []]; $result[] =& $ref[$task_id]; } $ref[$task_id]['users'][] = $user; } var_export($result);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 3, Position 2 = 24
Branch analysis from position: 3
2 jumps found. (Code = 78) Position 1 = 4, Position 2 = 24
Branch analysis from position: 4
2 jumps found. (Code = 43) Position 1 = 10, Position 2 = 19
Branch analysis from position: 10
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 19
Branch analysis from position: 24
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 24
filename:       /in/P9duh
function name:  (null)
number of ops:  29
compiled vars:  !0 = $array, !1 = $result, !2 = $row, !3 = $ref, !4 = $task_id, !5 = $name, !6 = $user
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                                       $9      !0, ->24
          3    > > FE_FETCH_R                                               $9, !2, ->24
   13     4    >   INIT_FCALL                                               'extract'
          5        SEND_REF                                                 !2
          6        DO_ICALL                                                 
   14     7        ISSET_ISEMPTY_DIM_OBJ                         0  ~11     !3, !4
          8        BOOL_NOT                                         ~12     ~11
          9      > JMPZ                                                     ~12, ->19
   15    10    >   INIT_ARRAY                                       ~14     !4, 'task_id'
         11        ADD_ARRAY_ELEMENT                                ~14     !5, 'name'
         12        ADD_ARRAY_ELEMENT                                ~14     <array>, 'users'
         13        ASSIGN_DIM                                               !3, !4
         14        OP_DATA                                                  ~14
   16    15        FETCH_DIM_W                                      $16     !3, !4
         16        MAKE_REF                                         $17     $16
         17        FETCH_DIM_W                                      $15     !1
         18        ASSIGN_REF                                               $15, $17
   18    19    >   FETCH_DIM_W                                      $19     !3, !4
         20        FETCH_DIM_W                                      $20     $19, 'users'
         21        ASSIGN_DIM                                               $20
         22        OP_DATA                                                  !6
   12    23      > JMP                                                      ->3
         24    >   FE_FREE                                                  $9
   20    25        INIT_FCALL                                               'var_export'
         26        SEND_VAR                                                 !1
         27        DO_ICALL                                                 
         28      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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