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<?php $array = array ( 0 => array ( 'company' => 1, 'product' => 5, ), 1 => array ( 'company' => 2, 'product' => 4, ), 2 => array ( 'company' => 6, 'product' => 5, ), 3 => array ( 'company' => 2, 'product' => 3, ), ); foreach ($array as $set) { if (!isset($result[$set['product']])) { $result[$set['product']] = $set; } else { $result[$set['product']]['company'] .= ",{$set['company']}"; } } var_export(array_values($result));
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 2, Position 2 = 19
Branch analysis from position: 2
2 jumps found. (Code = 78) Position 1 = 3, Position 2 = 19
Branch analysis from position: 3
2 jumps found. (Code = 43) Position 1 = 7, Position 2 = 11
Branch analysis from position: 7
1 jumps found. (Code = 42) Position 1 = 18
Branch analysis from position: 18
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 11
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 19
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 19
filename:       /in/X718h
function name:  (null)
number of ops:  27
compiled vars:  !0 = $array, !1 = $set, !2 = $result
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
   26     1      > FE_RESET_R                                           $4      !0, ->19
          2    > > FE_FETCH_R                                                   $4, !1, ->19
   27     3    >   FETCH_DIM_R                                          ~5      !1, 'product'
          4        ISSET_ISEMPTY_DIM_OBJ                             0  ~6      !2, ~5
          5        BOOL_NOT                                             ~7      ~6
          6      > JMPZ                                                         ~7, ->11
   28     7    >   FETCH_DIM_R                                          ~8      !1, 'product'
          8        ASSIGN_DIM                                                   !2, ~8
          9        OP_DATA                                                      !1
   27    10      > JMP                                                          ->18
   30    11    >   FETCH_DIM_R                                          ~10     !1, 'product'
         12        NOP                                                          
         13        FETCH_DIM_R                                          ~13     !1, 'company'
         14        FAST_CONCAT                                          ~14     '%2C', ~13
         15        FETCH_DIM_RW                                         $11     !2, ~10
         16        ASSIGN_DIM_OP                    .=               8          $11, 'company'
         17        OP_DATA                                                      ~14
   26    18    > > JMP                                                          ->2
         19    >   FE_FREE                                                      $4
   33    20        INIT_FCALL                                                   'var_export'
         21        INIT_FCALL                                                   'array_values'
         22        SEND_VAR                                                     !2
         23        DO_ICALL                                             $15     
         24        SEND_VAR                                                     $15
         25        DO_ICALL                                                     
         26      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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