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<?php $data = [ ['alteration1', 'alteration4',], ['alteration2','alteration3'], ['alteration2','alteration3'], [] ]; $combinations = [[]]; foreach($data as $index => $current_data){ $current_data = array_unique($current_data); $temp_combinations = []; foreach($current_data as $value){ foreach($combinations as $each_combination){ $temp_combinations[] = array_merge($each_combination,[$value]); } } $combinations = $temp_combinations; } $set = []; $unique_combinations = []; foreach($combinations as $each_combination){ natsort($each_combination); $serialized_form = implode(",",$each_combination); if(isset($set[$serialized_form])) continue; if(empty($each_combination)) continue; $unique_combinations[] = $each_combination; $set[$serialized_form] = true; } print_r($unique_combinations);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 3, Position 2 = 27
Branch analysis from position: 3
2 jumps found. (Code = 78) Position 1 = 4, Position 2 = 27
Branch analysis from position: 4
2 jumps found. (Code = 77) Position 1 = 11, Position 2 = 24
Branch analysis from position: 11
2 jumps found. (Code = 78) Position 1 = 12, Position 2 = 24
Branch analysis from position: 12
2 jumps found. (Code = 77) Position 1 = 13, Position 2 = 22
Branch analysis from position: 13
2 jumps found. (Code = 78) Position 1 = 14, Position 2 = 22
Branch analysis from position: 14
1 jumps found. (Code = 42) Position 1 = 13
Branch analysis from position: 13
Branch analysis from position: 22
1 jumps found. (Code = 42) Position 1 = 11
Branch analysis from position: 11
Branch analysis from position: 22
Branch analysis from position: 24
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 24
Branch analysis from position: 27
2 jumps found. (Code = 77) Position 1 = 31, Position 2 = 51
Branch analysis from position: 31
2 jumps found. (Code = 78) Position 1 = 32, Position 2 = 51
Branch analysis from position: 32
2 jumps found. (Code = 43) Position 1 = 42, Position 2 = 43
Branch analysis from position: 42
1 jumps found. (Code = 42) Position 1 = 31
Branch analysis from position: 31
Branch analysis from position: 43
2 jumps found. (Code = 43) Position 1 = 45, Position 2 = 46
Branch analysis from position: 45
1 jumps found. (Code = 42) Position 1 = 31
Branch analysis from position: 31
Branch analysis from position: 46
1 jumps found. (Code = 42) Position 1 = 31
Branch analysis from position: 31
Branch analysis from position: 51
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 51
Branch analysis from position: 27
filename:       /in/F8NNH
function name:  (null)
number of ops:  56
compiled vars:  !0 = $data, !1 = $combinations, !2 = $current_data, !3 = $index, !4 = $temp_combinations, !5 = $value, !6 = $each_combination, !7 = $set, !8 = $unique_combinations, !9 = $serialized_form
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
   11     1        ASSIGN                                                   !1, <array>
   13     2      > FE_RESET_R                                       $12     !0, ->27
          3    > > FE_FETCH_R                                       ~13     $12, !2, ->27
          4    >   ASSIGN                                                   !3, ~13
   14     5        INIT_FCALL                                               'array_unique'
          6        SEND_VAR                                                 !2
          7        DO_ICALL                                         $15     
          8        ASSIGN                                                   !2, $15
   15     9        ASSIGN                                                   !4, <array>
   16    10      > FE_RESET_R                                       $18     !2, ->24
         11    > > FE_FETCH_R                                               $18, !5, ->24
   17    12    > > FE_RESET_R                                       $19     !1, ->22
         13    > > FE_FETCH_R                                               $19, !6, ->22
   18    14    >   INIT_FCALL                                               'array_merge'
         15        SEND_VAR                                                 !6
         16        INIT_ARRAY                                       ~21     !5
         17        SEND_VAL                                                 ~21
         18        DO_ICALL                                         $22     
         19        ASSIGN_DIM                                               !4
         20        OP_DATA                                                  $22
   17    21      > JMP                                                      ->13
         22    >   FE_FREE                                                  $19
   16    23      > JMP                                                      ->11
         24    >   FE_FREE                                                  $18
   22    25        ASSIGN                                                   !1, !4
   13    26      > JMP                                                      ->3
         27    >   FE_FREE                                                  $12
   25    28        ASSIGN                                                   !7, <array>
   26    29        ASSIGN                                                   !8, <array>
   28    30      > FE_RESET_R                                       $26     !1, ->51
         31    > > FE_FETCH_R                                               $26, !6, ->51
   29    32    >   INIT_FCALL                                               'natsort'
         33        SEND_REF                                                 !6
         34        DO_ICALL                                                 
   30    35        INIT_FCALL                                               'implode'
         36        SEND_VAL                                                 '%2C'
         37        SEND_VAR                                                 !6
         38        DO_ICALL                                         $28     
         39        ASSIGN                                                   !9, $28
   31    40        ISSET_ISEMPTY_DIM_OBJ                         0          !7, !9
         41      > JMPZ                                                     ~30, ->43
         42    > > JMP                                                      ->31
   32    43    >   ISSET_ISEMPTY_CV                                         !6
         44      > JMPZ                                                     ~31, ->46
         45    > > JMP                                                      ->31
   33    46    >   ASSIGN_DIM                                               !8
         47        OP_DATA                                                  !6
   34    48        ASSIGN_DIM                                               !7, !9
         49        OP_DATA                                                  <true>
   28    50      > JMP                                                      ->31
         51    >   FE_FREE                                                  $26
   37    52        INIT_FCALL                                               'print_r'
         53        SEND_VAR                                                 !8
         54        DO_ICALL                                                 
         55      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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