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<?php $array = [ ["2" => 6, "5" => 1], ["2" => 1, "5" => 3], ]; $result = []; foreach ($array as $row) { foreach ($row as $k => $v) { if (!isset($result[$k]) || $result[$k] < $v){ $result[$k] = $v; } } } var_export($result);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 3, Position 2 = 19
Branch analysis from position: 3
2 jumps found. (Code = 78) Position 1 = 4, Position 2 = 19
Branch analysis from position: 4
2 jumps found. (Code = 77) Position 1 = 5, Position 2 = 17
Branch analysis from position: 5
2 jumps found. (Code = 78) Position 1 = 6, Position 2 = 17
Branch analysis from position: 6
2 jumps found. (Code = 47) Position 1 = 10, Position 2 = 13
Branch analysis from position: 10
2 jumps found. (Code = 43) Position 1 = 14, Position 2 = 16
Branch analysis from position: 14
1 jumps found. (Code = 42) Position 1 = 5
Branch analysis from position: 5
Branch analysis from position: 16
Branch analysis from position: 13
Branch analysis from position: 17
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 17
Branch analysis from position: 19
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 19
filename:       /in/6NqYK
function name:  (null)
number of ops:  24
compiled vars:  !0 = $array, !1 = $result, !2 = $row, !3 = $v, !4 = $k
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    8     1        ASSIGN                                                   !1, <array>
    9     2      > FE_RESET_R                                       $7      !0, ->19
          3    > > FE_FETCH_R                                               $7, !2, ->19
   10     4    > > FE_RESET_R                                       $8      !2, ->17
          5    > > FE_FETCH_R                                       ~9      $8, !3, ->17
          6    >   ASSIGN                                                   !4, ~9
   11     7        ISSET_ISEMPTY_DIM_OBJ                         0  ~11     !1, !4
          8        BOOL_NOT                                         ~12     ~11
          9      > JMPNZ_EX                                         ~12     ~12, ->13
         10    >   FETCH_DIM_R                                      ~13     !1, !4
         11        IS_SMALLER                                       ~14     ~13, !3
         12        BOOL                                             ~12     ~14
         13    > > JMPZ                                                     ~12, ->16
   12    14    >   ASSIGN_DIM                                               !1, !4
         15        OP_DATA                                                  !3
   10    16    > > JMP                                                      ->5
         17    >   FE_FREE                                                  $8
    9    18      > JMP                                                      ->3
         19    >   FE_FREE                                                  $7
   16    20        INIT_FCALL                                               'var_export'
         21        SEND_VAR                                                 !1
         22        DO_ICALL                                                 
         23      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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