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<?php $array = [ ["2" => 6, "5" => 1], ["2" => 1, "5" => 3], ]; var_export( array_reduce( $array, fn($result, $row) => array_reduce( array_keys($row), fn($res, $k) => isset($res[$k]) && $res[$k] >= $row[$k] ? $res : array_replace($res, [$k => $row[$k]]), $result ), [] ) );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/K1SYq
function name:  (null)
number of ops:  13
compiled vars:  !0 = $array, !1 = $res, !2 = $k
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    8     1        INIT_FCALL                                               'var_export'
    9     2        INIT_FCALL                                               'array_reduce'
   10     3        SEND_VAR                                                 !0
   11     4        DECLARE_LAMBDA_FUNCTION                          ~4      [0]
          5        BIND_LEXICAL                                             ~4, !1
          6        BIND_LEXICAL                                             ~4, !2
   17     7        SEND_VAL                                                 ~4
   18     8        SEND_VAL                                                 <array>
    9     9        DO_ICALL                                         $5      
   18    10        SEND_VAR                                                 $5
    8    11        DO_ICALL                                                 
   20    12      > RETURN                                                   1


Dynamic Functions:
Dynamic Function 0
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/K1SYq
function name:  {closure}
number of ops:  16
compiled vars:  !0 = $result, !1 = $row, !2 = $res, !3 = $k
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   11     0  E >   RECV                                             !0      
          1        RECV                                             !1      
          2        BIND_STATIC                                              !2
          3        BIND_STATIC                                              !3
          4        INIT_FCALL                                               'array_reduce'
   12     5        INIT_FCALL                                               'array_keys'
          6        SEND_VAR                                                 !1
          7        DO_ICALL                                         $4      
          8        SEND_VAR                                                 $4
   13     9        DECLARE_LAMBDA_FUNCTION                          ~5      [0]
         10        BIND_LEXICAL                                             ~5, !1
   15    11        SEND_VAL                                                 ~5
   16    12        SEND_VAR                                                 !0
   11    13        DO_ICALL                                         $6      
   16    14      > RETURN                                                   $6
   17    15*     > RETURN                                                   null


Dynamic Functions:
Dynamic Function 0
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 46) Position 1 = 5, Position 2 = 9
Branch analysis from position: 5
2 jumps found. (Code = 43) Position 1 = 10, Position 2 = 12
Branch analysis from position: 10
1 jumps found. (Code = 42) Position 1 = 19
Branch analysis from position: 19
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 12
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 9
filename:       /in/K1SYq
function name:  {closure}
number of ops:  21
compiled vars:  !0 = $res, !1 = $k, !2 = $row
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   13     0  E >   RECV                                             !0      
          1        RECV                                             !1      
          2        BIND_STATIC                                              !2
          3        ISSET_ISEMPTY_DIM_OBJ                         0  ~3      !0, !1
          4      > JMPZ_EX                                          ~3      ~3, ->9
          5    >   FETCH_DIM_R                                      ~4      !0, !1
          6        FETCH_DIM_R                                      ~5      !2, !1
          7        IS_SMALLER_OR_EQUAL                              ~6      ~5, ~4
          8        BOOL                                             ~3      ~6
          9    > > JMPZ                                                     ~3, ->12
   14    10    >   QM_ASSIGN                                        ~7      !0
         11      > JMP                                                      ->19
   15    12    >   INIT_FCALL                                               'array_replace'
         13        SEND_VAR                                                 !0
         14        FETCH_DIM_R                                      ~8      !2, !1
         15        INIT_ARRAY                                       ~9      ~8, !1
         16        SEND_VAL                                                 ~9
         17        DO_ICALL                                         $10     
         18        QM_ASSIGN                                        ~7      $10
         19    > > RETURN                                                   ~7
         20*     > RETURN                                                   null

End of Dynamic Function 0

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.0.0


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154.35 ms | 1008 KiB | 17 Q