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<?php $arr = array(array( "2"=> 6, "5"=> 1 ), array( "2"=> 1, "5"=> 3 )); $arr = []; $keys = array_keys(reset($arr) ?: []); $res = array_combine( $keys, array_map( fn ($k) => max(array_column($arr, $k)), $keys) ); print_r($res);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/v3efA
function name:  (null)
number of ops:  26
compiled vars:  !0 = $arr, !1 = $keys, !2 = $res
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
   12     1        ASSIGN                                                       !0, <array>
   13     2        INIT_FCALL                                                   'array_keys'
          3        INIT_FCALL                                                   'reset'
          4        SEND_REF                                                     !0
          5        DO_ICALL                                             $5      
          6        JMP_SET                                              ~6      $5, ->8
          7        QM_ASSIGN                                            ~6      <array>
          8        SEND_VAL                                                     ~6
          9        DO_ICALL                                             $7      
         10        ASSIGN                                                       !1, $7
   14    11        INIT_FCALL                                                   'array_combine'
   15    12        SEND_VAR                                                     !1
   16    13        INIT_FCALL                                                   'array_map'
   17    14        DECLARE_LAMBDA_FUNCTION                              ~9      [0]
         15        BIND_LEXICAL                                                 ~9, !0
         16        SEND_VAL                                                     ~9
   18    17        SEND_VAR                                                     !1
   16    18        DO_ICALL                                             $10     
   18    19        SEND_VAR                                                     $10
   14    20        DO_ICALL                                             $11     
         21        ASSIGN                                                       !2, $11
   20    22        INIT_FCALL                                                   'print_r'
         23        SEND_VAR                                                     !2
         24        DO_ICALL                                                     
         25      > 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/v3efA
function name:  {closure:/in/v3efA:17}
number of ops:  11
compiled vars:  !0 = $k, !1 = $arr
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   17     0  E >   RECV                                                 !0      
          1        BIND_STATIC                                                  !1
          2        INIT_FCALL                                                   'max'
          3        INIT_FCALL                                                   'array_column'
          4        SEND_VAR                                                     !1
          5        SEND_VAR                                                     !0
          6        DO_ICALL                                             $2      
          7        SEND_VAR                                                     $2
          8        DO_ICALL                                             $3      
          9      > RETURN                                                       $3
         10*     > RETURN                                                       null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.5.0


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