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<?php $array = [['a', 1], ['b', 1], ['c',2], ['d',2]]; $result = []; foreach ($array as $row) { $result[$row[1]][] = $row; } var_export($result); echo "\n---\n"; var_export( array_reduce( $array, function ($carry, $row) { $carry[$row[1]][] = $row; return $carry; } ) );
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 3, Position 2 = 9
Branch analysis from position: 3
2 jumps found. (Code = 78) Position 1 = 4, Position 2 = 9
Branch analysis from position: 4
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 9
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 9
filename:       /in/WCqgS
function name:  (null)
number of ops:  23
compiled vars:  !0 = $array, !1 = $result, !2 = $row
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
    5     1        ASSIGN                                                       !1, <array>
    6     2      > FE_RESET_R                                           $5      !0, ->9
          3    > > FE_FETCH_R                                                   $5, !2, ->9
    7     4    >   FETCH_DIM_R                                          ~6      !2, 1
          5        FETCH_DIM_W                                          $7      !1, ~6
          6        ASSIGN_DIM                                                   $7
          7        OP_DATA                                                      !2
    6     8      > JMP                                                          ->3
          9    >   FE_FREE                                                      $5
    9    10        INIT_FCALL                                                   'var_export'
         11        SEND_VAR                                                     !1
         12        DO_ICALL                                                     
   11    13        ECHO                                                         '%0A---%0A'
   13    14        INIT_FCALL                                                   'var_export'
   14    15        INIT_FCALL                                                   'array_reduce'
   15    16        SEND_VAR                                                     !0
   16    17        DECLARE_LAMBDA_FUNCTION                              ~10     [0]
   19    18        SEND_VAL                                                     ~10
   14    19        DO_ICALL                                             $11     
   19    20        SEND_VAR                                                     $11
   13    21        DO_ICALL                                                     
   21    22      > 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/WCqgS
function name:  {closure:/in/WCqgS:16}
number of ops:  8
compiled vars:  !0 = $carry, !1 = $row
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   16     0  E >   RECV                                                 !0      
          1        RECV                                                 !1      
   17     2        FETCH_DIM_R                                          ~2      !1, 1
          3        FETCH_DIM_W                                          $3      !0, ~2
          4        ASSIGN_DIM                                                   $3
          5        OP_DATA                                                      !1
   18     6      > RETURN                                                       !0
   19     7*     > RETURN                                                       null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.5.0


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162.87 ms | 2108 KiB | 15 Q