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<?php $a[] = ["name" => "aaaaa", "projectId" => 0, "area" => "AreaX"]; $a[] = ["name" => "bbbbb", "projectId" => 2, "area" => ""]; $b[] = ["name" => "cccc", "projectId" => 1, "area" => ""]; $b[] = ["name" => "aaaaa", "projectId" => 0, "area" => "AreaX"]; $col = "projectId"; $res = array_diff(array_column($a, $col), array_column($b, $col)); print_r(array_map(function($id) use ($col) {return [$col => $id];}, $res));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/BrBMJ
function name:  (null)
number of ops:  32
compiled vars:  !0 = $a, !1 = $b, !2 = $col, !3 = $res
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN_DIM                                               !0
          1        OP_DATA                                                  <array>
    4     2        ASSIGN_DIM                                               !0
          3        OP_DATA                                                  <array>
    6     4        ASSIGN_DIM                                               !1
          5        OP_DATA                                                  <array>
    7     6        ASSIGN_DIM                                               !1
          7        OP_DATA                                                  <array>
    9     8        ASSIGN                                                   !2, 'projectId'
   10     9        INIT_FCALL                                               'array_diff'
         10        INIT_FCALL                                               'array_column'
         11        SEND_VAR                                                 !0
         12        SEND_VAR                                                 !2
         13        DO_ICALL                                         $9      
         14        SEND_VAR                                                 $9
         15        INIT_FCALL                                               'array_column'
         16        SEND_VAR                                                 !1
         17        SEND_VAR                                                 !2
         18        DO_ICALL                                         $10     
         19        SEND_VAR                                                 $10
         20        DO_ICALL                                         $11     
         21        ASSIGN                                                   !3, $11
   11    22        INIT_FCALL                                               'print_r'
         23        INIT_FCALL                                               'array_map'
         24        DECLARE_LAMBDA_FUNCTION                          ~13     [0]
         25        BIND_LEXICAL                                             ~13, !2
         26        SEND_VAL                                                 ~13
         27        SEND_VAR                                                 !3
         28        DO_ICALL                                         $14     
         29        SEND_VAR                                                 $14
         30        DO_ICALL                                                 
         31      > 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/BrBMJ
function name:  {closure}
number of ops:  5
compiled vars:  !0 = $id, !1 = $col
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
          0  E >   RECV                                             !0      
          1        BIND_STATIC                                              !1
          2        INIT_ARRAY                                       ~2      !0, !1
          3      > RETURN                                                   ~2
          4*     > RETURN                                                   null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.0.0


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