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<?php $a = new stdClass; $a->{'abc@gmail.com'} = []; $b = new stdClass; $b->{'xyz@gmail.com'} = []; $c = [$a, $b]; $arr = array_reduce($c, function ($arr, $obj) { return array_merge($arr, array_keys(get_object_vars($obj))); }, []); var_dump($arr);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/IU3C9
function name:  (null)
number of ops:  24
compiled vars:  !0 = $a, !1 = $b, !2 = $c, !3 = $arr
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   NEW                                              $4      'stdClass'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $4
    4     3        ASSIGN_OBJ                                               !0, 'abc%40gmail.com'
          4        OP_DATA                                                  <array>
    6     5        NEW                                              $8      'stdClass'
          6        DO_FCALL                                      0          
          7        ASSIGN                                                   !1, $8
    7     8        ASSIGN_OBJ                                               !1, 'xyz%40gmail.com'
          9        OP_DATA                                                  <array>
    9    10        INIT_ARRAY                                       ~12     !0
         11        ADD_ARRAY_ELEMENT                                ~12     !1
         12        ASSIGN                                                   !2, ~12
   11    13        INIT_FCALL                                               'array_reduce'
         14        SEND_VAR                                                 !2
         15        DECLARE_LAMBDA_FUNCTION                          ~14     [0]
   13    16        SEND_VAL                                                 ~14
         17        SEND_VAL                                                 <array>
   11    18        DO_ICALL                                         $15     
         19        ASSIGN                                                   !3, $15
   15    20        INIT_FCALL                                               'var_dump'
         21        SEND_VAR                                                 !3
         22        DO_ICALL                                                 
         23      > 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/IU3C9
function name:  {closure}
number of ops:  14
compiled vars:  !0 = $arr, !1 = $obj
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   11     0  E >   RECV                                             !0      
          1        RECV                                             !1      
   12     2        INIT_FCALL                                               'array_merge'
          3        SEND_VAR                                                 !0
          4        INIT_FCALL                                               'array_keys'
          5        INIT_FCALL                                               'get_object_vars'
          6        SEND_VAR                                                 !1
          7        DO_ICALL                                         $2      
          8        SEND_VAR                                                 $2
          9        DO_ICALL                                         $3      
         10        SEND_VAR                                                 $3
         11        DO_ICALL                                         $4      
         12      > RETURN                                                   $4
   13    13*     > RETURN                                                   null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.0.0


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