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<?php function func(&$data) { foreach ($data as $key => $value) { if (is_array($value)) { func($data[$key]); } } } $data = [ ['zero' => [0]], ['one' => [1]], ]; debug_zval_dump($data[1]['one']); func($data); debug_zval_dump($data[1]['one']);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/forsK
function name:  (null)
number of ops:  15
compiled vars:  !0 = $data
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   11     0  E >   ASSIGN                                                   !0, <array>
   15     1        INIT_FCALL                                               'debug_zval_dump'
          2        FETCH_DIM_R                                      ~2      !0, 1
          3        FETCH_DIM_R                                      ~3      ~2, 'one'
          4        SEND_VAL                                                 ~3
          5        DO_ICALL                                                 
   16     6        INIT_FCALL                                               'func'
          7        SEND_REF                                                 !0
          8        DO_FCALL                                      0          
   17     9        INIT_FCALL                                               'debug_zval_dump'
         10        FETCH_DIM_R                                      ~6      !0, 1
         11        FETCH_DIM_R                                      ~7      ~6, 'one'
         12        SEND_VAL                                                 ~7
         13        DO_ICALL                                                 
         14      > RETURN                                                   1

Function func:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 2, Position 2 = 12
Branch analysis from position: 2
2 jumps found. (Code = 78) Position 1 = 3, Position 2 = 12
Branch analysis from position: 3
2 jumps found. (Code = 43) Position 1 = 6, Position 2 = 11
Branch analysis from position: 6
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 11
Branch analysis from position: 12
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 12
filename:       /in/forsK
function name:  func
number of ops:  14
compiled vars:  !0 = $data, !1 = $value, !2 = $key
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
    4     1      > FE_RESET_R                                       $3      !0, ->12
          2    > > FE_FETCH_R                                       ~4      $3, !1, ->12
          3    >   ASSIGN                                                   !2, ~4
    5     4        TYPE_CHECK                                  128          !1
          5      > JMPZ                                                     ~6, ->11
    6     6    >   INIT_FCALL_BY_NAME                                       'func'
          7        CHECK_FUNC_ARG                                           
          8        FETCH_DIM_FUNC_ARG                               $7      !0, !2
          9        SEND_FUNC_ARG                                            $7
         10        DO_FCALL                                      0          
    4    11    > > JMP                                                      ->2
         12    >   FE_FREE                                                  $3
    9    13      > RETURN                                                   null

End of function func

Generated using Vulcan Logic Dumper, using php 8.0.0


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