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<?php function machine_forget(&$data) { $data = null; } $answer = 42; var_dump((string)$answer); machine_forget($answer); var_dump((string)$answer); // shhh no spoilers eval(base64_decode('CmNsYXNzIHpvbWJpZQp7CiAgICBwcm90ZWN0ZWQgJHZhbDsKICAgIHB1YmxpYyBmdW5jdGlvbiBfX2NvbnN0cnVjdCgkdmFsKQogICAgewogICAgICAgICR0aGlzLT52YWwgPSAkdmFsOwogICAgfQoKICAgIHB1YmxpYyBmdW5jdGlvbiBfX2Rlc3RydWN0KCkKICAgIHsKICAgICAgICAkdGhpcy0+dmVzc2VsID0gJHRoaXM7CiAgICB9CgogICAgcHVibGljIGZ1bmN0aW9uIF9fdG9TdHJpbmcoKQogICAgewogICAgICAgIHJldHVybiAkdGhpcy0+dmFsOwogICAgfQp9CgokYW5zd2VyID0gbmV3IHpvbWJpZSgiNDIiKTsKJGFuc3dlci0+dmVzc2VsID0gJiRhbnN3ZXI7')); var_dump((string)$answer); machine_forget($answer); var_dump((string)$answer); // DID NOT FORGET $answer = 42; var_dump((string)$answer); machine_forget($answer); var_dump((string)$answer); // FORGOT
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/4AQO4
function name:  (null)
number of ops:  40
compiled vars:  !0 = $answer
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   ASSIGN                                                   !0, 42
    8     1        INIT_FCALL                                               'var_dump'
          2        CAST                                          6  ~2      !0
          3        SEND_VAL                                                 ~2
          4        DO_ICALL                                                 
    9     5        INIT_FCALL                                               'machine_forget'
          6        SEND_REF                                                 !0
          7        DO_FCALL                                      0          
   10     8        INIT_FCALL                                               'var_dump'
          9        CAST                                          6  ~5      !0
         10        SEND_VAL                                                 ~5
         11        DO_ICALL                                                 
   13    12        INIT_FCALL                                               'base64_decode'
         13        SEND_VAL                                                 'CmNsYXNzIHpvbWJpZQp7CiAgICBwcm90ZWN0ZWQgJHZhbDsKICAgIHB1YmxpYyBmdW5jdGlvbiBfX2NvbnN0cnVjdCgkdmFsKQogICAgewogICAgICAgICR0aGlzLT52YWwgPSAkdmFsOwogICAgfQoKICAgIHB1YmxpYyBmdW5jdGlvbiBfX2Rlc3RydWN0KCkKICAgIHsKICAgICAgICAkdGhpcy0%2BdmVzc2VsID0gJHRoaXM7CiAgICB9CgogICAgcHVibGljIGZ1bmN0aW9uIF9fdG9TdHJpbmcoKQogICAgewogICAgICAgIHJldHVybiAkdGhpcy0%2BdmFsOwogICAgfQp9CgokYW5zd2VyID0gbmV3IHpvbWJpZSgiNDIiKTsKJGFuc3dlci0%2BdmVzc2VsID0gJiRhbnN3ZXI7'
         14        DO_ICALL                                         $7      
         15        INCLUDE_OR_EVAL                                          $7, EVAL
   15    16        INIT_FCALL                                               'var_dump'
         17        CAST                                          6  ~9      !0
         18        SEND_VAL                                                 ~9
         19        DO_ICALL                                                 
   16    20        INIT_FCALL                                               'machine_forget'
         21        SEND_REF                                                 !0
         22        DO_FCALL                                      0          
   17    23        INIT_FCALL                                               'var_dump'
         24        CAST                                          6  ~12     !0
         25        SEND_VAL                                                 ~12
         26        DO_ICALL                                                 
   22    27        ASSIGN                                                   !0, 42
   23    28        INIT_FCALL                                               'var_dump'
         29        CAST                                          6  ~15     !0
         30        SEND_VAL                                                 ~15
         31        DO_ICALL                                                 
   24    32        INIT_FCALL                                               'machine_forget'
         33        SEND_REF                                                 !0
         34        DO_FCALL                                      0          
   25    35        INIT_FCALL                                               'var_dump'
         36        CAST                                          6  ~18     !0
         37        SEND_VAL                                                 ~18
         38        DO_ICALL                                                 
   28    39      > RETURN                                                   1

Function machine_forget:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/4AQO4
function name:  machine_forget
number of ops:  3
compiled vars:  !0 = $data
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
    4     1        ASSIGN                                                   !0, null
    5     2      > RETURN                                                   null

End of function machine_forget

Generated using Vulcan Logic Dumper, using php 8.0.0


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