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<?php function analyze(string $input): bool { $decoded = base64_decode($input); var_dump(bin2hex($decoded)); return base64_encode($decoded) === $input; } var_dump(analyze('PHP')); var_dump(analyze('PHP=')); var_dump(analyze('PHM='));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/OM5jE
function name:  (null)
number of ops:  19
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   11     0  E >   INIT_FCALL                                                   'var_dump'
          1        INIT_FCALL                                                   'analyze'
          2        SEND_VAL                                                     'PHP'
          3        DO_FCALL                                          0  $0      
          4        SEND_VAR                                                     $0
          5        DO_ICALL                                                     
   12     6        INIT_FCALL                                                   'var_dump'
          7        INIT_FCALL                                                   'analyze'
          8        SEND_VAL                                                     'PHP%3D'
          9        DO_FCALL                                          0  $2      
         10        SEND_VAR                                                     $2
         11        DO_ICALL                                                     
   13    12        INIT_FCALL                                                   'var_dump'
         13        INIT_FCALL                                                   'analyze'
         14        SEND_VAL                                                     'PHM%3D'
         15        DO_FCALL                                          0  $4      
         16        SEND_VAR                                                     $4
         17        DO_ICALL                                                     
         18      > RETURN                                                       1

Function analyze:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/OM5jE
function name:  analyze
number of ops:  19
compiled vars:  !0 = $input, !1 = $decoded
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   RECV                                                 !0      
    5     1        INIT_FCALL                                                   'base64_decode'
          2        SEND_VAR                                                     !0
          3        DO_ICALL                                             $2      
          4        ASSIGN                                                       !1, $2
    6     5        INIT_FCALL                                                   'var_dump'
          6        INIT_FCALL                                                   'bin2hex'
          7        SEND_VAR                                                     !1
          8        DO_ICALL                                             $4      
          9        SEND_VAR                                                     $4
         10        DO_ICALL                                                     
    8    11        INIT_FCALL                                                   'base64_encode'
         12        SEND_VAR                                                     !1
         13        DO_ICALL                                             $6      
         14        IS_IDENTICAL                                         ~7      !0, $6
         15        VERIFY_RETURN_TYPE                                           ~7
         16      > RETURN                                                       ~7
    9    17*       VERIFY_RETURN_TYPE                                           
         18*     > RETURN                                                       null

End of function analyze

Generated using Vulcan Logic Dumper, using php 8.5.0


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