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<?php // Asume loginserver as 0 $_POST['loginserver'] = 0; if ($_POST['loginserver'] == 'login'){ print("Type conversion bug"); // This should not print } else{ print("Ok"); } // Proper Way if ($_POST['loginserver'] === 'login'){ print("Welcome"); // This should not print } else{ print("Proper Way"); }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 7, Position 2 = 9
Branch analysis from position: 7
1 jumps found. (Code = 42) Position 1 = 10
Branch analysis from position: 10
2 jumps found. (Code = 43) Position 1 = 14, Position 2 = 16
Branch analysis from position: 14
1 jumps found. (Code = 42) Position 1 = 17
Branch analysis from position: 17
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 16
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 9
2 jumps found. (Code = 43) Position 1 = 14, Position 2 = 16
Branch analysis from position: 14
Branch analysis from position: 16
filename:       /in/sOAot
function name:  (null)
number of ops:  18
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   FETCH_W                      global              $0      '_POST'
          1        ASSIGN_DIM                                               $0, 'loginserver'
          2        OP_DATA                                                  0
    5     3        FETCH_R                      global              ~2      '_POST'
          4        FETCH_DIM_R                                      ~3      ~2, 'loginserver'
          5        IS_EQUAL                                                 ~3, 'login'
          6      > JMPZ                                                     ~4, ->9
    6     7    >   ECHO                                                     'Type+conversion+bug'
          8      > JMP                                                      ->10
    9     9    >   ECHO                                                     'Ok'
   13    10    >   FETCH_R                      global              ~5      '_POST'
         11        FETCH_DIM_R                                      ~6      ~5, 'loginserver'
         12        IS_IDENTICAL                                             ~6, 'login'
         13      > JMPZ                                                     ~7, ->16
   14    14    >   ECHO                                                     'Welcome'
         15      > JMP                                                      ->17
   16    16    >   ECHO                                                     'Proper+Way'
   17    17    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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