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<?php is_noble('Example'); // true $a = 'Hello'; $b = 'World'; is_noble($a); // true is_noble($a . $b); // true, конкатенация двух чистых строк тоже чистая is_noble("Hi $b"); // true is_noble($_GET['id']); // false потому что данные от пользователя is_noble(sprintf('Hi %s', $_GET['name'])); // false is_noble('/bin/rm -rf ' . $_GET['path']); // false is_noble('<img src=' . htmlentities($_GET['src']) . ' />'); // false — никакой ескейпинг не делает строку чистой is_noble('WHERE id = ' . $db->real_escape_string($_GET['id'])); // false
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/1aFC2
function name:  (null)
number of ops:  59
compiled vars:  !0 = $a, !1 = $b, !2 = $db
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL_BY_NAME                                       'is_noble'
          1        SEND_VAL_EX                                              'Example'
          2        DO_FCALL                                      0          
    5     3        ASSIGN                                                   !0, 'Hello'
    6     4        ASSIGN                                                   !1, 'World'
    8     5        INIT_FCALL_BY_NAME                                       'is_noble'
          6        SEND_VAR_EX                                              !0
          7        DO_FCALL                                      0          
    9     8        INIT_FCALL_BY_NAME                                       'is_noble'
          9        CONCAT                                           ~7      !0, !1
         10        SEND_VAL_EX                                              ~7
         11        DO_FCALL                                      0          
   10    12        INIT_FCALL_BY_NAME                                       'is_noble'
         13        NOP                                                      
         14        FAST_CONCAT                                      ~9      'Hi+', !1
         15        SEND_VAL_EX                                              ~9
         16        DO_FCALL                                      0          
   12    17        INIT_FCALL_BY_NAME                                       'is_noble'
         18        CHECK_FUNC_ARG                                           
         19        FETCH_FUNC_ARG               global              $11     '_GET'
         20        FETCH_DIM_FUNC_ARG                               $12     $11, 'id'
         21        SEND_FUNC_ARG                                            $12
         22        DO_FCALL                                      0          
   13    23        INIT_FCALL_BY_NAME                                       'is_noble'
         24        INIT_FCALL                                               'sprintf'
         25        SEND_VAL                                                 'Hi+%25s'
         26        FETCH_R                      global              ~14     '_GET'
         27        FETCH_DIM_R                                      ~15     ~14, 'name'
         28        SEND_VAL                                                 ~15
         29        DO_ICALL                                         $16     
         30        SEND_VAR_NO_REF_EX                                       $16
         31        DO_FCALL                                      0          
   14    32        INIT_FCALL_BY_NAME                                       'is_noble'
         33        FETCH_R                      global              ~18     '_GET'
         34        FETCH_DIM_R                                      ~19     ~18, 'path'
         35        CONCAT                                           ~20     '%2Fbin%2Frm+-rf+', ~19
         36        SEND_VAL_EX                                              ~20
         37        DO_FCALL                                      0          
   15    38        INIT_FCALL_BY_NAME                                       'is_noble'
         39        INIT_FCALL                                               'htmlentities'
         40        FETCH_R                      global              ~22     '_GET'
         41        FETCH_DIM_R                                      ~23     ~22, 'src'
         42        SEND_VAL                                                 ~23
         43        DO_ICALL                                         $24     
         44        CONCAT                                           ~25     '%3Cimg+src%3D', $24
         45        CONCAT                                           ~26     ~25, '+%2F%3E'
         46        SEND_VAL_EX                                              ~26
         47        DO_FCALL                                      0          
   16    48        INIT_FCALL_BY_NAME                                       'is_noble'
         49        INIT_METHOD_CALL                                         !2, 'real_escape_string'
         50        CHECK_FUNC_ARG                                           
         51        FETCH_FUNC_ARG               global              $28     '_GET'
         52        FETCH_DIM_FUNC_ARG                               $29     $28, 'id'
         53        SEND_FUNC_ARG                                            $29
         54        DO_FCALL                                      0  $30     
         55        CONCAT                                           ~31     'WHERE+id+%3D+', $30
         56        SEND_VAL_EX                                              ~31
         57        DO_FCALL                                      0          
         58      > RETURN                                                   1

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