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<?php /* Challenge 1: Modify Test::$secret before it's output. Rules:: 1. No use of Reflection API / runkit extension 2. No stopping execution before Test::run() 3. No Exceptions or PHP errors / warnings notices allowed Hints: 1. Caesar 2. Magic methods 3. Requires a new feature of PHP 5.4 */ class Test { private $secret = 'Nyy lbhe Onfr ner orybat gb hf.'; private $callback; final public function run() { call_user_func($this->callback); return $this->secret . PHP_EOL; } public function __set($k, $v) { $key = $v[($v[$v])]; // $v is some kind of weird array $value = $v(); // and a callback! $this->{$key} = $value; } } $test = new Test; // start editing here class Fixer extends ArrayObject { public function offsetGet($i) { return 'callback'; } public function __construct($test) { $this->test = $test; } public function __invoke() { $fix = function () { $this->secret = str_rot13($this->secret); }; return $fix->bindTo($this->test, 'Test'); } } $test->foo = new Fixer($test); // end editing here echo $test->run();
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/n5vs6
function name:  (null)
number of ops:  12
compiled vars:  !0 = $test
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   41     0  E >   NEW                                              $1      'Test'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $1
   66     3        NEW                                              $5      'Fixer'
          4        SEND_VAR_EX                                              !0
          5        DO_FCALL                                      0          
          6        ASSIGN_OBJ                                               !0, 'foo'
          7        OP_DATA                                                  $5
   70     8        INIT_METHOD_CALL                                         !0, 'run'
          9        DO_FCALL                                      0  $7      
         10        ECHO                                                     $7
         11      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2Fn5vs6%3A59%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/n5vs6
function name:  {closure}
number of ops:  9
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   60     0  E >   FETCH_THIS                                       $0      
          1        INIT_FCALL                                               'str_rot13'
          2        FETCH_THIS                                       $2      
          3        FETCH_OBJ_R                                      ~3      $2, 'secret'
          4        SEND_VAL                                                 ~3
          5        DO_ICALL                                         $4      
          6        ASSIGN_OBJ                                               $0, 'secret'
          7        OP_DATA                                                  $4
   61     8      > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2Fn5vs6%3A59%240

Class Test:
Function run:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/n5vs6
function name:  run
number of ops:  7
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   27     0  E >   FETCH_OBJ_R                                      ~0      'callback'
          1        INIT_USER_CALL                                0          'call_user_func', ~0
          2        DO_FCALL                                      0          
   28     3        FETCH_OBJ_R                                      ~2      'secret'
          4        CONCAT                                           ~3      ~2, '%0A'
          5      > RETURN                                                   ~3
   29     6*     > RETURN                                                   null

End of function run

Function __set:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/n5vs6
function name:  __set
number of ops:  11
compiled vars:  !0 = $k, !1 = $v, !2 = $key, !3 = $value
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   31     0  E >   RECV                                             !0      
          1        RECV                                             !1      
   33     2        FETCH_DIM_R                                      ~4      !1, !1
          3        FETCH_DIM_R                                      ~5      !1, ~4
          4        ASSIGN                                                   !2, ~5
   34     5        INIT_DYNAMIC_CALL                                        !1
          6        DO_FCALL                                      0  $7      
          7        ASSIGN                                                   !3, $7
   35     8        ASSIGN_OBJ                                               !2
          9        OP_DATA                                                  !3
   36    10      > RETURN                                                   null

End of function __set

End of class Test.

Class Fixer:
Function offsetget:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/n5vs6
function name:  offsetGet
number of ops:  3
compiled vars:  !0 = $i
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   47     0  E >   RECV                                             !0      
   49     1      > RETURN                                                   'callback'
   50     2*     > RETURN                                                   null

End of function offsetget

Function __construct:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/n5vs6
function name:  __construct
number of ops:  4
compiled vars:  !0 = $test
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   52     0  E >   RECV                                             !0      
   54     1        ASSIGN_OBJ                                               'test'
          2        OP_DATA                                                  !0
   55     3      > RETURN                                                   null

End of function __construct

Function __invoke:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/n5vs6
function name:  __invoke
number of ops:  10
compiled vars:  !0 = $fix
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   59     0  E >   DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2Fn5vs6%3A59%240'
          1        ASSIGN                                                   !0, ~1
   62     2        INIT_METHOD_CALL                                         !0, 'bindTo'
          3        CHECK_FUNC_ARG                                           
          4        FETCH_OBJ_FUNC_ARG                               $3      'test'
          5        SEND_FUNC_ARG                                            $3
          6        SEND_VAL_EX                                              'Test'
          7        DO_FCALL                                      0  $4      
          8      > RETURN                                                   $4
   63     9*     > RETURN                                                   null

End of function __invoke

End of class Fixer.

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