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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 A implements ArrayAccess { private $callCount = 0; public $func; public function __construct(){ $this->func = function(){ echo "A".$this->secret."B";die; }; } public function __invoke(){ return $this->func; } public function offsetSet($offset, $value) {} public function offsetExists($offset) { return true; } public function offsetUnset($offset) {} public function offsetGet($offset) { $this->callCount++; if ($this->callCount == 1){ $r = $this; } else { $r = "callback"; } return $r; } } $a = new A; $a->func = $a->func->bindTo($test); $test->foo = $a; // end editing here echo $test->run();
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/MRA9C
function name:  (null)
number of ops:  19
compiled vars:  !0 = $test, !1 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   42     0  E >   NEW                                              $2      'Test'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $2
   46     3        DECLARE_CLASS                                            'a'
   83     4        NEW                                              $5      'A'
          5        DO_FCALL                                      0          
          6        ASSIGN                                                   !1, $5
   84     7        FETCH_OBJ_R                                      ~9      !1, 'func'
          8        INIT_METHOD_CALL                                         ~9, 'bindTo'
          9        SEND_VAR_EX                                              !0
         10        DO_FCALL                                      0  $10     
         11        ASSIGN_OBJ                                               !1, 'func'
         12        OP_DATA                                                  $10
   85    13        ASSIGN_OBJ                                               !0, 'foo'
         14        OP_DATA                                                  !1
   90    15        INIT_METHOD_CALL                                         !0, 'run'
         16        DO_FCALL                                      0  $12     
         17        ECHO                                                     $12
         18      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2FMRA9C%3A52%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 79) Position 1 = -2
filename:       /in/MRA9C
function name:  {closure}
number of ops:  7
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   53     0  E >   FETCH_THIS                                       $0      
          1        FETCH_OBJ_R                                      ~1      $0, 'secret'
          2        CONCAT                                           ~2      'A', ~1
          3        CONCAT                                           ~3      ~2, 'B'
          4        ECHO                                                     ~3
          5      > EXIT                                                     
   54     6*     > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FMRA9C%3A52%240

Class Test:
Function run:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/MRA9C
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/MRA9C
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
   36     8        ASSIGN_OBJ                                               !2
          9        OP_DATA                                                  !3
   37    10      > RETURN                                                   null

End of function __set

End of class Test.

Class A:
Function __construct:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/MRA9C
function name:  __construct
number of ops:  4
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   52     0  E >   DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FMRA9C%3A52%240'
          1        ASSIGN_OBJ                                               'func'
   54     2        OP_DATA                                                  ~1
   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/MRA9C
function name:  __invoke
number of ops:  3
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   58     0  E >   FETCH_OBJ_R                                      ~0      'func'
          1      > RETURN                                                   ~0
   60     2*     > RETURN                                                   null

End of function __invoke

Function offsetset:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/MRA9C
function name:  offsetSet
number of ops:  3
compiled vars:  !0 = $offset, !1 = $value
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   67     0  E >   RECV                                             !0      
          1        RECV                                             !1      
          2      > RETURN                                                   null

End of function offsetset

Function offsetexists:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/MRA9C
function name:  offsetExists
number of ops:  3
compiled vars:  !0 = $offset
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   68     0  E >   RECV                                             !0      
          1      > RETURN                                                   <true>
          2*     > RETURN                                                   null

End of function offsetexists

Function offsetunset:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/MRA9C
function name:  offsetUnset
number of ops:  2
compiled vars:  !0 = $offset
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   69     0  E >   RECV                                             !0      
          1      > RETURN                                                   null

End of function offsetunset

Function offsetget:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 5, Position 2 = 8
Branch analysis from position: 5
1 jumps found. (Code = 42) Position 1 = 9
Branch analysis from position: 9
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 8
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/MRA9C
function name:  offsetGet
number of ops:  11
compiled vars:  !0 = $offset, !1 = $r
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   70     0  E >   RECV                                             !0      
   71     1        PRE_INC_OBJ                                              'callCount'
   72     2        FETCH_OBJ_R                                      ~3      'callCount'
          3        IS_EQUAL                                                 ~3, 1
          4      > JMPZ                                                     ~4, ->8
   73     5    >   FETCH_THIS                                       ~5      
          6        ASSIGN                                                   !1, ~5
          7      > JMP                                                      ->9
   75     8    >   ASSIGN                                                   !1, 'callback'
   78     9    > > RETURN                                                   !1
   79    10*     > RETURN                                                   null

End of function offsetget

End of class A.

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