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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 $callCount = 0; public function __call($name, $args){ return function(){ echo "HELLO WORLD"; }; } public function offsetSet($offset, $value) {} public function offsetExists($offset) { return true; } public function offsetUnset($offset) {} public function offsetGet($offset) { if ($this->callCount == 0){ return $this; } else { return "FOO"; } } } $test->foo = new 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/HmRk6
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
   45     3        DECLARE_CLASS                                            'a'
   74     4        NEW                                              $5      'A'
          5        DO_FCALL                                      0          
          6        ASSIGN_OBJ                                               !0, 'foo'
          7        OP_DATA                                                  $5
   79     8        INIT_METHOD_CALL                                         !0, 'run'
          9        DO_FCALL                                      0  $7      
         10        ECHO                                                     $7
         11      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2FHmRk6%3A50%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/HmRk6
function name:  {closure}
number of ops:  2
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   51     0  E >   ECHO                                                     'HELLO+WORLD'
   52     1      > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FHmRk6%3A50%240

Class Test:
Function run:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/HmRk6
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/HmRk6
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 A:
Function __call:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/HmRk6
function name:  __call
number of ops:  5
compiled vars:  !0 = $name, !1 = $args
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   49     0  E >   RECV                                             !0      
          1        RECV                                             !1      
   50     2        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FHmRk6%3A50%240'
   52     3      > RETURN                                                   ~2
   54     4*     > RETURN                                                   null

End of function __call

Function offsetset:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/HmRk6
function name:  offsetSet
number of ops:  3
compiled vars:  !0 = $offset, !1 = $value
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   61     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/HmRk6
function name:  offsetExists
number of ops:  3
compiled vars:  !0 = $offset
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   62     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/HmRk6
function name:  offsetUnset
number of ops:  2
compiled vars:  !0 = $offset
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   63     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 = 4, Position 2 = 7
Branch analysis from position: 4
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/HmRk6
function name:  offsetGet
number of ops:  9
compiled vars:  !0 = $offset
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   64     0  E >   RECV                                             !0      
   65     1        FETCH_OBJ_R                                      ~1      'callCount'
          2        IS_EQUAL                                                 ~1, 0
          3      > JMPZ                                                     ~2, ->7
   66     4    >   FETCH_THIS                                       ~3      
          5      > RETURN                                                   ~3
          6*       JMP                                                      ->8
   68     7    > > RETURN                                                   'FOO'
   70     8*     > RETURN                                                   null

End of function offsetget

End of class A.

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