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<?php class Foo { private $bar = 'baz'; public function __construct() { unset($this->bar); } public function getFooBar() { return $this->bar; } } class Bar extends Foo { private $bar = 'baz'; public function __construct() { parent::__construct(); unset($this->bar); } public function getBarBar() { return $this->bar; } } $bar = new Bar(); var_dump($bar->getFooBar()); // notice + null var_dump($bar->getBarBar()); // notice + null $rBarBar = new ReflectionProperty(Foo::class, 'bar'); $rBarBar->setAccessible(true); $rBarBar->setValue($bar, __LINE__); var_dump($bar->getFooBar()); // line no. var_dump($bar->getBarBar()); // notice + null
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/pCmTV
function name:  (null)
number of ops:  36
compiled vars:  !0 = $bar, !1 = $rBarBar
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   35     0  E >   NEW                                                  $2      'Bar'
          1        DO_FCALL                                          0          
          2        ASSIGN                                                       !0, $2
   37     3        INIT_FCALL                                                   'var_dump'
          4        INIT_METHOD_CALL                                             !0, 'getFooBar'
          5        DO_FCALL                                          0  $5      
          6        SEND_VAR                                                     $5
          7        DO_ICALL                                                     
   38     8        INIT_FCALL                                                   'var_dump'
          9        INIT_METHOD_CALL                                             !0, 'getBarBar'
         10        DO_FCALL                                          0  $7      
         11        SEND_VAR                                                     $7
         12        DO_ICALL                                                     
   40    13        NEW                                                  $9      'ReflectionProperty'
         14        SEND_VAL_EX                                                  'Foo'
         15        SEND_VAL_EX                                                  'bar'
         16        DO_FCALL                                          0          
         17        ASSIGN                                                       !1, $9
   41    18        INIT_METHOD_CALL                                             !1, 'setAccessible'
         19        SEND_VAL_EX                                                  <true>
         20        DO_FCALL                                          0          
   42    21        INIT_METHOD_CALL                                             !1, 'setValue'
         22        SEND_VAR_EX                                                  !0
         23        SEND_VAL_EX                                                  42
         24        DO_FCALL                                          0          
   44    25        INIT_FCALL                                                   'var_dump'
         26        INIT_METHOD_CALL                                             !0, 'getFooBar'
         27        DO_FCALL                                          0  $14     
         28        SEND_VAR                                                     $14
         29        DO_ICALL                                                     
   45    30        INIT_FCALL                                                   'var_dump'
         31        INIT_METHOD_CALL                                             !0, 'getBarBar'
         32        DO_FCALL                                          0  $16     
         33        SEND_VAR                                                     $16
         34        DO_ICALL                                                     
         35      > RETURN                                                       1

Class Foo:
Function __construct:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/pCmTV
function name:  __construct
number of ops:  2
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    9     0  E >   UNSET_OBJ                                                    'bar'
   10     1      > RETURN                                                       null

End of function __construct

Function getfoobar:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/pCmTV
function name:  getFooBar
number of ops:  3
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   14     0  E >   FETCH_OBJ_R                                          ~0      'bar'
          1      > RETURN                                                       ~0
   15     2*     > RETURN                                                       null

End of function getfoobar

End of class Foo.

Class Bar:
Function __construct:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/pCmTV
function name:  __construct
number of ops:  4
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   24     0  E >   INIT_STATIC_METHOD_CALL                                      
          1        DO_FCALL                                          0          
   26     2        UNSET_OBJ                                                    'bar'
   27     3      > RETURN                                                       null

End of function __construct

Function getbarbar:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/pCmTV
function name:  getBarBar
number of ops:  3
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   31     0  E >   FETCH_OBJ_R                                          ~0      'bar'
          1      > RETURN                                                       ~0
   32     2*     > RETURN                                                       null

End of function getbarbar

Function getfoobar:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/pCmTV
function name:  getFooBar
number of ops:  3
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   14     0  E >   FETCH_OBJ_R                                          ~0      'bar'
          1      > RETURN                                                       ~0
   15     2*     > RETURN                                                       null

End of function getfoobar

End of class Bar.

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