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<?php class TestKey { private $data = array(); public function __set($name, $value) { $this->data[$name] = $value; } public function __get($name) { return @$this->data[$name]; } /** As of PHP 5.1.0 */ public function __isset($name) { if (array_key_exists($name, $this->data)) { return true; } return false; } /** As of PHP 5.1.0 */ public function __unset($name) { unset($this->data[$name]); } } class TestValue { private $data = array(); public function __set($name, $value) { $this->data[$name] = $value; } public function __get($name) { return @$this->data[$name]; } /** As of PHP 5.1.0 */ public function __isset($name) { return isset($this->data[$name]); } /** As of PHP 5.1.0 */ public function __unset($name) { $this->data[$name] = null; } } $k = new TestKey(); $v = new TestValue(); $k->foo = $v->foo = "bar"; var_dump(isset($k->foo) === isset($v->foo)); $k->foo = $v->foo = null; var_dump(isset($k->foo) === isset($v->foo)); unset($k->foo, $v->foo); var_dump(isset($k->foo) === isset($v->foo));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/TQGdK
function name:  (null)
number of ops:  35
compiled vars:  !0 = $k, !1 = $v
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   50     0  E >   NEW                                              $2      'TestKey'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $2
   51     3        NEW                                              $5      'TestValue'
          4        DO_FCALL                                      0          
          5        ASSIGN                                                   !1, $5
   53     6        ASSIGN_OBJ                                       ~9      !1, 'foo'
          7        OP_DATA                                                  'bar'
          8        ASSIGN_OBJ                                               !0, 'foo'
          9        OP_DATA                                                  ~9
   54    10        INIT_FCALL                                               'var_dump'
         11        ISSET_ISEMPTY_PROP_OBJ                           ~10     !0, 'foo'
         12        ISSET_ISEMPTY_PROP_OBJ                           ~11     !1, 'foo'
         13        IS_IDENTICAL                                     ~12     ~10, ~11
         14        SEND_VAL                                                 ~12
         15        DO_ICALL                                                 
   55    16        ASSIGN_OBJ                                       ~15     !1, 'foo'
         17        OP_DATA                                                  null
         18        ASSIGN_OBJ                                               !0, 'foo'
         19        OP_DATA                                                  ~15
   56    20        INIT_FCALL                                               'var_dump'
         21        ISSET_ISEMPTY_PROP_OBJ                           ~16     !0, 'foo'
         22        ISSET_ISEMPTY_PROP_OBJ                           ~17     !1, 'foo'
         23        IS_IDENTICAL                                     ~18     ~16, ~17
         24        SEND_VAL                                                 ~18
         25        DO_ICALL                                                 
   57    26        UNSET_OBJ                                                !0, 'foo'
         27        UNSET_OBJ                                                !1, 'foo'
   58    28        INIT_FCALL                                               'var_dump'
         29        ISSET_ISEMPTY_PROP_OBJ                           ~20     !0, 'foo'
         30        ISSET_ISEMPTY_PROP_OBJ                           ~21     !1, 'foo'
         31        IS_IDENTICAL                                     ~22     ~20, ~21
         32        SEND_VAL                                                 ~22
         33        DO_ICALL                                                 
         34      > RETURN                                                   1

Class TestKey:
Function __set:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/TQGdK
function name:  __set
number of ops:  6
compiled vars:  !0 = $name, !1 = $value
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   RECV                                             !0      
          1        RECV                                             !1      
    6     2        FETCH_OBJ_W                                      $2      'data'
          3        ASSIGN_DIM                                               $2, !0
          4        OP_DATA                                                  !1
    7     5      > RETURN                                                   null

End of function __set

Function __get:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/TQGdK
function name:  __get
number of ops:  7
compiled vars:  !0 = $name
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    9     0  E >   RECV                                             !0      
   10     1        BEGIN_SILENCE                                    ~1      
          2        FETCH_OBJ_R                                      ~2      'data'
          3        FETCH_DIM_R                                      ~3      ~2, !0
          4        END_SILENCE                                              ~1
          5      > RETURN                                                   ~3
   11     6*     > RETURN                                                   null

End of function __get

Function __isset:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 4, Position 2 = 5
Branch analysis from position: 4
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 5
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/TQGdK
function name:  __isset
number of ops:  7
compiled vars:  !0 = $name
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   14     0  E >   RECV                                             !0      
   15     1        FETCH_OBJ_R                                      ~1      'data'
          2        ARRAY_KEY_EXISTS                                         !0, ~1
          3      > JMPZ                                                     ~2, ->5
   16     4    > > RETURN                                                   <true>
   19     5    > > RETURN                                                   <false>
   20     6*     > RETURN                                                   null

End of function __isset

Function __unset:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/TQGdK
function name:  __unset
number of ops:  4
compiled vars:  !0 = $name
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   23     0  E >   RECV                                             !0      
   24     1        FETCH_OBJ_UNSET                                  $1      'data'
          2        UNSET_DIM                                                $1, !0
   25     3      > RETURN                                                   null

End of function __unset

End of class TestKey.

Class TestValue:
Function __set:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/TQGdK
function name:  __set
number of ops:  6
compiled vars:  !0 = $name, !1 = $value
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   31     0  E >   RECV                                             !0      
          1        RECV                                             !1      
   32     2        FETCH_OBJ_W                                      $2      'data'
          3        ASSIGN_DIM                                               $2, !0
          4        OP_DATA                                                  !1
   33     5      > RETURN                                                   null

End of function __set

Function __get:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/TQGdK
function name:  __get
number of ops:  7
compiled vars:  !0 = $name
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   35     0  E >   RECV                                             !0      
   36     1        BEGIN_SILENCE                                    ~1      
          2        FETCH_OBJ_R                                      ~2      'data'
          3        FETCH_DIM_R                                      ~3      ~2, !0
          4        END_SILENCE                                              ~1
          5      > RETURN                                                   ~3
   37     6*     > RETURN                                                   null

End of function __get

Function __isset:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/TQGdK
function name:  __isset
number of ops:  5
compiled vars:  !0 = $name
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   40     0  E >   RECV                                             !0      
   41     1        FETCH_OBJ_IS                                     ~1      'data'
          2        ISSET_ISEMPTY_DIM_OBJ                         0  ~2      ~1, !0
          3      > RETURN                                                   ~2
   42     4*     > RETURN                                                   null

End of function __isset

Function __unset:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/TQGdK
function name:  __unset
number of ops:  5
compiled vars:  !0 = $name
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   45     0  E >   RECV                                             !0      
   46     1        FETCH_OBJ_W                                      $1      'data'
          2        ASSIGN_DIM                                               $1, !0
          3        OP_DATA                                                  null
   47     4      > RETURN                                                   null

End of function __unset

End of class TestValue.

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