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<?php interface ArrayAccessInterface extends ArrayAccess { public function keyExists(string $offset): bool; public function offsetIsset(string $offset): bool; } abstract class ArrayAccessAbstract implements ArrayAccessInterface { public function offsetExists($offset): bool { return static::offsetIsset((string) $offset); } } class C extends ArrayAccessAbstract { public $data = array( "foo" => null ); public function keyExists(string $offset): bool { return array_key_exists($offset, $this->data); } public function offsetIsset(string $offset): bool { return isset($this->data[$offset]); } public function offsetGet($offset) { return $this->data[$offset]; } public function offsetSet($offset, $value): void { $this->data[$offset] = $value; } public function offsetUnset($offset): void { unset($this->data[$offset]); } } $o = new C(); var_dump(empty($o['foo'])); var_dump(isset($o['foo'])); var_dump($o->keyExists('foo')); var_dump(property_exists($o, 'foo')); #var_dump(array_key_exists('foo', $o)); #var_dump(array_key_exists('foo', ['foo' => null]));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/GDOuR
function name:  (null)
number of ops:  25
compiled vars:  !0 = $o
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   DECLARE_CLASS                                                'arrayaccessinterface'
    9     1        DECLARE_CLASS                                                'arrayaccessabstract'
   17     2        DECLARE_CLASS                                                'c', 'arrayaccessabstract'
   44     3        NEW                                                  $1      'C'
          4        DO_FCALL                                          0          
          5        ASSIGN                                                       !0, $1
   46     6        INIT_FCALL                                                   'var_dump'
          7        ISSET_ISEMPTY_DIM_OBJ                             1  ~4      !0, 'foo'
          8        SEND_VAL                                                     ~4
          9        DO_ICALL                                                     
   47    10        INIT_FCALL                                                   'var_dump'
         11        ISSET_ISEMPTY_DIM_OBJ                             0  ~6      !0, 'foo'
         12        SEND_VAL                                                     ~6
         13        DO_ICALL                                                     
   48    14        INIT_FCALL                                                   'var_dump'
         15        INIT_METHOD_CALL                                             !0, 'keyExists'
         16        SEND_VAL_EX                                                  'foo'
         17        DO_FCALL                                          0  $8      
         18        SEND_VAR                                                     $8
         19        DO_ICALL                                                     
   49    20        INIT_FCALL                                                   'var_dump'
         21        FRAMELESS_ICALL_2                property_exists      ~10     !0, 'foo'
         22        SEND_VAL                                                     ~10
         23        DO_ICALL                                                     
   51    24      > RETURN                                                       1

Class ArrayAccessInterface:
Function keyexists:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/GDOuR
function name:  keyExists
number of ops:  3
compiled vars:  !0 = $offset
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    5     0  E >   RECV                                                 !0      
          1        VERIFY_RETURN_TYPE                                           
          2      > RETURN                                                       null

End of function keyexists

Function offsetisset:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/GDOuR
function name:  offsetIsset
number of ops:  3
compiled vars:  !0 = $offset
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    6     0  E >   RECV                                                 !0      
          1        VERIFY_RETURN_TYPE                                           
          2      > RETURN                                                       null

End of function offsetisset

End of class ArrayAccessInterface.

Class ArrayAccessAbstract:
Function offsetexists:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/GDOuR
function name:  offsetExists
number of ops:  9
compiled vars:  !0 = $offset
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   11     0  E >   RECV                                                 !0      
   13     1        INIT_STATIC_METHOD_CALL                                      'offsetIsset'
          2        CAST                                              6  ~1      !0
          3        SEND_VAL_EX                                                  ~1
          4        DO_FCALL                                          0  $2      
          5        VERIFY_RETURN_TYPE                                           $2
          6      > RETURN                                                       $2
   14     7*       VERIFY_RETURN_TYPE                                           
          8*     > RETURN                                                       null

End of function offsetexists

End of class ArrayAccessAbstract.

Class C:
Function keyexists:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/GDOuR
function name:  keyExists
number of ops:  7
compiled vars:  !0 = $offset
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   22     0  E >   RECV                                                 !0      
   24     1        FETCH_OBJ_R                                          ~1      'data'
          2        ARRAY_KEY_EXISTS                                     ~2      !0, ~1
          3        VERIFY_RETURN_TYPE                                           ~2
          4      > RETURN                                                       ~2
   25     5*       VERIFY_RETURN_TYPE                                           
          6*     > RETURN                                                       null

End of function keyexists

Function offsetisset:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/GDOuR
function name:  offsetIsset
number of ops:  7
compiled vars:  !0 = $offset
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   26     0  E >   RECV                                                 !0      
   28     1        FETCH_OBJ_IS                                         ~1      'data'
          2        ISSET_ISEMPTY_DIM_OBJ                             0  ~2      ~1, !0
          3        VERIFY_RETURN_TYPE                                           ~2
          4      > RETURN                                                       ~2
   29     5*       VERIFY_RETURN_TYPE                                           
          6*     > RETURN                                                       null

End of function offsetisset

Function offsetget:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/GDOuR
function name:  offsetGet
number of ops:  5
compiled vars:  !0 = $offset
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   30     0  E >   RECV                                                 !0      
   32     1        FETCH_OBJ_R                                          ~1      'data'
          2        FETCH_DIM_R                                          ~2      ~1, !0
          3      > RETURN                                                       ~2
   33     4*     > RETURN                                                       null

End of function offsetget

Function offsetset:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/GDOuR
function name:  offsetSet
number of ops:  6
compiled vars:  !0 = $offset, !1 = $value
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   34     0  E >   RECV                                                 !0      
          1        RECV                                                 !1      
   36     2        FETCH_OBJ_W                                          $2      'data'
          3        ASSIGN_DIM                                                   $2, !0
          4        OP_DATA                                                      !1
   37     5      > RETURN                                                       null

End of function offsetset

Function offsetunset:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/GDOuR
function name:  offsetUnset
number of ops:  4
compiled vars:  !0 = $offset
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   38     0  E >   RECV                                                 !0      
   40     1        FETCH_OBJ_UNSET                                      $1      'data'
          2        UNSET_DIM                                                    $1, !0
   41     3      > RETURN                                                       null

End of function offsetunset

End of class C.

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