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<?php class C implements ArrayAccess { public $data = array( "foo" => null ); public function offsetExists($offset): bool { return array_key_exists((string)$offset, $this->data); } public function offsetGet($offset) { return $this->data[$offset]; } public function offsetSet($offset, $value): void { $this->data[$offset] = $value; } public function offsetUnset($offset): void { unset($this->data[$offset]); } } $o = new C(); var_dump(isset($o['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/heZmC
function name:  (null)
number of ops:  21
compiled vars:  !0 = $o
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   DECLARE_CLASS                                                'c'
   26     1        NEW                                                  $1      'C'
          2        DO_FCALL                                          0          
          3        ASSIGN                                                       !0, $1
   28     4        INIT_FCALL                                                   'var_dump'
          5        ISSET_ISEMPTY_DIM_OBJ                             0  ~4      !0, 'foo'
          6        SEND_VAL                                                     ~4
          7        DO_ICALL                                                     
   29     8        INIT_FCALL                                                   'var_dump'
          9        FRAMELESS_ICALL_2                property_exists      ~6      !0, 'foo'
         10        SEND_VAL                                                     ~6
         11        DO_ICALL                                                     
   30    12        INIT_FCALL                                                   'var_dump'
         13        ARRAY_KEY_EXISTS                                     ~8      'foo', !0
         14        SEND_VAL                                                     ~8
         15        DO_ICALL                                                     
   31    16        INIT_FCALL                                                   'var_dump'
         17        ARRAY_KEY_EXISTS                                     ~10     'foo', <array>
         18        SEND_VAL                                                     ~10
         19        DO_ICALL                                                     
         20      > RETURN                                                       1

Class C:
Function offsetexists:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/heZmC
function name:  offsetExists
number of ops:  8
compiled vars:  !0 = $offset
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    8     0  E >   RECV                                                 !0      
   10     1        CAST                                              6  ~1      !0
          2        FETCH_OBJ_R                                          ~2      'data'
          3        ARRAY_KEY_EXISTS                                     ~3      ~1, ~2
          4        VERIFY_RETURN_TYPE                                           ~3
          5      > RETURN                                                       ~3
   11     6*       VERIFY_RETURN_TYPE                                           
          7*     > RETURN                                                       null

End of function offsetexists

Function offsetget:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/heZmC
function name:  offsetGet
number of ops:  5
compiled vars:  !0 = $offset
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   12     0  E >   RECV                                                 !0      
   14     1        FETCH_OBJ_R                                          ~1      'data'
          2        FETCH_DIM_R                                          ~2      ~1, !0
          3      > RETURN                                                       ~2
   15     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/heZmC
function name:  offsetSet
number of ops:  6
compiled vars:  !0 = $offset, !1 = $value
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   16     0  E >   RECV                                                 !0      
          1        RECV                                                 !1      
   18     2        FETCH_OBJ_W                                          $2      'data'
          3        ASSIGN_DIM                                                   $2, !0
          4        OP_DATA                                                      !1
   19     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/heZmC
function name:  offsetUnset
number of ops:  4
compiled vars:  !0 = $offset
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   20     0  E >   RECV                                                 !0      
   22     1        FETCH_OBJ_UNSET                                      $1      'data'
          2        UNSET_DIM                                                    $1, !0
   23     3      > RETURN                                                       null

End of function offsetunset

End of class C.

Generated using Vulcan Logic Dumper, using php 8.5.0


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