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<?php $object = new \ArrayObject(); $object['foo'] = null; var_dump($object); echo "\nobject array access:\n"; var_dump(isset($object['foo'])); var_dump(array_key_exists('foo', $object)); var_dump(property_exists($object, 'foo')); if (isset($object['foo']) || array_key_exists('foo', $object)) { var_dump($object['foo']); }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 47) Position 1 = 26, Position 2 = 28
Branch analysis from position: 26
2 jumps found. (Code = 43) Position 1 = 29, Position 2 = 33
Branch analysis from position: 29
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 33
Branch analysis from position: 28
filename:       /in/16e5v
function name:  (null)
number of ops:  34
compiled vars:  !0 = $object
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   NEW                                              $1      'ArrayObject'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $1
    4     3        ASSIGN_DIM                                               !0, 'foo'
          4        OP_DATA                                                  null
    6     5        INIT_FCALL                                               'var_dump'
          6        SEND_VAR                                                 !0
          7        DO_ICALL                                                 
    8     8        ECHO                                                     '%0Aobject+array+access%3A%0A'
   10     9        INIT_FCALL                                               'var_dump'
         10        ISSET_ISEMPTY_DIM_OBJ                         0  ~6      !0, 'foo'
         11        SEND_VAL                                                 ~6
         12        DO_ICALL                                                 
   11    13        INIT_FCALL                                               'var_dump'
         14        ARRAY_KEY_EXISTS                                 ~8      'foo', !0
         15        SEND_VAL                                                 ~8
         16        DO_ICALL                                                 
   12    17        INIT_FCALL                                               'var_dump'
         18        INIT_FCALL                                               'property_exists'
         19        SEND_VAR                                                 !0
         20        SEND_VAL                                                 'foo'
         21        DO_ICALL                                         $10     
         22        SEND_VAR                                                 $10
         23        DO_ICALL                                                 
   14    24        ISSET_ISEMPTY_DIM_OBJ                         0  ~12     !0, 'foo'
         25      > JMPNZ_EX                                         ~12     ~12, ->28
         26    >   ARRAY_KEY_EXISTS                                 ~13     'foo', !0
         27        BOOL                                             ~12     ~13
         28    > > JMPZ                                                     ~12, ->33
   15    29    >   INIT_FCALL                                               'var_dump'
         30        FETCH_DIM_R                                      ~14     !0, 'foo'
         31        SEND_VAL                                                 ~14
         32        DO_ICALL                                                 
   16    33    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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