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<?php $dom = new DOMDocument(); $dom->loadXml('<foo><bar/></foo>'); var_dump(isset($dom->documentElement->parentNode), $dom->documentElement->parentNode); var_dump(isset($dom->documentElement->firstChild->parentNode), $dom->documentElement->firstChild->parentNode);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ZP7fQ
function name:  (null)
number of ops:  25
compiled vars:  !0 = $dom
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   NEW                                              $1      'DOMDocument'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $1
    4     3        INIT_METHOD_CALL                                         !0, 'loadXml'
          4        SEND_VAL_EX                                              '%3Cfoo%3E%3Cbar%2F%3E%3C%2Ffoo%3E'
          5        DO_FCALL                                      0          
    6     6        INIT_FCALL                                               'var_dump'
          7        FETCH_OBJ_IS                                     ~5      !0, 'documentElement'
          8        ISSET_ISEMPTY_PROP_OBJ                           ~6      ~5, 'parentNode'
          9        SEND_VAL                                                 ~6
         10        FETCH_OBJ_R                                      ~7      !0, 'documentElement'
         11        FETCH_OBJ_R                                      ~8      ~7, 'parentNode'
         12        SEND_VAL                                                 ~8
         13        DO_ICALL                                                 
    7    14        INIT_FCALL                                               'var_dump'
         15        FETCH_OBJ_IS                                     ~10     !0, 'documentElement'
         16        FETCH_OBJ_IS                                     ~11     ~10, 'firstChild'
         17        ISSET_ISEMPTY_PROP_OBJ                           ~12     ~11, 'parentNode'
         18        SEND_VAL                                                 ~12
         19        FETCH_OBJ_R                                      ~13     !0, 'documentElement'
         20        FETCH_OBJ_R                                      ~14     ~13, 'firstChild'
         21        FETCH_OBJ_R                                      ~15     ~14, 'parentNode'
         22        SEND_VAL                                                 ~15
         23        DO_ICALL                                                 
         24      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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