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<?php $a = new stdClass; $item='null'; var_dump(array_key_exists('null', $a), array_key_exists('a', $a));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/lr2ia
function name:  (null)
number of ops:  11
compiled vars:  !0 = $a, !1 = $item
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   NEW                                              $2      'stdClass'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $2
    3     3        ASSIGN                                                   !1, 'null'
    4     4        INIT_FCALL                                               'var_dump'
          5        ARRAY_KEY_EXISTS                                 ~6      'null', !0
          6        SEND_VAL                                                 ~6
          7        ARRAY_KEY_EXISTS                                 ~7      'a', !0
          8        SEND_VAL                                                 ~7
          9        DO_ICALL                                                 
         10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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