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<?php $x = null; var_dump($x); var_dump($y); var_dump($x===$y); echo (isset($x)); isset($y); ?>
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/k3kZq
function name:  (null)
number of ops:  16
compiled vars:  !0 = $x, !1 = $y
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, null
    3     1        INIT_FCALL                                               'var_dump'
          2        SEND_VAR                                                 !0
          3        DO_ICALL                                                 
    4     4        INIT_FCALL                                               'var_dump'
          5        SEND_VAR                                                 !1
          6        DO_ICALL                                                 
    5     7        INIT_FCALL                                               'var_dump'
          8        IS_IDENTICAL                                     ~5      !0, !1
          9        SEND_VAL                                                 ~5
         10        DO_ICALL                                                 
    6    11        ISSET_ISEMPTY_CV                                 ~7      !0
         12        ECHO                                                     ~7
    7    13        ISSET_ISEMPTY_CV                                 ~8      !1
         14        FREE                                                     ~8
    8    15      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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