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<?php $var = NULL; var_dump(isset($var)); var_dump(array_key_exists('var', $GLOBALS));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ZnIA0
function name:  (null)
number of ops:  11
compiled vars:  !0 = $var
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, null
    5     1        INIT_FCALL                                               'var_dump'
          2        ISSET_ISEMPTY_CV                                 ~2      !0
          3        SEND_VAL                                                 ~2
          4        DO_ICALL                                                 
    7     5        INIT_FCALL                                               'var_dump'
          6        FETCH_R                      global              ~4      'GLOBALS'
          7        ARRAY_KEY_EXISTS                                 ~5      'var', ~4
          8        SEND_VAL                                                 ~5
          9        DO_ICALL                                                 
         10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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