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<?php if(defined(WHATEVER_THIS_ISNT_DEFINED)){ echo 'yup, constant defined'; } else { echo 'nope, does not exist'; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 5, Position 2 = 7
Branch analysis from position: 5
1 jumps found. (Code = 42) Position 1 = 8
Branch analysis from position: 8
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Y1S8Z
function name:  (null)
number of ops:  9
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'defined'
          1        FETCH_CONSTANT                                   ~0      'WHATEVER_THIS_ISNT_DEFINED'
          2        SEND_VAL                                                 ~0
          3        DO_ICALL                                         $1      
          4      > JMPZ                                                     $1, ->7
    3     5    >   ECHO                                                     'yup%2C+constant+defined'
          6      > JMP                                                      ->8
    7     7    >   ECHO                                                     'nope%2C+does+not+exist'
    8     8    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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