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<?php $set_var = 'i_am_set'; var_dump( isset($set_var) <> '' ); // Outputs bool(true) var_dump( isset($unset_var) <> '' ); // Outputs bool(false)
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Ujtg1
function name:  (null)
number of ops:  12
compiled vars:  !0 = $set_var, !1 = $unset_var
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'i_am_set'
    4     1        INIT_FCALL                                               'var_dump'
          2        ISSET_ISEMPTY_CV                                 ~3      !0
          3        IS_NOT_EQUAL                                     ~4      ~3, ''
          4        SEND_VAL                                                 ~4
          5        DO_ICALL                                                 
    5     6        INIT_FCALL                                               'var_dump'
          7        ISSET_ISEMPTY_CV                                 ~6      !1
          8        IS_NOT_EQUAL                                     ~7      ~6, ''
          9        SEND_VAL                                                 ~7
         10        DO_ICALL                                                 
         11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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