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<?php $zero = 0; $null = NULL; var_dump(!isset($zero)); var_dump(!isset($null)); var_dump(empty($zero)); var_dump(empty($null)); var_dump(is_null($zero)); var_dump(is_null($null));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Qf7eH
function name:  (null)
number of ops:  29
compiled vars:  !0 = $zero, !1 = $null
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 0
    3     1        ASSIGN                                                   !1, null
    5     2        INIT_FCALL                                               'var_dump'
          3        ISSET_ISEMPTY_CV                                 ~4      !0
          4        BOOL_NOT                                         ~5      ~4
          5        SEND_VAL                                                 ~5
          6        DO_ICALL                                                 
    6     7        INIT_FCALL                                               'var_dump'
          8        ISSET_ISEMPTY_CV                                 ~7      !1
          9        BOOL_NOT                                         ~8      ~7
         10        SEND_VAL                                                 ~8
         11        DO_ICALL                                                 
    8    12        INIT_FCALL                                               'var_dump'
         13        ISSET_ISEMPTY_CV                                 ~10     !0
         14        SEND_VAL                                                 ~10
         15        DO_ICALL                                                 
    9    16        INIT_FCALL                                               'var_dump'
         17        ISSET_ISEMPTY_CV                                 ~12     !1
         18        SEND_VAL                                                 ~12
         19        DO_ICALL                                                 
   11    20        INIT_FCALL                                               'var_dump'
         21        TYPE_CHECK                                    2  ~14     !0
         22        SEND_VAL                                                 ~14
         23        DO_ICALL                                                 
   12    24        INIT_FCALL                                               'var_dump'
         25        TYPE_CHECK                                    2  ~16     !1
         26        SEND_VAL                                                 ~16
         27        DO_ICALL                                                 
         28      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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