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<?php $a = ''; $b = NULL; $c = ' '; echo isset($a); echo "\r\n"; echo isset($b); echo "\r\n"; echo isset($c); echo "\r\n"; echo isset($d); echo "\r\n"; echo empty($a); echo "\r\n"; echo empty($b); echo "\r\n"; echo empty($c); echo "\r\n"; echo empty($d); echo "\r\n";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/KXIH0
function name:  (null)
number of ops:  28
compiled vars:  !0 = $a, !1 = $b, !2 = $c, !3 = $d
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, ''
    4     1        ASSIGN                                                   !1, null
    5     2        ASSIGN                                                   !2, '+'
    7     3        ISSET_ISEMPTY_CV                                 ~7      !0
          4        ECHO                                                     ~7
    8     5        ECHO                                                     '%0D%0A'
   10     6        ISSET_ISEMPTY_CV                                 ~8      !1
          7        ECHO                                                     ~8
   11     8        ECHO                                                     '%0D%0A'
   13     9        ISSET_ISEMPTY_CV                                 ~9      !2
         10        ECHO                                                     ~9
   14    11        ECHO                                                     '%0D%0A'
   16    12        ISSET_ISEMPTY_CV                                 ~10     !3
         13        ECHO                                                     ~10
   17    14        ECHO                                                     '%0D%0A'
   19    15        ISSET_ISEMPTY_CV                                 ~11     !0
         16        ECHO                                                     ~11
   20    17        ECHO                                                     '%0D%0A'
   22    18        ISSET_ISEMPTY_CV                                 ~12     !1
         19        ECHO                                                     ~12
   23    20        ECHO                                                     '%0D%0A'
   25    21        ISSET_ISEMPTY_CV                                 ~13     !2
         22        ECHO                                                     ~13
   26    23        ECHO                                                     '%0D%0A'
   28    24        ISSET_ISEMPTY_CV                                 ~14     !3
         25        ECHO                                                     ~14
   29    26        ECHO                                                     '%0D%0A'
         27      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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