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<?php error_reporting(-1); function myCheck($in) { return isset($in); } $var1='Something'; $var2='var1'; echo 'Set:' . isset($$var2); $var2='nope'; echo 'Set:' . isset($$var2); $var2='var1'; echo 'Set:' . myCheck($$var2); $var2='nope'; echo 'Set:' . myCheck($$var2); ?>
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/DcEqM
function name:  (null)
number of ops:  27
compiled vars:  !0 = $var1, !1 = $var2
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'error_reporting'
          1        SEND_VAL                                                 -1
          2        DO_ICALL                                                 
    8     3        ASSIGN                                                   !0, 'Something'
   10     4        ASSIGN                                                   !1, 'var1'
   11     5        ISSET_ISEMPTY_VAR                             4  ~5      !1
          6        CONCAT                                           ~6      'Set%3A', ~5
          7        ECHO                                                     ~6
   12     8        ASSIGN                                                   !1, 'nope'
   13     9        ISSET_ISEMPTY_VAR                             4  ~8      !1
         10        CONCAT                                           ~9      'Set%3A', ~8
         11        ECHO                                                     ~9
   16    12        ASSIGN                                                   !1, 'var1'
   17    13        INIT_FCALL                                               'mycheck'
         14        FETCH_R                      local               ~11     !1
         15        SEND_VAL                                                 ~11
         16        DO_FCALL                                      0  $12     
         17        CONCAT                                           ~13     'Set%3A', $12
         18        ECHO                                                     ~13
   18    19        ASSIGN                                                   !1, 'nope'
   19    20        INIT_FCALL                                               'mycheck'
         21        FETCH_R                      local               ~15     !1
         22        SEND_VAL                                                 ~15
         23        DO_FCALL                                      0  $16     
         24        CONCAT                                           ~17     'Set%3A', $16
         25        ECHO                                                     ~17
   22    26      > RETURN                                                   1

Function mycheck:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/DcEqM
function name:  myCheck
number of ops:  4
compiled vars:  !0 = $in
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   RECV                                             !0      
    6     1        ISSET_ISEMPTY_CV                                 ~1      !0
          2      > RETURN                                                   ~1
          3*     > RETURN                                                   null

End of function mycheck

Generated using Vulcan Logic Dumper, using php 8.0.0


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