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<?php $test1 = $_GET['test1']; $test2 = null; var_dump(isset($test1)); var_dump($test2 == null);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/cNsEJ
function name:  (null)
number of ops:  13
compiled vars:  !0 = $test1, !1 = $test2
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   FETCH_R                      global              ~2      '_GET'
          1        FETCH_DIM_R                                      ~3      ~2, 'test1'
          2        ASSIGN                                                   !0, ~3
    4     3        ASSIGN                                                   !1, null
    6     4        INIT_FCALL                                               'var_dump'
          5        ISSET_ISEMPTY_CV                                 ~6      !0
          6        SEND_VAL                                                 ~6
          7        DO_ICALL                                                 
    7     8        INIT_FCALL                                               'var_dump'
          9        IS_EQUAL                                         ~8      !1, null
         10        SEND_VAL                                                 ~8
         11        DO_ICALL                                                 
         12      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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