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<?php $a = 100; $b = $a; $a = null; var_dump(is_set($a)); var_dump($b);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/nMWSj
function name:  (null)
number of ops:  13
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   ASSIGN                                                   !0, 100
    5     1        ASSIGN                                                   !1, !0
    7     2        ASSIGN                                                   !0, null
    8     3        INIT_FCALL                                               'var_dump'
          4        INIT_FCALL_BY_NAME                                       'is_set'
          5        SEND_VAR_EX                                              !0
          6        DO_FCALL                                      0  $5      
          7        SEND_VAR                                                 $5
          8        DO_ICALL                                                 
   10     9        INIT_FCALL                                               'var_dump'
         10        SEND_VAR                                                 !1
         11        DO_ICALL                                                 
         12      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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